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fix(node): Fixes and improvements to ANR detection #9128

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merged 11 commits into from
Sep 29, 2023

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@timfish timfish commented Sep 27, 2023

This PR:

  • Adds support for pm2 (closes Application Not Responding (ANR) feature breaks use with PM2 #9131)
    • Passes SENTRY_ANR_CHILD_PROCESS environment variable to the child process for reliable child process detection
    • To support cluster mode, process.env.pm_exec_path is used for entryScript over process.argv[1]
      • It's worth noting that in cluster mode, an ANR child process is started for every forked cluster process. If you cluster on 8 cores, this will result in 8 ANR process with roughly 400MB of memory overhead.
  • Changes to use spawn rather than fork since fork in Electron does not run a fully Electron capable node process so we can't get all the required context
  • Disables tracing and session tracking for ANR child process
  • Handles inspector port already in use
    • inspector.open() defaults to port 9229. When inspector.url() returns undefined we now try the next port
  • Improves logging to aid in future debugging of issues

@timfish timfish marked this pull request as draft September 27, 2023 11:10
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@timfish timfish changed the title fix(node): Use spawn rather than fork for ANR fix(node): Fixes and improvements to ANR detection Sep 27, 2023
@timfish timfish marked this pull request as ready for review September 28, 2023 18:20
@AbhiPrasad AbhiPrasad merged commit f22bb15 into getsentry:develop Sep 29, 2023
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@timfish timfish self-assigned this Oct 2, 2023
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Application Not Responding (ANR) feature breaks use with PM2
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