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I don't know much on this, but for the bug link you included, one comment mentioned it being a problem with event mpm, that went away when using worker mpm. Is it possible to try the worker mpm?
Date: Mon, 1 Jun 2015 23:58:13 +0000 From: mark_jacquet@xxxxxxxxx.INVALID To: users@xxxxxxxxxxxxxxxx Subject: AH00485: scoreboard is full, not at MaxRequestWorkers Sorry for the bandwidth, this is a repeat send from January. We STILL have this issue. Perhaps a new look might jolt your memory and help me resolve this issue!!! Problem: Apache
server will stay up for random amount of time, usually days, but
eventually enters a hung state. When hung the CPU load gradually spikes
on the machine and new web server requests are unresponsive. Only a full server stop/kill and restart will resolve the issue, at which time the host load average drops quickly to normal. Error logs typically contain many many lines of: Wed Jan 28 16:06:58.667188 2015] [mpm_event:error] [pid 25336:tid 1] AH00485: scoreboard is full, not at MaxRequestWorkers I
have done a lot of web research on this top and have found many cases
where others have had the same/similar issue but no real solutions.
Seem very close to this bug report: https://issues.apache.org/bugzilla/show_bug.cgi?id=53555 Environment: LDOM (VM) SunOS myhostname 5.10 Generic_118833-36 sun4v sparc SUNW,Sun-Fire-T200 8G RAM http Conf: StartServers 8 MinSpareServers Not set MaxSpareServers Not set ServerLimit 256 MaxRequestWorkers 200 MaxConnectionsPerChild 200 KeepAlive On TimeOut 3000 MaxKeepAliveRequests 50 KeepAliveTimeout 2 RequestReadTimeout header=10-20,MinRate=500 body=20,MinRate=500 We use LDAP to authenitcate most of our web tools, and this is configured like: # # Enable the LDAP connection pool and shared # memory cache. Enable the LDAP cache status # handler. Requires that mod_ldap and mod_authnz_ldap be loaded. # LDAPSharedCacheSize 500000 LDAPCacheEntries 1024 LDAPCacheTTL 600 LDAPOpCacheEntries 1024 LDAPOpCacheTTL 600 Current non-hung Score Board: Apache Server Status for myserver.domain (via 5.5.5.5)
........................._______________________________________ ________W__________________________________W_________________... ................................................................ ........ Any thoughts/comments on http conf tuning, OS patches, apache bug fixes appreciated. This is a production server, so you can imagine, having it go down at random times (usually when I am asleep) is not fun! Thanks. MJ | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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