forever stop does not stop child processes

[tjwebb]

If I use something like sudo -u in my forever script, the sudo process is stopped but the actual process that I care about is still running after I stop it. Is there some way to kill the entire process group?

[indexzero]

This is a duplicate of #544. It's because you are running as a different user and it can't find the bookkeeping files.

[tjwebb]

forever list works fine. And it does kill the parent process, but not the
child process.
On Oct 30, 2014 4:35 AM, "Charlie Robbins" [email protected] wrote:

Closed #621 #621.

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#621 (comment).

[indexzero]

Oh, in that case I believe you want the --killTree option.

[tjwebb]

killTree has no effect. It's already set to true in my config

[indexzero]

What operating system are you on? You might also consider what --killSignal you are sending.

[tjwebb]

Ubuntu 14.04.

Everything stops correctly if I manually pgrep for the processes and kill -9 them. But forever only kills the forever-monitor and sudo processes. The actual node processes I want to kill are no longer in the forever list, but are still running.

[indexzero]

Hmm that is strange since forever-monitor is by default sending the SIGKILL signal which is the same as kill -9

http://askubuntu.com/a/184079

[tjwebb]

Yea, it sends SIGKILL only to the forever-monitor and sudo -u
processes. No signal is sent to the node process at all, despite killTree
being set to true.

On Mon, Nov 3, 2014 at 2:51 PM, Charlie Robbins [email protected]
wrote:

Hmm that is strange since forever-monitor is by default sending the
SIGKILL signal which is the same as kill -9

http://askubuntu.com/a/184079

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#621 (comment).

[indexzero]

So all of the killTree functionality is done via the ps-tree module which is actually super brittle and a place I would love to help improve.

It just spawns:

ps -A -o ppid,pid

And then parses the output.

[indexzero]

For reference: https://github.com/indexzero/ps-tree/blob/master/index.js#L15

... do you have some time to run that command exactly and see what's going on?

[tjwebb]

Ok. To solve this, I wrote a pgrep module that finds the processes that forever is not correctly finding: https://github.com/tjwebb/node-pgrep.

Maybe this can be integrated into forever at some point.

[indexzero]

is pgrep guaranteed to be on all systems?

[tjwebb]

no idea

[indexzero]

Any interest in finding out to help fix this issue? :)

[tjwebb]

Yea, I'll do some research later. Thanks for your help in pointing me in the right direction.

[indexzero]

Thank you for bearing with me. I'm going to leave this closed, but open a corresponding issue on forever-monitor.

[sugir93]

function exitHandler(options, err) {
console.log(err.stack);
child_process.stop();
process.exit();
}

//do something when app is closing
process.on('exit', exitHandler.bind(null,{cleanup:true}));

//catches ctrl+c event
process.on('SIGINT', exitHandler.bind(null, {exit:true}));

// catches "kill pid" (for example: nodemon restart)
process.on('SIGUSR1', exitHandler.bind(null, {exit:true}));
process.on('SIGUSR2', exitHandler.bind(null, {exit:true}));

//catches uncaught exceptions
process.on('uncaughtException', exitHandler.bind(null, {exit:true}));