Rector fails with: Child process timed out after 120 seconds

[bicpi]

Bug Report

Hi!

Subject	Details
0.13.9	Latest version when issue was observed

On a random basis my Rector runs end with the following error; also with increased memory; it deals with ~1100 classes.

$ ./vendor/bin/rector process --dry-run --memory-limit=1G
...
[ERROR] Could not process "/app/vendor/rector/rector/vendor/symplify/easy-parallel/src/ValueObject/ParallelProcess.php" file, due to:  "Child process timed out after 120 seconds". On line: 103              
  
[ERROR] Could not process some files, due to: "Reached system errors count limit of 50, exiting...". 

Especially when used in CI this lead to failed pipelines.

Minimal PHP Code Causing Issue

PHP Code is up-to-date, all Rector rules were applied and the runs mostly pass without the above error.

Expected Behaviour

It should always finish without error.

[samsonasik]

is increasing timeout seconds help?

$rectorConfig->parallel(240);

or is disable parallel make it working?

$rectorConfig->disableParallel();

[rafaelbernard]

I am experiencing the same. I will try the suggestions.

[rafaelbernard]

Fixed on my end. Increasing the timeout and adjusting the max number of processes to be aligned with the machine running it:

$rectorConfig->parallel(240, 2);

[samsonasik]

@rafaelbernard awesome! That's will be worth mentioning it in the documentation, could you try create PR for documenting how to troubleshoot it? You can create PR to

https://github.com/rectorphp/rector-src/tree/main/build/target-repository/docs

Thank you.

[bicpi]

Thanks everyone for the feedback. For me it was pretty stable for a while now but now randomly hit again; so sooner or later I'll try the suggestions, thank you!

[TomasVotruba]

[ERROR] Could not process "/app/vendor/rector/rector/vendor/symplify/easy-parallel/src/ValueObject/ParallelProcess.php" file, due to: "Child process timed out after 120 seconds". On line: 103

Looking at the error, it looks like you're running on the root directory. That should never happen. Always explicitly state your directories with PHP code, e.g.

vendor/bin/rector process src

If this error repeat, please create a reproducible repository on Github, so we have isolated environment and can tackle this issue directly :slightly_smiling_face:

Thanks

[bicpi]

Hi Thomas, Sorry, the example code was incomplete; we are indeed limiting the runs on certain directories and the error occurred from time to time, either locally on a strong machine or during CI with less stronger workers. For now we excluded it from our CI and run the checks from time to time manually and limited scope.