Investigate flaky parallel/test-dgram-multicast-set-interface

[joyeecheung]

• Version: master
• Platform: windows, arm(?)
• Subsystem: dgram

Looks like under certain circumstances none of the 'listening' handler is triggered.
https://ci.nodejs.org/job/node-test-binary-windows/COMPILED_BY=vs2015,RUNNER=win2016,RUN_SUBSET=0/14231/console

not ok 62 parallel/test-dgram-multicast-set-interface
  ---
  duration_ms: 0.177
  severity: fail
  stack: |-
    1..0 # Skipped: Skipping udp6 tests, no IPv6 support.
    Mismatched <anonymous> function calls. Expected exactly 1, actual 0.
        at Object.exports.mustCall (c:\workspace\node-test-binary-windows\test\common\index.js:428:10)
        at Object.<anonymous> (c:\workspace\node-test-binary-windows\test\parallel\test-dgram-multicast-set-interface.js:10:33)
        at Module._compile (module.js:570:32)
        at Object.Module._extensions..js (module.js:579:10)
        at Module.load (module.js:487:32)
        at tryModuleLoad (module.js:446:12)
        at Function.Module._load (module.js:438:3)
        at Module.runMain (module.js:604:10)
        at run (bootstrap_node.js:383:7)
    Mismatched <anonymous> function calls. Expected exactly 1, actual 0.
        at Object.exports.mustCall (c:\workspace\node-test-binary-windows\test\common\index.js:428:10)
        at Object.<anonymous> (c:\workspace\node-test-binary-windows\test\parallel\test-dgram-multicast-set-interface.js:22:33)
        at Module._compile (module.js:570:32)
        at Object.Module._extensions..js (module.js:579:10)
        at Module.load (module.js:487:32)
        at tryModuleLoad (module.js:446:12)
        at Function.Module._load (module.js:438:3)
        at Module.runMain (module.js:604:10)
        at run (bootstrap_node.js:383:7)
    Mismatched <anonymous> function calls. Expected exactly 1, actual 0.
        at Object.exports.mustCall (c:\workspace\node-test-binary-windows\test\common\index.js:428:10)
        at Object.<anonymous> (c:\workspace\node-test-binary-windows\test\parallel\test-dgram-multicast-set-interface.js:34:33)
        at Module._compile (module.js:570:32)
        at Object.Module._extensions..js (module.js:579:10)
        at Module.load (module.js:487:32)
        at tryModuleLoad (module.js:446:12)
        at Function.Module._load (module.js:438:3)
        at Module.runMain (module.js:604:10)
        at run (bootstrap_node.js:383:7)
    Mismatched <anonymous> function calls. Expected exactly 1, actual 0.
        at Object.exports.mustCall (c:\workspace\node-test-binary-windows\test\common\index.js:428:10)
        at Object.<anonymous> (c:\workspace\node-test-binary-windows\test\parallel\test-dgram-multicast-set-interface.js:51:33)
        at Module._compile (module.js:570:32)
        at Object.Module._extensions..js (module.js:579:10)
        at Module.load (module.js:487:32)
        at tryModuleLoad (module.js:446:12)
        at Function.Module._load (module.js:438:3)
        at Module.runMain (module.js:604:10)
        at run (bootstrap_node.js:383:7)
    Mismatched <anonymous> function calls. Expected exactly 1, actual 0.
        at Object.exports.mustCall (c:\workspace\node-test-binary-windows\test\common\index.js:428:10)
        at Object.<anonymous> (c:\workspace\node-test-binary-windows\test\parallel\test-dgram-multicast-set-interface.js:65:33)
        at Module._compile (module.js:570:32)
        at Object.Module._extensions..js (module.js:579:10)
        at Module.load (module.js:487:32)
        at tryModuleLoad (module.js:446:12)
        at Function.Module._load (module.js:438:3)
        at Module.runMain (module.js:604:10)
        at run (bootstrap_node.js:383:7)
  ...

[joyeecheung]

This was supposed to be fixed by #15421, somehow it managed to come back (this time on Windows, although I think I've also seen it on one of the pis tonight)... cc @cjihrig

[cjihrig]

@joyeecheung it looks like that CI run was started for #13005, which I assume was a v6.x backport. However, the fix in #15421 was marked as do not land on v6.x.

[joyeecheung]

@cjihrig Hmm, I think I somehow misunderstood the transparent icons on https://ci.nodejs.org/job/node-test-binary-windows/14244/ , clicking on the win2016-vs2015 one directed me to the results of another CI run. Sorry for the false alarm. I think this can be closed.