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 Topic: Mod_fcgid 2.3.7 (x64) live-lock on graceful restart |
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thijs
Joined: 30 Jul 2010
Posts: 3
Location: Eindhoven, NL
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 Posted: Fri 14 Sep '12 11:58 Post subject: Mod_fcgid 2.3.7 (x64) live-lock on graceful restart |
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Running Apache 2.4.3 with mod_fcgid 2.3.7 (x64) binaries from ApacheLounge; official PHP 5.4.6 binaries.
We have an automated deployment running on our testing server, which includes a graceful restart of Apache after each deployment. As such, Apache is restarted (gracefully) about 30 times each day.
Once every couple of days, the old Apache worker-process isn't terminated properly and goes into a live-lock (taking up all cycles for a single CPU core). Most of the times it's only the worker process, sometimes a couple of PHP instances keep lingering below it as well.
Below a trace of the live-locked httpd.exe; it seems to be the same every time it happens...
| Code: | libapr-1.dll!apr_allocator_max_free_set+0x243
libapr-1.dll!apr_pool_destroy+0xc4
libapr-1.dll!apr_pool_destroy+0x2e
httpd.exe+0x1271
httpd.exe+0x2876
httpd.exe+0x2ca2
kernel32.dll!BaseThreadInitThunk+0xd
ntdll.dll!RtlUserThreadStart+0x21 |
I'm not an expert, but looking around a bit on the Apache bug-tracker, it seems this issue might be caused by the solution implement for Apache Bug 50309 (https://issues.apache.org/bugzilla/show_bug.cgi?id=50309).
Anybody around how can help me to further pin down this issue, or is it best to simply raise this issue on the Apache bug-tracker? |
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James Blond
Moderator
Joined: 19 Jan 2006
Posts: 7371
Location: Germany, Next to Hamburg
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| Posted: Mon 17 Sep '12 17:21 Post subject: |
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Well bug 50309 has been fixed. The patch is in 2.3.7
You can try to add
FcgidWin32PreventOrphans On
to your config |
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thijs
Joined: 30 Jul 2010
Posts: 3
Location: Eindhoven, NL
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| Posted: Mon 17 Sep '12 17:35 Post subject: |
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The "FcgidWin32PreventOrphans" directive is switched on. I've tried disabling it, but the issue appears to occur irrespective of whether it is enabled or disabled.
My, uneducated, guess would be that something in the fix for 50309 is causing this issue... |
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