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Add epoch-based chunk cache purge with ring buffer for thread-local reuse - #16766

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netty:4.2from
franz1981:4.2_chunk_purge
Jun 5, 2026
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Add epoch-based chunk cache purge with ring buffer for thread-local reuse#16766
franz1981 merged 14 commits into
netty:4.2from
franz1981:4.2_chunk_purge

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@franz1981

@franz1981 franz1981 commented May 7, 2026

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Motivation:

The bounded ConcurrentQueueChunkCache causes chunk malloc/free churn on low-core containers (CHUNK_REUSE_QUEUE=4 on 2 cores). Dead chunks fill the queue, pollChunk cannot find reusable ones, and new chunks are malloc'd while old ones overflow and get deallocated.

Modification:

Replace with unbounded size-classed caches and epoch-based idle chunk eviction. Thread-local cache uses an in-place ring buffer partitioned into [notEmpty | empty] zones for O(1) scanForCapacity. Shared cache uses a fixed MPMC queue sized to max(128, CHUNK_REUSE_QUEUE * 2).

Purge scan runs periodically (every 16/128 polls), ages fully-free chunks via purgeEpoch, and evicts past threshold while retaining at least CHUNK_REUSE_QUEUE chunks to match the baseline warm-cache behavior at idle.

Result:

Eliminates chunk churn on low-core machines. No regression on all-cores production path.

@franz1981
franz1981 requested review from chrisvest and Copilot May 7, 2026 20:29
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franz1981 commented May 7, 2026

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Benchmark environment

  • CPU: AMD Ryzen 9 7950X 16-Core (2 NUMA nodes)
  • JDK: 21.0.11 (Oracle HotSpot)
  • OS: Fedora 43, glibc 2.42
  • Pinning: taskset -c 0,1 (2 physical cores, NUMA node 0)

JMH: ByteBufAllocatorAllocPatternBenchmark.heapAllocation

Config Baseline 4.2 Purge branch
2-core + harness 216 ns/op, 1933 B/op 78 ns/op, 12 B/op
All-cores + harness 82 ns/op, ~0 B/op 74 ns/op, ~0 B/op
2-core no harness 256 ns/op, 1931 B/op 116 ns/op, ~0 B/op
All-cores no harness 115 ns/op, ~0 B/op 116 ns/op, ~0 B/op

Churn eliminated on low-core configs. No regression on all-cores.

AllocationPatternSimulator (2-core, steady-state memory)

WebSocket proxy pattern

Size class Baseline 4.2 Purge branch
A(128) 5.3 MB 4.8 MB
A(512) 13.5-14.3 MB (unstable) 8.4 MB (stable)
A(1024) 33-35 MB (unstable) 14.5-15 MB (stable)

E-commerce JFR pattern

Size class Baseline 4.2 Purge branch
A(128) 8.9 MB 10.8 MB (+21%, retention floor)
A(512) 16.3-17.3 MB 16.2 MB
A(1024) 40-47 MB (unstable) 38-40 MB (stable)

Comparison with ParkingLot PR (#16730)

ParkingLot Purge branch
Hot path O(1) notification-driven O(1) ring partition head
Cold path None O(count) reads every 16/128 polls
Memory reclamation Never frees chunks Epoch aging + retention floor
Dependencies Needs unbounded MPMC (JCTools) Self-contained
Throughput (2-core) 91-101 ns/op 78 ns/op
E-commerce A(1024) 48.6 MB 38-40 MB
WebSocket A(512) 9.4 MB 8.4 MB

The purge branch is faster, bounds memory, and has no external dependency.
ParkingLot has zero cold-path overhead but never reclaims idle chunks.

If the shared MPMC queue is replaced with an unbounded collection in the
future, the epoch purge becomes the sole eviction mechanism — making
eviction intentional rather than accidental (queue overflow).

@franz1981

franz1981 commented May 7, 2026

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@laosijikaichele FYI ^^ this replace #16730 IMHO

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Pull request overview

This PR updates Netty’s AdaptivePoolingAllocator chunk reuse mechanism to reduce chunk churn (malloc/free) on low-core machines by switching from a bounded shared reuse queue to size-classed caches with an epoch-based purge/eviction strategy.

Changes:

  • Introduces a SizeClassedChunkCache with a thread-local SPSC ring-buffer implementation and a shared fixed-capacity MPMC implementation.
  • Adds purge-scan budgeting (CHUNK_PURGE_POLLS_*) and epoch-based eviction (purgeEpoch, CHUNK_PURGE_THRESHOLD) while retaining a minimum warm-cache floor (CHUNK_REUSE_QUEUE).
  • Adds unit/integration tests validating purge selection, aging/eviction, ring-buffer behavior, and allocator-level memory reduction after purge scans.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 3 comments.

File Description
buffer/src/main/java/io/netty/buffer/AdaptivePoolingAllocator.java Replaces the old chunk cache with size-classed caches and adds epoch/generation-based purge logic.
buffer/src/test/java/io/netty/buffer/AdaptiveByteBufAllocatorTest.java Adds an integration test asserting purge scans eventually evict idle chunks (heap memory decreases).
buffer/src/test/java/io/netty/buffer/SizeClassedChunkCacheTest.java Adds focused tests for selection, epoch aging/eviction, and thread-local ring-buffer mechanics.

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Comment thread buffer/src/main/java/io/netty/buffer/AdaptivePoolingAllocator.java
Comment thread buffer/src/main/java/io/netty/buffer/AdaptivePoolingAllocator.java
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Comment thread buffer/src/main/java/io/netty/buffer/AdaptivePoolingAllocator.java
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franz1981 marked this pull request as draft May 7, 2026 21:07
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franz1981 force-pushed the 4.2_chunk_purge branch 2 times, most recently from e08902c to d0cedb9 Compare May 8, 2026 09:03
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franz1981 marked this pull request as draft May 8, 2026 12:16
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franz1981 commented May 8, 2026

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Still working on the algorithm; something is off with the "aging" mechanism ^^

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franz1981 force-pushed the 4.2_chunk_purge branch 6 times, most recently from 3824e24 to 73a1548 Compare May 9, 2026 06:32
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Pull request overview

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

Comment thread buffer/src/main/java/io/netty/buffer/AdaptivePoolingAllocator.java
Comment thread buffer/src/main/java/io/netty/buffer/AdaptivePoolingAllocator.java Outdated
@franz1981
franz1981 requested a review from Copilot May 9, 2026 07:59
@chrisvest chrisvest added this to the 4.2.16.Final milestone Jun 4, 2026
@chrisvest chrisvest added the needs-cherry-pick-5.0 This PR should be cherry-picked to 5.0 once merged. label Jun 4, 2026
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franz1981 commented Jun 5, 2026

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As agreed with @chrisvest - ready to go! thanks everyone!

@franz1981
franz1981 merged commit ee2cb98 into netty:4.2 Jun 5, 2026
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netty-project-bot commented Jun 5, 2026

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Auto-port PR for 5.0: #16918

@github-actions github-actions Bot removed the needs-cherry-pick-5.0 This PR should be cherry-picked to 5.0 once merged. label Jun 5, 2026
chrisvest pushed a commit that referenced this pull request Jun 5, 2026
@netty-project-bot @franz1981
Auto-port 5.0: Add epoch-based chunk cache purge with ring buffer for…
3c7e564 
… thread-local reuse (#16918)

Auto-port of #16766 to 5.0
Cherry-picked commit: ee2cb98

---
Motivation:

The bounded ConcurrentQueueChunkCache causes chunk malloc/free churn on
low-core containers (CHUNK_REUSE_QUEUE=4 on 2 cores). Dead chunks fill
the queue, pollChunk cannot find reusable ones, and new chunks are
malloc'd while old ones overflow and get deallocated.

Modification:

Replace with unbounded size-classed caches and epoch-based idle chunk
eviction. Thread-local cache uses an in-place ring buffer partitioned
into [notEmpty | empty] zones for O(1) scanForCapacity. Shared cache
uses a fixed MPMC queue sized to max(128, CHUNK_REUSE_QUEUE * 2).

Purge scan runs periodically (every 16/128 polls), ages fully-free
chunks via purgeEpoch, and evicts past threshold while retaining at
least CHUNK_REUSE_QUEUE chunks to match the baseline warm-cache behavior
at idle.

Result:

Eliminates chunk churn on low-core machines. No regression on all-cores
production path.

Co-authored-by: Francesco Nigro <[email protected]>
@laosijikaichele

laosijikaichele commented Jun 27, 2026

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@laosijikaichele any chance you tried this change ? 🙏

Unfortunately, we currently don't have resources to try this...

I recently ran a few benchmarks on Netty's allocators, including this PR with adaptive.
Result charts: https://neoionet.github.io/netty-allocator-benchmark-report/1.1.1/benchmark.html.
Env specification: https://neoionet.github.io/netty-allocator-benchmark-report/1.1.1/specification.
Feel free to take a look if you're interested. @franz1981

@franz1981

franz1981 commented Jun 29, 2026 •
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@laosijikaichele this is a great feedback, now checking the results:
image

Can you upload it into a proper issue for the cases which doesn't work well with some way to reproduce/understand them better? So i can work on improve things ❤️
Consider that my changes shouldn't affect the case with so many cores - so these tests are really more related to the original behaviour.

