Dealing with Zombies processes

[mlasri-web2]

Dealing with Zombies processes

[trowski]

Hi @mlasri-web2!

I thought the zombie process was fixed in amphp/process, see PosixHandle::waitPid(), which should be invoked by the event-loop callback which is awaiting the exit code pipe for the process. Would you be able to have a look to see if there's any reason the waitPid function is not being invoked?

[medy36]

Hi @trowski, am reopening the subject again as we kept deleting the .sock files left in /tmp/ using a job. temporary solution for these zombies.

The actual situation is we use the Process in two ways, CLI and HTTP. the CLI does close the .sock files properly, but the same service in Symfony controller (POST http endpoint) does leave One .sock in each request: srwxrwxrwx 1 www-data www-data 0 Apr 5 00:53 amp-parallel-ipc-87cff776753e279b1e56.sock.

Note: PosixHandle::asyncWaitPid is invoked

Am still trying to figure out the reason and a solution.

[trowski]

The temporary .sock file should be removed by LocalIpcHub::unlink(), which should be invoked in the destructor. Can you have a look if this function is being invoked, and if not, why that might be happening? We are suppressing errors there, you could try removing that suppression to see if there is an unexpected error (though if the file was created, I'd expect removing it to succeed as well).

[medy36]

@trowski thank you for pointing the LocalIpcHub::unlink() i found out that amp/parallel was in version V2.2.2 which does not include the destructor().

The upgrade works perfectly!
Thank you very much.

[trowski]

@medy36 Thanks for confirming my recent changes fixed the issue!