AIX: hang on 4.x run

[mhdawson]

• Version: 4.x
• Platform: AIX
• Subsystem: ?
  Hang on test run on 4.X: https://ci.nodejs.org/job/node-test-commit-aix/1205/nodes=aix61-ppc64/

Looks like on test 1051 ?

  ...
ok 1044 message/timeout_throw
  ---
  duration_ms: 0.153
  ...
ok 1045 message/undefined_reference_in_new_context
  ---
  duration_ms: 0.178
  ...
ok 1046 message/vm_caught_custom_runtime_error
  ---
  duration_ms: 0.168
  ...
ok 1047 message/vm_display_runtime_error
  ---
  duration_ms: 0.182
  ...
ok 1048 message/vm_display_syntax_error
  ---
  duration_ms: 0.169
  ...
ok 1049 message/vm_dont_display_runtime_error
  ---
  duration_ms: 0.154
  ...
ok 1050 message/vm_dont_display_syntax_error
  ---
  duration_ms: 0.175
...

[mhdawson]

Believe this would be intermittent. Run to see if it re-occurs. https://ci.nodejs.org/job/node-test-commit-aix/1207/

[Trott]

The pseudo-tty/no_interleaved_stdio would typically be next. /cc @Fishrock123

[Fishrock123]

probably related to #7973 -- I guess python PTYs must be broken on whatever new version of AIX we started running
¯_(ツ)_/¯

We could just disable it for AIX I guess

[mhdawson]

@gireeshpunathil can you look at this one as part of #7973

[mhdawson]

It if occurs often enough to be an issue before we investigate then we can disable.

[gireeshpunathil]

Attempting to recreate the failure, so far no luck. Trying in few systems.

[gireeshpunathil]

Did not fail on a 10000 batch iterations I tried. Running further.
I see the python connection now, all the tests in messages are run by a python driver. Now trying to see what the driver does to input / output data to the JS tests to make observations related to fake tty or anything new.

[gireeshpunathil]

I am neither able to reproduce this error, nor able to reason it from the test cases or it's driver code. If the python code was at fault, it would affect all the tests in message group, which is not the case here. I am inclined to think this as an environmental issue.

I recommend this issue be closed. If the hangs recur, diagnose from the leads from those failures and progress thereon.

[mhdawson]

@gireeshpunathil agreed. closing.