@laosijikaichele laosijikaichele mentioned this pull request Jul 1, 2026
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laosijikaichele commented Jul 1, 2026

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Can you upload it into a proper issue for the cases which doesn't work well with some way to reproduce/understand them better?

Please check #17028.

mergify Bot added a commit to ArcadeData/arcadedb that referenced this pull request Jul 8, 2026
@mergify
chore(deps): bump io.netty:netty-all from 4.2.15.Final to 4.2.16.Fina…
ef9c773 
…l [skip ci]

Bumps [io.netty:netty-all](https://github.com/netty/netty) from 4.2.15.Final to 4.2.16.Final.
Release notes

*Sourced from [io.netty:netty-all's releases](https://github.com/netty/netty/releases).*

> netty-4.2.16.Final
> ------------------
>
> What's Changed
> --------------
>
> * Document Java 9 requirement for io\_uring by [`@​jchambers`](https://github.com/jchambers) in [netty/netty#16904](https://redirect.github.com/netty/netty/pull/16904)
> * Add BlockHound exception for DnsQueryIdSpace by [`@​violetagg`](https://github.com/violetagg) in [netty/netty#16896](https://redirect.github.com/netty/netty/pull/16896)
> * Fix incorrect bounds in error message of HpackDecoder.setMaxHeaderListSize by [`@​skyguard1`](https://github.com/skyguard1) in [netty/netty#16901](https://redirect.github.com/netty/netty/pull/16901)
> * Add epoch-based chunk cache purge with ring buffer for thread-local reuse by [`@​franz1981`](https://github.com/franz1981) in [netty/netty#16766](https://redirect.github.com/netty/netty/pull/16766)
> * Use Splittable/ThreadLocalRandom to generate bulk data in tests by [`@​chrisvest`](https://github.com/chrisvest) in [netty/netty#16808](https://redirect.github.com/netty/netty/pull/16808)
> * Auto-port 4.2: SingleThreadEventExecutor: document Throwable safety contract on run() by [`@​netty-project-bot`](https://github.com/netty-project-bot) in [netty/netty#16909](https://redirect.github.com/netty/netty/pull/16909)
> * Auto-port 4.2: Make HTTP/2 frame hashCode consistent with equals by [`@​netty-project-bot`](https://github.com/netty-project-bot) in [netty/netty#16910](https://redirect.github.com/netty/netty/pull/16910)
> * Auto-port 4.2: MQTT: Make the decodeProperties early-REPLAY check actually fire by [`@​netty-project-bot`](https://github.com/netty-project-bot) in [netty/netty#16919](https://redirect.github.com/netty/netty/pull/16919)
> * IoUring: fix io\_uring datagram writes with non-zero readerIndex by [`@​dreamlike-ocean`](https://github.com/dreamlike-ocean) in [netty/netty#16905](https://redirect.github.com/netty/netty/pull/16905)
> * Exclude internal events from IoHandler.run() return value in epoll, io\_uring and kqueue by [`@​franz1981`](https://github.com/franz1981) in [netty/netty#16848](https://redirect.github.com/netty/netty/pull/16848)
> * IoUring: Pass IORING\_ENTER\_NO\_IOWAIT to report accurate CPU usage by [`@​wineway`](https://github.com/wineway) in [netty/netty#16739](https://redirect.github.com/netty/netty/pull/16739)
> * Avoid logging exceptions that tests ignore by [`@​chrisvest`](https://github.com/chrisvest) in [netty/netty#16891](https://redirect.github.com/netty/netty/pull/16891)
> * Reject control characters at the boundary of HTTP method names by [`@​daguimu`](https://github.com/daguimu) in [netty/netty#16723](https://redirect.github.com/netty/netty/pull/16723)
> * IoUring: fix TCP Fast Open initial writes with readerIndex and composites by [`@​dreamlike-ocean`](https://github.com/dreamlike-ocean) in [netty/netty#16929](https://redirect.github.com/netty/netty/pull/16929)
> * Try to fix/stabilize a number of flaky tests by [`@​chrisvest`](https://github.com/chrisvest) in [netty/netty#16934](https://redirect.github.com/netty/netty/pull/16934)
> * Fix propagation of startTls for client SslContext handlers by [`@​skyguard1`](https://github.com/skyguard1) in [netty/netty#16931](https://redirect.github.com/netty/netty/pull/16931)
> * Update to latest tcnative release by [`@​normanmaurer`](https://github.com/normanmaurer) in [netty/netty#16936](https://redirect.github.com/netty/netty/pull/16936)
> * Move test to shared testsuite by [`@​normanmaurer`](https://github.com/normanmaurer) in [netty/netty#16928](https://redirect.github.com/netty/netty/pull/16928)
> * [Refactor] Useful helper method getOrDefault & cleaner abstraction by [`@​sanjomo`](https://github.com/sanjomo) in [netty/netty#16927](https://redirect.github.com/netty/netty/pull/16927)
> * Make permessage-deflate server window size and memLevel configurable by [`@​fru1tworld`](https://github.com/fru1tworld) in [netty/netty#16809](https://redirect.github.com/netty/netty/pull/16809)
> * Return early in DnsQueryContext.writeQuery when the query ID space is exhausted by [`@​HwangRock`](https://github.com/HwangRock) in [netty/netty#16950](https://redirect.github.com/netty/netty/pull/16950)
> * Fix HTTP 2 PUSH\_PROMISE stream association validation by [`@​skyguard1`](https://github.com/skyguard1) in [netty/netty#16952](https://redirect.github.com/netty/netty/pull/16952)
> * Fix GZIP FEXTRA extra-field handling in JdkZlibDecoder by [`@​daguimu`](https://github.com/daguimu) in [netty/netty#16951](https://redirect.github.com/netty/netty/pull/16951)
> * Http3FrameCodec handle fragmented payloads when skipping unknown frames by [`@​skyguard1`](https://github.com/skyguard1) in [netty/netty#16960](https://redirect.github.com/netty/netty/pull/16960)
> * Add opt-in validation of mandatory pseudo-header fields for HTTP/2 by [`@​hyperxpro`](https://github.com/hyperxpro) in [netty/netty#16932](https://redirect.github.com/netty/netty/pull/16932)
> * Strictly validate MQTT UTF-8 Encoded String by [`@​skyguard1`](https://github.com/skyguard1) in [netty/netty#16939](https://redirect.github.com/netty/netty/pull/16939)
> * Stop DateFormatter trailing token from running past the parse end by [`@​daguimu`](https://github.com/daguimu) in [netty/netty#16958](https://redirect.github.com/netty/netty/pull/16958)
> * IpFilter: Deprecate constructor which use accept by default by [`@​normanmaurer`](https://github.com/normanmaurer) in [netty/netty#16961](https://redirect.github.com/netty/netty/pull/16961)
> * Add RFC 10008 QUERY Method support by [`@​desiderantes`](https://github.com/desiderantes) in [netty/netty#16966](https://redirect.github.com/netty/netty/pull/16966)
> * Correctly release and fail queued traffic-shaping writes on close by [`@​skyguard1`](https://github.com/skyguard1) in [netty/netty#16959](https://redirect.github.com/netty/netty/pull/16959)
> * Reject control characters at the boundary of the HTTP version token by [`@​HwangRock`](https://github.com/HwangRock) in [netty/netty#16971](https://redirect.github.com/netty/netty/pull/16971)
> * FlowControlHandler: respect auto-read when toggled while dequeueing by [`@​schiemon`](https://github.com/schiemon) in [netty/netty#16949](https://redirect.github.com/netty/netty/pull/16949)
> * Fix leak in ReferenceCountedOpenSslEngine.addCredential by [`@​jmcrawford45`](https://github.com/jmcrawford45) in [netty/netty#16979](https://redirect.github.com/netty/netty/pull/16979)
> * IdleStateHandler: reset firstWriter/ReaderIdleEvent in resetWriteTimeout/resetReadTimeout by [`@​husseinvr97`](https://github.com/husseinvr97) in [netty/netty#16982](https://redirect.github.com/netty/netty/pull/16982)
> * Fix typo in AbstractSniHandler Javadoc by [`@​coderbruis`](https://github.com/coderbruis) in [netty/netty#16988](https://redirect.github.com/netty/netty/pull/16988)
> * Fix client/server inconsistency in SslCredential support matrix by [`@​jmcrawford45`](https://github.com/jmcrawford45) in [netty/netty#16990](https://redirect.github.com/netty/netty/pull/16990)
> * Reconcile `AbstractCoalescingBufferQueue` readableBytes when it drains, and fail stuck HTTP/2 streams instead of spinning empty DATA frames by [`@​gavinbunney`](https://github.com/gavinbunney) in [netty/netty#16947](https://redirect.github.com/netty/netty/pull/16947)
> * Use Ticker in Http2MaxRstFrameListener for testability by [`@​skyguard1`](https://github.com/skyguard1) in [netty/netty#16993](https://redirect.github.com/netty/netty/pull/16993)
> * Reset UTF-8 decode state on CR in StompSubframeDecoder by [`@​vasiliy-mikhailov`](https://github.com/vasiliy-mikhailov) in [netty/netty#16991](https://redirect.github.com/netty/netty/pull/16991)
> * FastLz: Guard decompression against truncated input by [`@​yawkat`](https://github.com/yawkat) in [netty/netty#17000](https://redirect.github.com/netty/netty/pull/17000)
> * Reject non-token characters in HTTP/2 header names by [`@​daguimu`](https://github.com/daguimu) in [netty/netty#16762](https://redirect.github.com/netty/netty/pull/16762)
> * Auto-port 4.2: Fix SelfSignCertificate initialization in tests by [`@​netty-project-bot`](https://github.com/netty-project-bot) in [netty/netty#17029](https://redirect.github.com/netty/netty/pull/17029)
> * Enable extension of Http3ClientConnectionHandler to support higher-level protocols such as WebTransport. by [`@​sanjomo`](https://github.com/sanjomo) in [netty/netty#17027](https://redirect.github.com/netty/netty/pull/17027)
> * Implement Adaptive Cumulator by [`@​shivaspeaks`](https://github.com/shivaspeaks) in [netty/netty#16731](https://redirect.github.com/netty/netty/pull/16731)
> * Allow WebSocket extension negotiation to be disabled per response by [`@​mkurz`](https://github.com/mkurz) in [netty/netty#17030](https://redirect.github.com/netty/netty/pull/17030)
> * Support QPACK sensitivity detector for Never Indexed header fields by [`@​skyguard1`](https://github.com/skyguard1) in [netty/netty#17026](https://redirect.github.com/netty/netty/pull/17026)
> * Fix maxAllocation for brotli-encoded content in HttpContentDecompressor by [`@​skyguard1`](https://github.com/skyguard1) in [netty/netty#17037](https://redirect.github.com/netty/netty/pull/17037)
> * Pin github actions to reduce risk by [`@​normanmaurer`](https://github.com/normanmaurer) in [netty/netty#17043](https://redirect.github.com/netty/netty/pull/17043)

