iOS 17 tests sometimes fail to find Dart VM in CI  #142448

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1. vashworth

   added

   platform-iosiOS applications specificallyiOS applications specifically

   P2Important issues not at the top of the work listImportant issues not at the top of the work list

   team-iosOwned by iOS platform teamOwned by iOS platform team

   triaged-iosTriaged by iOS platform teamTriaged by iOS platform team

   on Jan 29, 2024
2. jmagman commented on Jan 29, 2024

   

   jmagman

   on Jan 29, 2024

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   https://ci.chromium.org/ui/p/flutter/builders/staging/Mac_ios%20microbenchmarks_ios_xcode_debug/2180/overview shows in the uploaded device logs (step 28 log links) that the app is installed:

   Jan 26 23:16:07 installd(MobileSystemServices)[133] <Notice>: 0x16ceef000 -[MIInstaller performInstallationWithError:]: Install Successful for (Developer:com.yourcompany.microbenchmarks); Staging: 0.01s; Waiting: 0.00s; Preflight/Patch: 0.52s, Verifying: 0.07s; Overall: 0.76s
   

   However I don't see the Runner(Flutter) log lines I would expect if it were running:

   On the Mac side for timestamp comparison:

    [2024-01-26 23:15:58.145012] [STDOUT] [STDOUT] [   +2 ms] Application launched on the device. Waiting for Dart VM Service url.
    [2024-01-26 23:15:58.148230] [STDOUT] [STDOUT] [   +3 ms] Checking for advertised Dart VM Services...
    [2024-01-26 23:16:58.148476] [STDOUT] [STDOUT] [        ] No path provided for Symbols directory.
    [2024-01-26 23:25:58.149431] [STDOUT] [STDOUT] [+540020 ms] mDNS query failed. Checking for an interface with a ipv4 link local address.
   

   https://storage.googleapis.com/flutter_logs/flutter/db828a8351dc0057d0a9b0682ccf6094e9ead6c8/microbenchmarks_ios_xcode_debug/34738fab-6412-49d4-ad89-b2a87db7196d/00008030-00062432346B402E.log
3. vashworth commented on Jan 30, 2024

   

   vashworth

   on Jan 30, 2024

   Last edited by vashworth

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   Yeah, it seems like debugserver starts up:

   Jan 26 23:16:08 debugserver[480] <Notice>: debugserver will use ASL for internal logging.
   Jan 26 23:16:08 debugserver[480] <Notice>: debugserver-@(#)PROGRAM:LLDB  PROJECT:lldb-1500.2.8.13
    for arm64.
   Jan 26 23:16:08 debugserver[480] <Notice>: Got a connection, waiting for process information for launching or attaching.
   

   But I didn't see it attach, I would have expected something like this:

   Jan 26 23:11:26 debugserver[470] <Notice>: [LaunchAttach] START 470 vAttach to pid 469
   ...
   Jan 26 23:11:26 debugserver[470] <Notice>: Successfully attached to pid 469
   Jan 26 23:11:26 debugserver[470] <Notice>: Attach succeeded, ready to debug.
   

   I think I'll try uploading DerivedData to the logs to see if we can get the Launch logs from Xcode
4. auto-submit

   added a commit that references this issue on Feb 1, 2024

   Upload DerivedData logs in CI (#142643)

   ...

   e5c286e