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Home > Archive > Web Servers on Unix and Linux > October 2006 > "Deadlock" errors/warnings in error_log
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"Deadlock" errors/warnings in error_log
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| Hi,
We're running Apache 2.0.55 on Solaris 9, and we are seeing a number of
"[error]" and "[warn]" messages in the error_log file. The error msgs
occur occasionally, but the warn msgs are output quite frequently.
The error msgs say:
[error] [client AAA.BBB.CCC.DDD] (45) Deadlock situation
detected/avoided: apr_global_mutex_lock (rewrite_log_lock) failed,
referer: http://myhostx.xxx.com/...
The warn msgs say:
[warn] (45) Deadlock situation detected/avoided: ap_proxy: couldn't
create the lock
Does anyone know what might be causing these messages, and how to
eliminate them?
Also, since these msgs seem to refer to mutexes and locks, would these
errors and warnings be causing the performance of Apache to slow down?
Thanks in advance,
Jim
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| danto2 2006-10-19, 1:18 pm |
| We ran into a v similar problem with 2.0.55 on Solaris 8. Have a look
at this bug report which I think is relevant to your situation:
http://issues.apache.org/bugzilla/show_bug.cgi?id=32325
We changed the acceptmutex from the default (fcntl) to pthread and this
fixed our issue.
HTH
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| danto2 wrote:
> We ran into a v similar problem with 2.0.55 on Solaris 8. Have a look
> at this bug report which I think is relevant to your situation:
>
> http://issues.apache.org/bugzilla/show_bug.cgi?id=32325
>
> We changed the acceptmutex from the default (fcntl) to pthread and this
> fixed our issue.
>
>
> HTH
danto2,
Thanks! I'll check into this and will try to post back...
Jim
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