... (truncated)


Commits

* [`3703d79`](netty/netty@3703d79) [maven-release-plugin] prepare release netty-4.2.16.Final
* [`63bbb2c`](netty/netty@63bbb2c) Update rust toolchain - add required parameters
* [`ac06c1b`](netty/netty@ac06c1b) Update rust toolchain
* [`5b68c61`](netty/netty@5b68c61) Merge branches from forks ([#17063](https://redirect.github.com/netty/netty/issues/17063))
* [`de5d276`](netty/netty@de5d276) Update lz4-java to 1.11.1 ([#17061](https://redirect.github.com/netty/netty/issues/17061))
* [`da22048`](netty/netty@da22048) Pin github actions to reduce risk ([#17043](https://redirect.github.com/netty/netty/issues/17043))
* [`0332676`](netty/netty@0332676) Fix maxAllocation for brotli-encoded content in HttpContentDecompressor ([#17037](https://redirect.github.com/netty/netty/issues/17037))
* [`7364401`](netty/netty@7364401) Support QPACK sensitivity detector for Never Indexed header fields ([#17026](https://redirect.github.com/netty/netty/issues/17026))
* [`06faf18`](netty/netty@06faf18) Allow WebSocket extension negotiation to be disabled per response ([#17030](https://redirect.github.com/netty/netty/issues/17030))
* [`bc4b983`](netty/netty@bc4b983) Implement Adaptive Cumulator ([#16731](https://redirect.github.com/netty/netty/issues/16731))
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mergify Bot added a commit to ArcadeData/arcadedb that referenced this pull request Jul 8, 2026
@mergify
chore(deps): bump netty.version from 4.2.15.Final to 4.2.16.Final [sk…
8cd1212 
…ip ci]

Bumps `netty.version` from 4.2.15.Final to 4.2.16.Final.
Updates `io.netty:netty-transport` from 4.2.15.Final to 4.2.16.Final
Release notes

*Sourced from [io.netty:netty-transport's releases](https://github.com/netty/netty/releases).*

