Error logs filling up with Client AH02027/AH2026: Failed to release SSL session cache lock
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My error_log is filling up with tons of entries like:
www.mine.com [Sun Dec 29 09:29:59 2024] [warn] [pid 903933] ssl_engine_mutex.c(105): (22)Invalid argument: [client AH02027: Failed to release SSL session cache lock
www.mine.com [Sun Dec 29 09:30:00 2024] [warn] [pid 1177911] ssl_engine_mutex.c(92): (22)Invalid argument: [client AH02026: Failed to acquire SSL session cache lock
www.mine.com [Sun Dec 29 09:30:00 2024] [warn] [pid 1177911] ssl_engine_mutex.c(105): (22)Invalid argument: [client AH02027: Failed to release SSL session cache lock
www.mine.com [Sun Dec 29 09:30:00 2024] [warn] [pid 1177911] ssl_engine_mutex.c(92): (22)Invalid argument: [client AH02026: Failed to acquire SSL session cache lock
www.mine.com [Sun Dec 29 09:30:00 2024] [warn] [pid 1177911] ssl_engine_mutex.c(105): (22)Invalid argument: [client AH02027: Failed to release SSL session cache lock
The host solved it at first with:
> I've set the following option in your MySQL configuration file:
>
> log_warnings = 0
>
> This will prevent the logging of warnings, but won't interfere with
> normal error logging.
But after another MySQL upgrade they now say:
> This should be resolved now. The problem was the old setting used to
> suppress these of "log_warnings" was deprecated in 5.7 and removed in
> mySQL 8.0. I have updated the configuration file with the new mySQL
> directive below.
>
> log_error_verbosity = 1
>
> This will result in the same behavior of warnings being suppressed and
> only actual errors will be logged going forward.
It didn't work so they replied back:
> Our lead sysadmin has looked into this and unfortunately could not
> find a way to suppress those warnings, so I'm afraid those are
> "normal" for all intents and purposes.
They provided some additional information:
> The only mutex value set in any of the active Apache configuration
> files is the following:
>
> Mutex default:/usr/nobody
>
> 'DUMP_RUN_CFG' returns these mutex values:
>
> Mutex default: dir="/usr/nobody" mechanism=default Mutex
> ssl-cache: using_defaults Mutex mpm-accept: using_defaults Mutex
> authdigest-opaque: using_defaults Mutex rewrite-map: using_defaults
> Mutex ssl-stapling-refresh: using_defaults Mutex authdigest-client:
> using_defaults Mutex ssl-stapling: using_defaults Mutex proxy:
> using_defaults
>
> There had been a reported bug that caused this error in much earlier
> versions of Ubuntu + Apache, such as:
>
> https://bugs.launchpad.net/ubuntu/+source/apache2/+bug/1565744
>
> but in those cases the mutex mechanism returned by 'DUMP_RUN_CFG' was:
>
> mechanism=fcntl
>
> and we haven't been able to find anything relevant to the version of
> Apache running on your server (2.4.62).
Does anyone know how to stop all this logging, it makes it hard to find actual things in error_log that need to be looked at.
TIA!!
Asked by user3161924
(283 rep)
Dec 29, 2024, 06:04 PM
Last activity: Jul 14, 2025, 02:24 AM
Last activity: Jul 14, 2025, 02:24 AM