# nodejsReportSignal

This is an optional argument used with Signal Mode. It tells the yc-360 script which OS signal to send to a Node.js process to trigger its built in diagnostic report, when your application doesn't use Node's default signal.

Type: string

Default: SIGUSR2

Usage:

  • Omitted: the script sends SIGUSR2, matching the default --report-on-signal behavior of Node.js.
  • Specified: the script sends the signal you provide instead. Your application's own --report-on-signal=<SIGNAL> flag must be set to the same value.

How it works:

  1. This argument only applies when nodejsCaptureMode is set to signal.
  2. Both sides, the Node.js application and the yc-360 script, must agree on the same signal for the report to be triggered successfully.
  3. SIGUSR1 isn't supported. Node.js treats it as an inspector activation signal rather than a diagnostic report trigger.
  4. This argument is supported on Linux and macOS only, matching Signal Mode's own platform support.

Example (YAML):

options:
  onlyCapture: true
  appRuntime: nodejs
  nodejsCaptureMode=signal
  nodejsReportSignal=SIGUSR2
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Example (CLI):

./yc -onlyCapture -p 22534 -appRuntime=nodejs -nodejsCaptureMode=signal -nodejsReportSignal=SIGUSR2
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