> netty-4.2.16.Final
> ------------------
>
> What's Changed
> --------------
>
> * Document Java 9 requirement for io\_uring by [`@​jchambers`](https://github.com/jchambers) in [netty/netty#16904](https://redirect.github.com/netty/netty/pull/16904)
> * Add BlockHound exception for DnsQueryIdSpace by [`@​violetagg`](https://github.com/violetagg) in [netty/netty#16896](https://redirect.github.com/netty/netty/pull/16896)
> * Fix incorrect bounds in error message of HpackDecoder.setMaxHeaderListSize by [`@​skyguard1`](https://github.com/skyguard1) in [netty/netty#16901](https://redirect.github.com/netty/netty/pull/16901)
> * Add epoch-based chunk cache purge with ring buffer for thread-local reuse by [`@​franz1981`](https://github.com/franz1981) in [netty/netty#16766](https://redirect.github.com/netty/netty/pull/16766)
> * Use Splittable/ThreadLocalRandom to generate bulk data in tests by [`@​chrisvest`](https://github.com/chrisvest) in [netty/netty#16808](https://redirect.github.com/netty/netty/pull/16808)
> * Auto-port 4.2: SingleThreadEventExecutor: document Throwable safety contract on run() by [`@​netty-project-bot`](https://github.com/netty-project-bot) in [netty/netty#16909](https://redirect.github.com/netty/netty/pull/16909)
> * Auto-port 4.2: Make HTTP/2 frame hashCode consistent with equals by [`@​netty-project-bot`](https://github.com/netty-project-bot) in [netty/netty#16910](https://redirect.github.com/netty/netty/pull/16910)
> * Auto-port 4.2: MQTT: Make the decodeProperties early-REPLAY check actually fire by [`@​netty-project-bot`](https://github.com/netty-project-bot) in [netty/netty#16919](https://redirect.github.com/netty/netty/pull/16919)
> * IoUring: fix io\_uring datagram writes with non-zero readerIndex by [`@​dreamlike-ocean`](https://github.com/dreamlike-ocean) in [netty/netty#16905](https://redirect.github.com/netty/netty/pull/16905)
> * Exclude internal events from IoHandler.run() return value in epoll, io\_uring and kqueue by [`@​franz1981`](https://github.com/franz1981) in [netty/netty#16848](https://redirect.github.com/netty/netty/pull/16848)
> * IoUring: Pass IORING\_ENTER\_NO\_IOWAIT to report accurate CPU usage by [`@​wineway`](https://github.com/wineway) in [netty/netty#16739](https://redirect.github.com/netty/netty/pull/16739)
> * Avoid logging exceptions that tests ignore by [`@​chrisvest`](https://github.com/chrisvest) in [netty/netty#16891](https://redirect.github.com/netty/netty/pull/16891)
> * Reject control characters at the boundary of HTTP method names by [`@​daguimu`](https://github.com/daguimu) in [netty/netty#16723](https://redirect.github.com/netty/netty/pull/16723)
> * IoUring: fix TCP Fast Open initial writes with readerIndex and composites by [`@​dreamlike-ocean`](https://github.com/dreamlike-ocean) in [netty/netty#16929](https://redirect.github.com/netty/netty/pull/16929)
> * Try to fix/stabilize a number of flaky tests by [`@​chrisvest`](https://github.com/chrisvest) in [netty/netty#16934](https://redirect.github.com/netty/netty/pull/16934)
> * Fix propagation of startTls for client SslContext handlers by [`@​skyguard1`](https://github.com/skyguard1) in [netty/netty#16931](https://redirect.github.com/netty/netty/pull/16931)
> * Update to latest tcnative release by [`@​normanmaurer`](https://github.com/normanmaurer) in [netty/netty#16936](https://redirect.github.com/netty/netty/pull/16936)
> * Move test to shared testsuite by [`@​normanmaurer`](https://github.com/normanmaurer) in [netty/netty#16928](https://redirect.github.com/netty/netty/pull/16928)
> * [Refactor] Useful helper method getOrDefault & cleaner abstraction by [`@​sanjomo`](https://github.com/sanjomo) in [netty/netty#16927](https://redirect.github.com/netty/netty/pull/16927)
> * Make permessage-deflate server window size and memLevel configurable by [`@​fru1tworld`](https://github.com/fru1tworld) in [netty/netty#16809](https://redirect.github.com/netty/netty/pull/16809)
> * Return early in DnsQueryContext.writeQuery when the query ID space is exhausted by [`@​HwangRock`](https://github.com/HwangRock) in [netty/netty#16950](https://redirect.github.com/netty/netty/pull/16950)
> * Fix HTTP 2 PUSH\_PROMISE stream association validation by [`@​skyguard1`](https://github.com/skyguard1) in [netty/netty#16952](https://redirect.github.com/netty/netty/pull/16952)
> * Fix GZIP FEXTRA extra-field handling in JdkZlibDecoder by [`@​daguimu`](https://github.com/daguimu) in [netty/netty#16951](https://redirect.github.com/netty/netty/pull/16951)
> * Http3FrameCodec handle fragmented payloads when skipping unknown frames by [`@​skyguard1`](https://github.com/skyguard1) in [netty/netty#16960](https://redirect.github.com/netty/netty/pull/16960)
> * Add opt-in validation of mandatory pseudo-header fields for HTTP/2 by [`@​hyperxpro`](https://github.com/hyperxpro) in [netty/netty#16932](https://redirect.github.com/netty/netty/pull/16932)
> * Strictly validate MQTT UTF-8 Encoded String by [`@​skyguard1`](https://github.com/skyguard1) in [netty/netty#16939](https://redirect.github.com/netty/netty/pull/16939)
> * Stop DateFormatter trailing token from running past the parse end by [`@​daguimu`](https://github.com/daguimu) in [netty/netty#16958](https://redirect.github.com/netty/netty/pull/16958)
> * IpFilter: Deprecate constructor which use accept by default by [`@​normanmaurer`](https://github.com/normanmaurer) in [netty/netty#16961](https://redirect.github.com/netty/netty/pull/16961)
> * Add RFC 10008 QUERY Method support by [`@​desiderantes`](https://github.com/desiderantes) in [netty/netty#16966](https://redirect.github.com/netty/netty/pull/16966)
> * Correctly release and fail queued traffic-shaping writes on close by [`@​skyguard1`](https://github.com/skyguard1) in [netty/netty#16959](https://redirect.github.com/netty/netty/pull/16959)
> * Reject control characters at the boundary of the HTTP version token by [`@​HwangRock`](https://github.com/HwangRock) in [netty/netty#16971](https://redirect.github.com/netty/netty/pull/16971)
> * FlowControlHandler: respect auto-read when toggled while dequeueing by [`@​schiemon`](https://github.com/schiemon) in [netty/netty#16949](https://redirect.github.com/netty/netty/pull/16949)
> * Fix leak in ReferenceCountedOpenSslEngine.addCredential by [`@​jmcrawford45`](https://github.com/jmcrawford45) in [netty/netty#16979](https://redirect.github.com/netty/netty/pull/16979)
> * IdleStateHandler: reset firstWriter/ReaderIdleEvent in resetWriteTimeout/resetReadTimeout by [`@​husseinvr97`](https://github.com/husseinvr97) in [netty/netty#16982](https://redirect.github.com/netty/netty/pull/16982)
> * Fix typo in AbstractSniHandler Javadoc by [`@​coderbruis`](https://github.com/coderbruis) in [netty/netty#16988](https://redirect.github.com/netty/netty/pull/16988)
> * Fix client/server inconsistency in SslCredential support matrix by [`@​jmcrawford45`](https://github.com/jmcrawford45) in [netty/netty#16990](https://redirect.github.com/netty/netty/pull/16990)
> * Reconcile `AbstractCoalescingBufferQueue` readableBytes when it drains, and fail stuck HTTP/2 streams instead of spinning empty DATA frames by [`@​gavinbunney`](https://github.com/gavinbunney) in [netty/netty#16947](https://redirect.github.com/netty/netty/pull/16947)
> * Use Ticker in Http2MaxRstFrameListener for testability by [`@​skyguard1`](https://github.com/skyguard1) in [netty/netty#16993](https://redirect.github.com/netty/netty/pull/16993)
> * Reset UTF-8 decode state on CR in StompSubframeDecoder by [`@​vasiliy-mikhailov`](https://github.com/vasiliy-mikhailov) in [netty/netty#16991](https://redirect.github.com/netty/netty/pull/16991)
> * FastLz: Guard decompression against truncated input by [`@​yawkat`](https://github.com/yawkat) in [netty/netty#17000](https://redirect.github.com/netty/netty/pull/17000)
> * Reject non-token characters in HTTP/2 header names by [`@​daguimu`](https://github.com/daguimu) in [netty/netty#16762](https://redirect.github.com/netty/netty/pull/16762)
> * Auto-port 4.2: Fix SelfSignCertificate initialization in tests by [`@​netty-project-bot`](https://github.com/netty-project-bot) in [netty/netty#17029](https://redirect.github.com/netty/netty/pull/17029)
> * Enable extension of Http3ClientConnectionHandler to support higher-level protocols such as WebTransport. by [`@​sanjomo`](https://github.com/sanjomo) in [netty/netty#17027](https://redirect.github.com/netty/netty/pull/17027)
> * Implement Adaptive Cumulator by [`@​shivaspeaks`](https://github.com/shivaspeaks) in [netty/netty#16731](https://redirect.github.com/netty/netty/pull/16731)
> * Allow WebSocket extension negotiation to be disabled per response by [`@​mkurz`](https://github.com/mkurz) in [netty/netty#17030](https://redirect.github.com/netty/netty/pull/17030)
> * Support QPACK sensitivity detector for Never Indexed header fields by [`@​skyguard1`](https://github.com/skyguard1) in [netty/netty#17026](https://redirect.github.com/netty/netty/pull/17026)
> * Fix maxAllocation for brotli-encoded content in HttpContentDecompressor by [`@​skyguard1`](https://github.com/skyguard1) in [netty/netty#17037](https://redirect.github.com/netty/netty/pull/17037)
> * Pin github actions to reduce risk by [`@​normanmaurer`](https://github.com/normanmaurer) in [netty/netty#17043](https://redirect.github.com/netty/netty/pull/17043)

... (truncated)


Commits

* [`3703d79`](netty/netty@3703d79) [maven-release-plugin] prepare release netty-4.2.16.Final
* [`63bbb2c`](netty/netty@63bbb2c) Update rust toolchain - add required parameters
* [`ac06c1b`](netty/netty@ac06c1b) Update rust toolchain
* [`5b68c61`](netty/netty@5b68c61) Merge branches from forks ([#17063](https://redirect.github.com/netty/netty/issues/17063))
* [`de5d276`](netty/netty@de5d276) Update lz4-java to 1.11.1 ([#17061](https://redirect.github.com/netty/netty/issues/17061))
* [`da22048`](netty/netty@da22048) Pin github actions to reduce risk ([#17043](https://redirect.github.com/netty/netty/issues/17043))
* [`0332676`](netty/netty@0332676) Fix maxAllocation for brotli-encoded content in HttpContentDecompressor ([#17037](https://redirect.github.com/netty/netty/issues/17037))
* [`7364401`](netty/netty@7364401) Support QPACK sensitivity detector for Never Indexed header fields ([#17026](https://redirect.github.com/netty/netty/issues/17026))
* [`06faf18`](netty/netty@06faf18) Allow WebSocket extension negotiation to be disabled per response ([#17030](https://redirect.github.com/netty/netty/issues/17030))
* [`bc4b983`](netty/netty@bc4b983) Implement Adaptive Cumulator ([#16731](https://redirect.github.com/netty/netty/issues/16731))
* Additional commits viewable in [compare view](netty/netty@netty-4.2.15.Final...netty-4.2.16.Final)
  
Updates `io.netty:netty-codec` from 4.2.15.Final to 4.2.16.Final
Release notes

*Sourced from [io.netty:netty-codec's releases](https://github.com/netty/netty/releases).*

