HTTP Server Error "Child Could Not Open Sslmutex Lockfile" (Doc ID 562624.1)

Last updated on NOVEMBER 04, 2016

Applies to:

Oracle HTTP Server - Version 10.1.2.0.2 to 10.1.3.4.0 [Release AS10gR2 to AS10gR3]
Oracle Solaris on SPARC (32-bit)

Symptoms

Intermittently, over a period of several days or weeks, HTTP Server will suddenly lock up - neither processing connections, nor rejecting them.  
The error_log may contain thousands (typically one per user click) of the following entries :

mod_ossl: Child could not open SSLMutex lockfile /apps/oracle/oas/10.1.3.1/Apache/Apache/logs/ssl_mutex.10549 (System error follows)
System: No such file or directory (errno: 2)

In addition, the opmn HTTP_Server~1   log file will show :

HTTP_Server~HTTP_Server~HTTP_Server~1 (1424822753:10549) [The connection
receive timed out]
08/02/25 08:31:35 [libopmnohs] Process Ping Failed:
08/02/25 08:32:25 [libopmnohs] Process Unreachable:
HTTP_Server~HTTP_Server~HTTP_Server~1 (1424822753:10549)
08/02/25 08:32:27 [pm-process] Stopping Process:
HTTP_Server~HTTP_Server~HTTP_Server~1 (1424822753:10549)
08/02/25 08:33:27 [pm-process] Stopping Process:
HTTP_Server~HTTP_Server~HTTP_Server~1 (1424822753:10549)
08/02/25 08:33:27 [libopmnohs] Forcefully Terminating Process:
HTTP_Server~HTTP_Server~HTTP_Server~1 (1424822753:10549)

Changes

This may be encountered with a default out-of-the-box installation.

Cause

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