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Posted to bugs@httpd.apache.org by bu...@apache.org on 2018/03/20 22:52:45 UTC
[Bug 62202] New: Child servers hang in gracefully shutting down
state indefinitely
https://bz.apache.org/bugzilla/show_bug.cgi?id=62202
Bug ID: 62202
Summary: Child servers hang in gracefully shutting down state
indefinitely
Product: Apache httpd-2
Version: 2.4.29
Hardware: PC
OS: Linux
Status: NEW
Severity: critical
Priority: P2
Component: mpm_event
Assignee: bugs@httpd.apache.org
Reporter: mark@blackmans.org
Target Milestone: ---
Created attachment 35794
--> https://bz.apache.org/bugzilla/attachment.cgi?id=35794&action=edit
gdb full thread backtrace from a hung child server.
I've attached a backtrace and this problem look similar to a couple of others,
but in Apache 2.4.32 (the one that didn't get fully announced), we can see that
child servers go into stopping mode (gracefully shutting down), but never
actually go away. I've attached a backtrace suggesting that weblogic webserver
plugin module maybe the one causing the deadlock/hang/freeze, but would like
some idea of options from here.
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[Bug 62202] Child servers hang in gracefully shutting down state
indefinitely
Posted by bu...@apache.org.
https://bz.apache.org/bugzilla/show_bug.cgi?id=62202
mark@blackmans.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEEDINFO |RESOLVED
Resolution|--- |FIXED
--- Comment #3 from mark@blackmans.org ---
I think that's slightly different. In any case, we have resolved the issue by
setting MaxConnectionsPerChild to 0 for now, although I suspect that deadlock
still exists. A problem for Oracle to solve in any case.
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[Bug 62202] Child servers hang in gracefully shutting down state
indefinitely
Posted by bu...@apache.org.
https://bz.apache.org/bugzilla/show_bug.cgi?id=62202
--- Comment #2 from Yann Ylavic <yl...@gmail.com> ---
Looks like it's not really a new issue:
https://stackoverflow.com/questions/38315004/apache-2-4-lot-of-stuck-threads-in-w-sending-reply-mode?utm_medium=organic&utm_source=google_rich_qa&utm_campaign=google_rich_qa
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[Bug 62202] Child servers hang in gracefully shutting down state
indefinitely
Posted by bu...@apache.org.
https://bz.apache.org/bugzilla/show_bug.cgi?id=62202
Yann Ylavic <yl...@gmail.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |NEEDINFO
--- Comment #1 from Yann Ylavic <yl...@gmail.com> ---
Unfortunately a worker thread is blocked (deadlock?) in
wl_increment_state_metric() from mod_wl_24, which is closed sources.
I suppose that you'll have to ask for support to Oracle...
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