> netty-4.2.16.Final
> ------------------
>
> What's Changed
> --------------
>
> * Document Java 9 requirement for io\_uring by [`@​jchambers`](https://github.com/jchambers) in [netty/netty#16904](https://redirect.github.com/netty/netty/pull/16904)
> * Add BlockHound exception for DnsQueryIdSpace by [`@​violetagg`](https://github.com/violetagg) in [netty/netty#16896](https://redirect.github.com/netty/netty/pull/16896)
> * Fix incorrect bounds in error message of HpackDecoder.setMaxHeaderListSize by [`@​skyguard1`](https://github.com/skyguard1) in [netty/netty#16901](https://redirect.github.com/netty/netty/pull/16901)
> * Add epoch-based chunk cache purge with ring buffer for thread-local reuse by [`@​franz1981`](https://github.com/franz1981) in [netty/netty#16766](https://redirect.github.com/netty/netty/pull/16766)
> * Use Splittable/ThreadLocalRandom to generate bulk data in tests by [`@​chrisvest`](https://github.com/chrisvest) in [netty/netty#16808](https://redirect.github.com/netty/netty/pull/16808)
> * Auto-port 4.2: SingleThreadEventExecutor: document Throwable safety contract on run() by [`@​netty-project-bot`](https://github.com/netty-project-bot) in [netty/netty#16909](https://redirect.github.com/netty/netty/pull/16909)
> * Auto-port 4.2: Make HTTP/2 frame hashCode consistent with equals by [`@​netty-project-bot`](https://github.com/netty-project-bot) in [netty/netty#16910](https://redirect.github.com/netty/netty/pull/16910)
> * Auto-port 4.2: MQTT: Make the decodeProperties early-REPLAY check actually fire by [`@​netty-project-bot`](https://github.com/netty-project-bot) in [netty/netty#16919](https://redirect.github.com/netty/netty/pull/16919)
> * IoUring: fix io\_uring datagram writes with non-zero readerIndex by [`@​dreamlike-ocean`](https://github.com/dreamlike-ocean) in [netty/netty#16905](https://redirect.github.com/netty/netty/pull/16905)
> * Exclude internal events from IoHandler.run() return value in epoll, io\_uring and kqueue by [`@​franz1981`](https://github.com/franz1981) in [netty/netty#16848](https://redirect.github.com/netty/netty/pull/16848)
> * IoUring: Pass IORING\_ENTER\_NO\_IOWAIT to report accurate CPU usage by [`@​wineway`](https://github.com/wineway) in [netty/netty#16739](https://redirect.github.com/netty/netty/pull/16739)
> * Avoid logging exceptions that tests ignore by [`@​chrisvest`](https://github.com/chrisvest) in [netty/netty#16891](https://redirect.github.com/netty/netty/pull/16891)
> * Reject control characters at the boundary of HTTP method names by [`@​daguimu`](https://github.com/daguimu) in [netty/netty#16723](https://redirect.github.com/netty/netty/pull/16723)
> * IoUring: fix TCP Fast Open initial writes with readerIndex and composites by [`@​dreamlike-ocean`](https://github.com/dreamlike-ocean) in [netty/netty#16929](https://redirect.github.com/netty/netty/pull/16929)
> * Try to fix/stabilize a number of flaky tests by [`@​chrisvest`](https://github.com/chrisvest) in [netty/netty#16934](https://redirect.github.com/netty/netty/pull/16934)
> * Fix propagation of startTls for client SslContext handlers by [`@​skyguard1`](https://github.com/skyguard1) in [netty/netty#16931](https://redirect.github.com/netty/netty/pull/16931)
> * Update to latest tcnative release by [`@​normanmaurer`](https://github.com/normanmaurer) in [netty/netty#16936](https://redirect.github.com/netty/netty/pull/16936)
> * Move test to shared testsuite by [`@​normanmaurer`](https://github.com/normanmaurer) in [netty/netty#16928](https://redirect.github.com/netty/netty/pull/16928)
> * [Refactor] Useful helper method getOrDefault & cleaner abstraction by [`@​sanjomo`](https://github.com/sanjomo) in [netty/netty#16927](https://redirect.github.com/netty/netty/pull/16927)
> * Make permessage-deflate server window size and memLevel configurable by [`@​fru1tworld`](https://github.com/fru1tworld) in [netty/netty#16809](https://redirect.github.com/netty/netty/pull/16809)
> * Return early in DnsQueryContext.writeQuery when the query ID space is exhausted by [`@​HwangRock`](https://github.com/HwangRock) in [netty/netty#16950](https://redirect.github.com/netty/netty/pull/16950)
> * Fix HTTP 2 PUSH\_PROMISE stream association validation by [`@​skyguard1`](https://github.com/skyguard1) in [netty/netty#16952](https://redirect.github.com/netty/netty/pull/16952)
> * Fix GZIP FEXTRA extra-field handling in JdkZlibDecoder by [`@​daguimu`](https://github.com/daguimu) in [netty/netty#16951](https://redirect.github.com/netty/netty/pull/16951)
> * Http3FrameCodec handle fragmented payloads when skipping unknown frames by [`@​skyguard1`](https://github.com/skyguard1) in [netty/netty#16960](https://redirect.github.com/netty/netty/pull/16960)
> * Add opt-in validation of mandatory pseudo-header fields for HTTP/2 by [`@​hyperxpro`](https://github.com/hyperxpro) in [netty/netty#16932](https://redirect.github.com/netty/netty/pull/16932)
> * Strictly validate MQTT UTF-8 Encoded String by [`@​skyguard1`](https://github.com/skyguard1) in [netty/netty#16939](https://redirect.github.com/netty/netty/pull/16939)
> * Stop DateFormatter trailing token from running past the parse end by [`@​daguimu`](https://github.com/daguimu) in [netty/netty#16958](https://redirect.github.com/netty/netty/pull/16958)
> * IpFilter: Deprecate constructor which use accept by default by [`@​normanmaurer`](https://github.com/normanmaurer) in [netty/netty#16961](https://redirect.github.com/netty/netty/pull/16961)
> * Add RFC 10008 QUERY Method support by [`@​desiderantes`](https://github.com/desiderantes) in [netty/netty#16966](https://redirect.github.com/netty/netty/pull/16966)
> * Correctly release and fail queued traffic-shaping writes on close by [`@​skyguard1`](https://github.com/skyguard1) in [netty/netty#16959](https://redirect.github.com/netty/netty/pull/16959)
> * Reject control characters at the boundary of the HTTP version token by [`@​HwangRock`](https://github.com/HwangRock) in [netty/netty#16971](https://redirect.github.com/netty/netty/pull/16971)
> * FlowControlHandler: respect auto-read when toggled while dequeueing by [`@​schiemon`](https://github.com/schiemon) in [netty/netty#16949](https://redirect.github.com/netty/netty/pull/16949)
> * Fix leak in ReferenceCountedOpenSslEngine.addCredential by [`@​jmcrawford45`](https://github.com/jmcrawford45) in [netty/netty#16979](https://redirect.github.com/netty/netty/pull/16979)
> * IdleStateHandler: reset firstWriter/ReaderIdleEvent in resetWriteTimeout/resetReadTimeout by [`@​husseinvr97`](https://github.com/husseinvr97) in [netty/netty#16982](https://redirect.github.com/netty/netty/pull/16982)
> * Fix typo in AbstractSniHandler Javadoc by [`@​coderbruis`](https://github.com/coderbruis) in [netty/netty#16988](https://redirect.github.com/netty/netty/pull/16988)
> * Fix client/server inconsistency in SslCredential support matrix by [`@​jmcrawford45`](https://github.com/jmcrawford45) in [netty/netty#16990](https://redirect.github.com/netty/netty/pull/16990)
> * Reconcile `AbstractCoalescingBufferQueue` readableBytes when it drains, and fail stuck HTTP/2 streams instead of spinning empty DATA frames by [`@​gavinbunney`](https://github.com/gavinbunney) in [netty/netty#16947](https://redirect.github.com/netty/netty/pull/16947)
> * Use Ticker in Http2MaxRstFrameListener for testability by [`@​skyguard1`](https://github.com/skyguard1) in [netty/netty#16993](https://redirect.github.com/netty/netty/pull/16993)
> * Reset UTF-8 decode state on CR in StompSubframeDecoder by [`@​vasiliy-mikhailov`](https://github.com/vasiliy-mikhailov) in [netty/netty#16991](https://redirect.github.com/netty/netty/pull/16991)
> * FastLz: Guard decompression against truncated input by [`@​yawkat`](https://github.com/yawkat) in [netty/netty#17000](https://redirect.github.com/netty/netty/pull/17000)
> * Reject non-token characters in HTTP/2 header names by [`@​daguimu`](https://github.com/daguimu) in [netty/netty#16762](https://redirect.github.com/netty/netty/pull/16762)
> * Auto-port 4.2: Fix SelfSignCertificate initialization in tests by [`@​netty-project-bot`](https://github.com/netty-project-bot) in [netty/netty#17029](https://redirect.github.com/netty/netty/pull/17029)
> * Enable extension of Http3ClientConnectionHandler to support higher-level protocols such as WebTransport. by [`@​sanjomo`](https://github.com/sanjomo) in [netty/netty#17027](https://redirect.github.com/netty/netty/pull/17027)
> * Implement Adaptive Cumulator by [`@​shivaspeaks`](https://github.com/shivaspeaks) in [netty/netty#16731](https://redirect.github.com/netty/netty/pull/16731)
> * Allow WebSocket extension negotiation to be disabled per response by [`@​mkurz`](https://github.com/mkurz) in [netty/netty#17030](https://redirect.github.com/netty/netty/pull/17030)
> * Support QPACK sensitivity detector for Never Indexed header fields by [`@​skyguard1`](https://github.com/skyguard1) in [netty/netty#17026](https://redirect.github.com/netty/netty/pull/17026)
> * Fix maxAllocation for brotli-encoded content in HttpContentDecompressor by [`@​skyguard1`](https://github.com/skyguard1) in [netty/netty#17037](https://redirect.github.com/netty/netty/pull/17037)
> * Pin github actions to reduce risk by [`@​normanmaurer`](https://github.com/normanmaurer) in [netty/netty#17043](https://redirect.github.com/netty/netty/pull/17043)

... (truncated)


