Jim Mathies [:jimm] Reporter
	Description • 9 years ago

Of the total content crashes we experience when running under e10s, preliminary data indicates around 85% of these are triggered by the content process being terminated by the parent due to long shutdown times.


https://gist.github.com/chutten/870e97c789096edb2752a67b23d3a079

	Bill McCloskey [inactive unless it's an emergency] (:billm)
	Comment 1 • 9 years ago

We'll have to figure out how far we want to go here. If a web page is running slowly, it's going to take some time to shut down the content process. We could try to stop all content JS. That would be a decent amount of work.

	Jim Mathies [:jimm] Reporter
	Comment 2 • 9 years ago

Why don't we turn this timeout + kill off on nightly and see how bad the problem is? I've been running with this for a day and I'm not seeing any issues.

	Jim Mathies [:jimm] Reporter
	Comment 3 • 9 years ago

dom.ipc.tabs.shutdownTimeoutSecs

	Bill McCloskey [inactive unless it's an emergency] (:billm)
	Comment 4 • 9 years ago

Wouldn't that just transform one of these ShutDownKill crashes into a shutdown hang in the parent process? I guess the difference is that we wait 60 seconds in the parent versus 5 seconds in the child. Maybe we could just boost the timeout to 15 seconds or something?

	Jim Mathies [:jimm] Reporter
	Comment 5 • 9 years ago

(In reply to Bill McCloskey (:billm) from comment #4)
> Wouldn't that just transform one of these ShutDownKill crashes into a
> shutdown hang in the parent process? I guess the difference is that we wait
> 60 seconds in the parent versus 5 seconds in the child. Maybe we could just
> boost the timeout to 15 seconds or something?

Yep, in triage we discussed moving it out a bit on Nightly to see if the ShutDownKill numbers fall off. IMHO content occasionally taking a little more than 5 seconds to shutdown doesn't surprise me. That timeout feels a little aggressive.

	Jim Mathies [:jimm] Reporter
	Comment 6 • 9 years ago

Here's a try push with the timeout turned off - 

https://treeherder.mozilla.org/#/jobs?repo=try&author=jmathies@mozilla.com&selectedJob=20665837

I don't see a lot of issues here. shutdown failures that do show up appear to be common intermitents.