Commits

* [`3703d79`](netty/netty@3703d79) [maven-release-plugin] prepare release netty-4.2.16.Final
* [`63bbb2c`](netty/netty@63bbb2c) Update rust toolchain - add required parameters
* [`ac06c1b`](netty/netty@ac06c1b) Update rust toolchain
* [`5b68c61`](netty/netty@5b68c61) Merge branches from forks ([#17063](https://redirect.github.com/netty/netty/issues/17063))
* [`de5d276`](netty/netty@de5d276) Update lz4-java to 1.11.1 ([#17061](https://redirect.github.com/netty/netty/issues/17061))
* [`da22048`](netty/netty@da22048) Pin github actions to reduce risk ([#17043](https://redirect.github.com/netty/netty/issues/17043))
* [`0332676`](netty/netty@0332676) Fix maxAllocation for brotli-encoded content in HttpContentDecompressor ([#17037](https://redirect.github.com/netty/netty/issues/17037))
* [`7364401`](netty/netty@7364401) Support QPACK sensitivity detector for Never Indexed header fields ([#17026](https://redirect.github.com/netty/netty/issues/17026))
* [`06faf18`](netty/netty@06faf18) Allow WebSocket extension negotiation to be disabled per response ([#17030](https://redirect.github.com/netty/netty/issues/17030))
* [`bc4b983`](netty/netty@bc4b983) Implement Adaptive Cumulator ([#16731](https://redirect.github.com/netty/netty/issues/16731))
* Additional commits viewable in [compare view](netty/netty@netty-4.2.15.Final...netty-4.2.16.Final)
  
Updates `io.netty:netty-handler` from 4.2.15.Final to 4.2.16.Final
Release notes

*Sourced from [io.netty:netty-handler's releases](https://github.com/netty/netty/releases).*

> netty-4.2.16.Final
> ------------------
>
> What's Changed
> --------------
>
> * Document Java 9 requirement for io\_uring by [`@​jchambers`](https://github.com/jchambers) in [netty/netty#16904](https://redirect.github.com/netty/netty/pull/16904)
> * Add BlockHound exception for DnsQueryIdSpace by [`@​violetagg`](https://github.com/violetagg) in [netty/netty#16896](https://redirect.github.com/netty/netty/pull/16896)
> * Fix incorrect bounds in error message of HpackDecoder.setMaxHeaderListSize by [`@​skyguard1`](https://github.com/skyguard1) in [netty/netty#16901](https://redirect.github.com/netty/netty/pull/16901)
> * Add epoch-based chunk cache purge with ring buffer for thread-local reuse by [`@​franz1981`](https://github.com/franz1981) in [netty/netty#16766](https://redirect.github.com/netty/netty/pull/16766)
> * Use Splittable/ThreadLocalRandom to generate bulk data in tests by [`@​chrisvest`](https://github.com/chrisvest) in [netty/netty#16808](https://redirect.github.com/netty/netty/pull/16808)
> * Auto-port 4.2: SingleThreadEventExecutor: document Throwable safety contract on run() by [`@​netty-project-bot`](https://github.com/netty-project-bot) in [netty/netty#16909](https://redirect.github.com/netty/netty/pull/16909)
> * Auto-port 4.2: Make HTTP/2 frame hashCode consistent with equals by [`@​netty-project-bot`](https://github.com/netty-project-bot) in [netty/netty#16910](https://redirect.github.com/netty/netty/pull/16910)
> * Auto-port 4.2: MQTT: Make the decodeProperties early-REPLAY check actually fire by [`@​netty-project-bot`](https://github.com/netty-project-bot) in [netty/netty#16919](https://redirect.github.com/netty/netty/pull/16919)
> * IoUring: fix io\_uring datagram writes with non-zero readerIndex by [`@​dreamlike-ocean`](https://github.com/dreamlike-ocean) in [netty/netty#16905](https://redirect.github.com/netty/netty/pull/16905)
> * Exclude internal events from IoHandler.run() return value in epoll, io\_uring and kqueue by [`@​franz1981`](https://github.com/franz1981) in [netty/netty#16848](https://redirect.github.com/netty/netty/pull/16848)
> * IoUring: Pass IORING\_ENTER\_NO\_IOWAIT to report accurate CPU usage by [`@​wineway`](https://github.com/wineway) in [netty/netty#16739](https://redirect.github.com/netty/netty/pull/16739)
> * Avoid logging exceptions that tests ignore by [`@​chrisvest`](https://github.com/chrisvest) in [netty/netty#16891](https://redirect.github.com/netty/netty/pull/16891)
> * Reject control characters at the boundary of HTTP method names by [`@​daguimu`](https://github.com/daguimu) in [netty/netty#16723](https://redirect.github.com/netty/netty/pull/16723)
> * IoUring: fix TCP Fast Open initial writes with readerIndex and composites by [`@​dreamlike-ocean`](https://github.com/dreamlike-ocean) in [netty/netty#16929](https://redirect.github.com/netty/netty/pull/16929)
> * Try to fix/stabilize a number of flaky tests by [`@​chrisvest`](https://github.com/chrisvest) in [netty/netty#16934](https://redirect.github.com/netty/netty/pull/16934)
> * Fix propagation of startTls for client SslContext handlers by [`@​skyguard1`](https://github.com/skyguard1) in [netty/netty#16931](https://redirect.github.com/netty/netty/pull/16931)
> * Update to latest tcnative release by [`@​normanmaurer`](https://github.com/normanmaurer) in [netty/netty#16936](https://redirect.github.com/netty/netty/pull/16936)
> * Move test to shared testsuite by [`@​normanmaurer`](https://github.com/normanmaurer) in [netty/netty#16928](https://redirect.github.com/netty/netty/pull/16928)
> * [Refactor] Useful helper method getOrDefault & cleaner abstraction by [`@​sanjomo`](https://github.com/sanjomo) in [netty/netty#16927](https://redirect.github.com/netty/netty/pull/16927)
> * Make permessage-deflate server window size and memLevel configurable by [`@​fru1tworld`](https://github.com/fru1tworld) in [netty/netty#16809](https://redirect.github.com/netty/netty/pull/16809)
> * Return early in DnsQueryContext.writeQuery when the query ID space is exhausted by [`@​HwangRock`](https://github.com/HwangRock) in [netty/netty#16950](https://redirect.github.com/netty/netty/pull/16950)
> * Fix HTTP 2 PUSH\_PROMISE stream association validation by [`@​skyguard1`](https://github.com/skyguard1) in [netty/netty#16952](https://redirect.github.com/netty/netty/pull/16952)
> * Fix GZIP FEXTRA extra-field handling in JdkZlibDecoder by [`@​daguimu`](https://github.com/daguimu) in [netty/netty#16951](https://redirect.github.com/netty/netty/pull/16951)
> * Http3FrameCodec handle fragmented payloads when skipping unknown frames by [`@​skyguard1`](https://github.com/skyguard1) in [netty/netty#16960](https://redirect.github.com/netty/netty/pull/16960)
> * Add opt-in validation of mandatory pseudo-header fields for HTTP/2 by [`@​hyperxpro`](https://github.com/hyperxpro) in [netty/netty#16932](https://redirect.github.com/netty/netty/pull/16932)
> * Strictly validate MQTT UTF-8 Encoded String by [`@​skyguard1`](https://github.com/skyguard1) in [netty/netty#16939](https://redirect.github.com/netty/netty/pull/16939)
> * Stop DateFormatter trailing token from running past the parse end by [`@​daguimu`](https://github.com/daguimu) in [netty/netty#16958](https://redirect.github.com/netty/netty/pull/16958)
> * IpFilter: Deprecate constructor which use accept by default by [`@​normanmaurer`](https://github.com/normanmaurer) in [netty/netty#16961](https://redirect.github.com/netty/netty/pull/16961)
> * Add RFC 10008 QUERY Method support by [`@​desiderantes`](https://github.com/desiderantes) in [netty/netty#16966](https://redirect.github.com/netty/netty/pull/16966)
> * Correctly release and fail queued traffic-shaping writes on close by [`@​skyguard1`](https://github.com/skyguard1) in [netty/netty#16959](https://redirect.github.com/netty/netty/pull/16959)
> * Reject control characters at the boundary of the HTTP version token by [`@​HwangRock`](https://github.com/HwangRock) in [netty/netty#16971](https://redirect.github.com/netty/netty/pull/16971)
> * FlowControlHandler: respect auto-read when toggled while dequeueing by [`@​schiemon`](https://github.com/schiemon) in [netty/netty#16949](https://redirect.github.com/netty/netty/pull/16949)
> * Fix leak in ReferenceCountedOpenSslEngine.addCredential by [`@​jmcrawford45`](https://github.com/jmcrawford45) in [netty/netty#16979](https://redirect.github.com/netty/netty/pull/16979)
> * IdleStateHandler: reset firstWriter/ReaderIdleEvent in resetWriteTimeout/resetReadTimeout by [`@​husseinvr97`](https://github.com/husseinvr97) in [netty/netty#16982](https://redirect.github.com/netty/netty/pull/16982)
> * Fix typo in AbstractSniHandler Javadoc by [`@​coderbruis`](https://github.com/coderbruis) in [netty/netty#16988](https://redirect.github.com/netty/netty/pull/16988)
> * Fix client/server inconsistency in SslCredential support matrix by [`@​jmcrawford45`](https://github.com/jmcrawford45) in [netty/netty#16990](https://redirect.github.com/netty/netty/pull/16990)
> * Reconcile `AbstractCoalescingBufferQueue` readableBytes when it drains, and fail stuck HTTP/2 streams instead of spinning empty DATA frames by [`@​gavinbunney`](https://github.com/gavinbunney) in [netty/netty#16947](https://redirect.github.com/netty/netty/pull/16947)
> * Use Ticker in Http2MaxRstFrameListener for testability by [`@​skyguard1`](https://github.com/skyguard1) in [netty/netty#16993](https://redirect.github.com/netty/netty/pull/16993)
> * Reset UTF-8 decode state on CR in StompSubframeDecoder by [`@​vasiliy-mikhailov`](https://github.com/vasiliy-mikhailov) in [netty/netty#16991](https://redirect.github.com/netty/netty/pull/16991)
> * FastLz: Guard decompression against truncated input by [`@​yawkat`](https://github.com/yawkat) in [netty/netty#17000](https://redirect.github.com/netty/netty/pull/17000)
> * Reject non-token characters in HTTP/2 header names by [`@​daguimu`](https://github.com/daguimu) in [netty/netty#16762](https://redirect.github.com/netty/netty/pull/16762)
> * Auto-port 4.2: Fix SelfSignCertificate initialization in tests by [`@​netty-project-bot`](https://github.com/netty-project-bot) in [netty/netty#17029](https://redirect.github.com/netty/netty/pull/17029)
> * Enable extension of Http3ClientConnectionHandler to support higher-level protocols such as WebTransport. by [`@​sanjomo`](https://github.com/sanjomo) in [netty/netty#17027](https://redirect.github.com/netty/netty/pull/17027)
> * Implement Adaptive Cumulator by [`@​shivaspeaks`](https://github.com/shivaspeaks) in [netty/netty#16731](https://redirect.github.com/netty/netty/pull/16731)
> * Allow WebSocket extension negotiation to be disabled per response by [`@​mkurz`](https://github.com/mkurz) in [netty/netty#17030](https://redirect.github.com/netty/netty/pull/17030)
> * Support QPACK sensitivity detector for Never Indexed header fields by [`@​skyguard1`](https://github.com/skyguard1) in [netty/netty#17026](https://redirect.github.com/netty/netty/pull/17026)
> * Fix maxAllocation for brotli-encoded content in HttpContentDecompressor by [`@​skyguard1`](https://github.com/skyguard1) in [netty/netty#17037](https://redirect.github.com/netty/netty/pull/17037)
> * Pin github actions to reduce risk by [`@​normanmaurer`](https://github.com/normanmaurer) in [netty/netty#17043](https://redirect.github.com/netty/netty/pull/17043)

... (truncated)


Commits

* [`3703d79`](netty/netty@3703d79) [maven-release-plugin] prepare release netty-4.2.16.Final
* [`63bbb2c`](netty/netty@63bbb2c) Update rust toolchain - add required parameters
* [`ac06c1b`](netty/netty@ac06c1b) Update rust toolchain
* [`5b68c61`](netty/netty@5b68c61) Merge branches from forks ([#17063](https://redirect.github.com/netty/netty/issues/17063))
* [`de5d276`](netty/netty@de5d276) Update lz4-java to 1.11.1 ([#17061](https://redirect.github.com/netty/netty/issues/17061))
* [`da22048`](netty/netty@da22048) Pin github actions to reduce risk ([#17043](https://redirect.github.com/netty/netty/issues/17043))
* [`0332676`](netty/netty@0332676) Fix maxAllocation for brotli-encoded content in HttpContentDecompressor ([#17037](https://redirect.github.com/netty/netty/issues/17037))
* [`7364401`](netty/netty@7364401) Support QPACK sensitivity detector for Never Indexed header fields ([#17026](https://redirect.github.com/netty/netty/issues/17026))
* [`06faf18`](netty/netty@06faf18) Allow WebSocket extension negotiation to be disabled per response ([#17030](https://redirect.github.com/netty/netty/issues/17030))
* [`bc4b983`](netty/netty@bc4b983) Implement Adaptive Cumulator ([#16731](https://redirect.github.com/netty/netty/issues/16731))
* Additional commits viewable in [compare view](netty/netty@netty-4.2.15.Final...netty-4.2.16.Final)
  
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@franz1981 franz1981 mentioned this pull request Jul 17, 2026
Open
@franz1981 franz1981 mentioned this pull request Jul 28, 2026
Merged
franz1981 added a commit to franz1981/netty that referenced this pull request Jul 28, 2026
@franz1981
Fix direct memory OOM on low-core containers
cff755d 
Motivation:

PR netty#16766 introduced SHARED_CACHE_CAPACITY = max(128, CHUNK_REUSE_QUEUE * 2)
to prevent chunk churn. On 1-core containers where CHUNK_REUSE_QUEUE is 2,
the 128-slot floor allows each of the 16 size classes to retain up to 128
chunks of ~128 KB, totalling 256 MB of direct memory in caches alone.

On JDK 21 without -Dio.netty.tryReflectionSetAccessible=true, Netty
allocates direct chunks via ByteBuffer.allocateDirect(), tracked against
MaxDirectMemorySize. The cache capacity can exhaust the entire direct
memory budget, causing OOM as reported in netty#17107.

Additionally, IS_LOW_MEM (triggered when Runtime.maxMemory() <= 512 MB)
uses heap budget as a proxy for native memory availability, which is wrong
for off-heap workloads. There is no override for users who know their
environment better than the heuristic.

On small queues, scanForCapacitySlow could pick a condemned chunk (past
purge threshold) as fallback and reset its epoch to 0, making it immortal.
The retention floor kept condemned chunks in the queue; scan kept resetting
their epoch before purge could evict them.

Modification:

- Reduce the SHARED_CACHE_CAPACITY floor from 128 to 16.
- Add io.netty.allocator.lowMemory system property to override IS_LOW_MEM
  auto-detection, following the precedent of the existing
  disableThreadLocalMagazinesOnLowMemory property.
- In scanForCapacitySlow, cap epoch to CHUNK_PURGE_THRESHOLD (not 0) for
  chunks at or past the threshold. Below-threshold chunks still reset to 0
  (active-chunk protection). Capped chunks reach threshold+1 after one
  purge cycle, entering the deferred eviction pipeline. If above the
  retention floor they are evicted; if at the floor they are re-offered
  and re-enter the pipeline next cycle. Cache utilization is preserved —
  all chunks remain eligible as scan fallback regardless of epoch.

Result:

Worst-case cache retention drops from 256 MB to 32 MB on 1-4 core machines.
The CHUNK_REUSE_QUEUE * 2 formula still governs on 8+ cores (same as
before). The floor of 16 is 8x the pre-netty#16766 capacity on 1-core, so
the original chunk churn problem does not regress. Users can force
IS_LOW_MEM on or off via -Dio.netty.allocator.lowMemory. Condemned chunks
converge to eviction while remaining usable by scan, preserving both cache
utilization and the retention floor.
franz1981 added a commit to franz1981/netty that referenced this pull request Jul 29, 2026
@franz1981
Fix direct memory OOM on low-core containers
74776e3 
Motivation:

PR netty#16766 introduced SHARED_CACHE_CAPACITY = max(128, CHUNK_REUSE_QUEUE * 2)
to prevent chunk churn. On 1-core containers where CHUNK_REUSE_QUEUE is 2,
the 128-slot floor allows each of the 16 size classes to retain up to 128
chunks of ~128 KB, totalling 256 MB of direct memory in caches alone.

On JDK 21 without -Dio.netty.tryReflectionSetAccessible=true, Netty
allocates direct chunks via ByteBuffer.allocateDirect(), tracked against
MaxDirectMemorySize. The cache capacity can exhaust the entire direct
memory budget, causing OOM as reported in netty#17107.

Additionally, IS_LOW_MEM (triggered when Runtime.maxMemory() <= 512 MB)
uses heap budget as a proxy for native memory availability, which is wrong
for off-heap workloads. There is no override for users who know their
environment better than the heuristic.

Modification:

- Reduce the SHARED_CACHE_CAPACITY floor from 128 to 16.
- Add io.netty.allocator.lowMemory system property to override IS_LOW_MEM
  auto-detection, following the precedent of the existing
  disableThreadLocalMagazinesOnLowMemory property.
- Fix cacheSettlesAfterBurstShared test to cap excess chunks within
  SHARED_CACHE_CAPACITY, preventing silent drops on the bounded MPMC queue
  when CHUNK_REUSE_QUEUE is large relative to the capacity floor.

Result:

Worst-case cache retention drops from 256 MB to 32 MB on 1-4 core machines.
The CHUNK_REUSE_QUEUE * 2 formula still governs on 8+ cores (same as
before). The floor of 16 is 8x the pre-netty#16766 capacity on 1-core, so
the original chunk churn problem does not regress. Users can force
IS_LOW_MEM on or off via -Dio.netty.allocator.lowMemory.
franz1981 added a commit to franz1981/netty that referenced this pull request Jul 29, 2026
@franz1981
Fix direct memory OOM on low-core containers
cc1fdf1 
Motivation:

PR netty#16766 introduced SHARED_CACHE_CAPACITY = max(128, CHUNK_REUSE_QUEUE * 2)
to prevent chunk churn. On 1-core containers where CHUNK_REUSE_QUEUE is 2,
the 128-slot floor allows each of the 16 size classes to retain up to 128
chunks of ~128 KB, totalling 256 MB of direct memory in caches alone.

On JDK 21 without -Dio.netty.tryReflectionSetAccessible=true, Netty
allocates direct chunks via ByteBuffer.allocateDirect(), tracked against
MaxDirectMemorySize. The cache capacity can exhaust the entire direct
memory budget, causing OOM as reported in netty#17107.

Additionally, IS_LOW_MEM (triggered when Runtime.maxMemory() <= 512 MB)
uses heap budget as a proxy for native memory availability, which is wrong
for off-heap workloads. There is no override for users who know their
environment better than the heuristic.

Modification:

- Reduce the SHARED_CACHE_CAPACITY floor from 128 to 16.
- Add io.netty.allocator.lowMemory system property to override IS_LOW_MEM
  auto-detection, following the precedent of the existing
  disableThreadLocalMagazinesOnLowMemory property.
- Fix cacheSettlesAfterBurstShared test to cap excess chunks within
  SHARED_CACHE_CAPACITY, preventing silent drops on the bounded MPMC queue
  when CHUNK_REUSE_QUEUE is large relative to the capacity floor.

Result:

Worst-case cache retention drops from 256 MB to 32 MB on 1-4 core machines.
The CHUNK_REUSE_QUEUE * 2 formula still governs on 8+ cores (same as
before). The floor of 16 is 8x the pre-netty#16766 capacity on 1-core, so
the original chunk churn problem does not regress. Users can force
IS_LOW_MEM on or off via -Dio.netty.allocator.lowMemory.
@franz1981 franz1981 mentioned this pull request Jul 31, 2026
Closed
franz1981 added a commit to franz1981/netty that referenced this pull request Jul 31, 2026
@franz1981
Fix direct memory OOM on low-core containers
1b83f89 
Motivation:

PR netty#16766 introduced SHARED_CACHE_CAPACITY = max(128, CHUNK_REUSE_QUEUE * 2)
to prevent chunk churn. On 1-core containers where CHUNK_REUSE_QUEUE is 2,
the 128-slot floor allows each of the 16 size classes to retain up to 128
chunks of ~128 KB, totalling 256 MB of direct memory in caches alone.

On JDK 21 without -Dio.netty.tryReflectionSetAccessible=true, Netty
allocates direct chunks via ByteBuffer.allocateDirect(), tracked against
MaxDirectMemorySize. The cache capacity can exhaust the entire direct
memory budget, causing OOM as reported in netty#17107.

Additionally, IS_LOW_MEM (triggered when Runtime.maxMemory() <= 512 MB)
uses heap budget as a proxy for native memory availability, which is wrong
for off-heap workloads. There is no override for users who know their
environment better than the heuristic.

Modification:

- Reduce the SHARED_CACHE_CAPACITY floor from 128 to 16.
- Add io.netty.allocator.lowMemory system property to override IS_LOW_MEM
  auto-detection, following the precedent of the existing
  disableThreadLocalMagazinesOnLowMemory property.
- Fix cacheSettlesAfterBurstShared test to cap excess chunks within
  SHARED_CACHE_CAPACITY, preventing silent drops on the bounded MPMC queue
  when CHUNK_REUSE_QUEUE is large relative to the capacity floor.

Result:

Worst-case cache retention drops from 256 MB to 32 MB on 1-4 core machines.
The CHUNK_REUSE_QUEUE * 2 formula still governs on 8+ cores (same as
before). The floor of 16 is 8x the pre-netty#16766 capacity on 1-core, so
the original chunk churn problem does not regress. Users can force
IS_LOW_MEM on or off via -Dio.netty.allocator.lowMemory.
chrisvest added a commit that referenced this pull request Aug 2, 2026
@franz1981 @chrisvest
Fix direct memory OOM on low-core containers (#17166)
6b02a3e 
Motivation:

PR #16766 introduced SHARED_CACHE_CAPACITY = max(128, CHUNK_REUSE_QUEUE
* 2) to prevent chunk churn. On 1-core containers where
CHUNK_REUSE_QUEUE is 2, the 128-slot floor allows each of the 16 size
classes to retain up to 128 chunks of ~128 KB, totalling 256 MB of
direct memory in caches alone.

On JDK 21 without -Dio.netty.tryReflectionSetAccessible=true, Netty
allocates direct chunks via ByteBuffer.allocateDirect(), tracked against
MaxDirectMemorySize. The cache capacity can exhaust the entire direct
memory budget, causing OOM as reported in #17107.

Additionally, IS_LOW_MEM (triggered when Runtime.maxMemory() <= 512 MB)
uses heap budget as a proxy for native memory availability, which is
wrong for off-heap workloads. There is no override for users who know
their environment better than the heuristic.

Modification:

- Reduce the SHARED_CACHE_CAPACITY floor from 128 to 16.
- Add io.netty.allocator.lowMemory system property to override
IS_LOW_MEM auto-detection, following the precedent of the existing
disableThreadLocalMagazinesOnLowMemory property.

Result:

Worst-case cache retention drops from 256 MB to 32 MB on 1-4 core
machines. The CHUNK_REUSE_QUEUE * 2 formula still governs on 8+ cores
(128 on 32 cores — same as before). The floor of 16 is 8x the pre-#16766
capacity on 1-core, so the original chunk churn problem does not
regress. Users can force IS_LOW_MEM on or off via
-Dio.netty.allocator.lowMemory.

---------

Co-authored-by: Chris Vest <[email protected]>
@netty-project-bot netty-project-bot mentioned this pull request Aug 2, 2026
Merged
normanmaurer pushed a commit that referenced this pull request Aug 3, 2026
@netty-project-bot @franz1981 @chrisvest
Auto-port 5.0: Fix direct memory OOM on low-core containers (#17188)
126a1ef 
Auto-port of #17166 to 5.0
Cherry-picked commit: 6b02a3e

---
Motivation:

PR #16766 introduced SHARED_CACHE_CAPACITY = max(128, CHUNK_REUSE_QUEUE
* 2) to prevent chunk churn. On 1-core containers where
CHUNK_REUSE_QUEUE is 2, the 128-slot floor allows each of the 16 size
classes to retain up to 128 chunks of ~128 KB, totalling 256 MB of
direct memory in caches alone.

On JDK 21 without -Dio.netty.tryReflectionSetAccessible=true, Netty
allocates direct chunks via ByteBuffer.allocateDirect(), tracked against
MaxDirectMemorySize. The cache capacity can exhaust the entire direct
memory budget, causing OOM as reported in #17107.

Additionally, IS_LOW_MEM (triggered when Runtime.maxMemory() <= 512 MB)
uses heap budget as a proxy for native memory availability, which is
wrong for off-heap workloads. There is no override for users who know
their environment better than the heuristic.

Modification:

- Reduce the SHARED_CACHE_CAPACITY floor from 128 to 16.
- Add io.netty.allocator.lowMemory system property to override
IS_LOW_MEM auto-detection, following the precedent of the existing
disableThreadLocalMagazinesOnLowMemory property.

Result:

Worst-case cache retention drops from 256 MB to 32 MB on 1-4 core
machines. The CHUNK_REUSE_QUEUE * 2 formula still governs on 8+ cores
(128 on 32 cores — same as before). The floor of 16 is 8x the pre-#16766
capacity on 1-core, so the original chunk churn problem does not
regress. Users can force IS_LOW_MEM on or off via
-Dio.netty.allocator.lowMemory.

Co-authored-by: Francesco Nigro <[email protected]>
Co-authored-by: Chris Vest <[email protected]>
@chrisvest chrisvest added the needs-cherry-pick-4.1 This PR should be cherry-picked to 4.1 once merged. label Aug 3, 2026
@netty-project-bot

netty-project-bot commented Aug 3, 2026

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Could not create auto-port PR.
Got conflicts when cherry-picking onto 4.1.

@chrisvest chrisvest removed the needs-cherry-pick-4.1 This PR should be cherry-picked to 4.1 once merged. label Aug 4, 2026
@chrisvest chrisvest mentioned this pull request Aug 4, 2026
Merged
normanmaurer pushed a commit that referenced this pull request Aug 4, 2026
@chrisvest @franz1981
Adaptive allocator backports (#17206)
b8a40d2 
Backport #16766 and
#17166 to 4.1

---------

Co-authored-by: Francesco Nigro <[email protected]>
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