https://issues.apache.org/bugzilla/show_bug.cgi?id=45483
Summary: Orphan thread consume 100% cpu
Product: Apache httpd-2
Version: 2.2.9
Platform: PC
OS/Version: Linux
Status: NEW
Severity: critical
Priority: P2
Component: Core
AssignedTo: [email protected]
ReportedBy: [EMAIL PROTECTED]
We run Apache as reverse proxy cache in front of our web servers, with worker
as MPM. After upgrade from 2.2.7 to 2.2.9 we experience the following issue:
After a while, a thread consumes a whole CPU, his parent process is already
dead so it has been attached to the root HTTPD process.
In some cases, Apache do not listen anymore for incoming connections.
I guess the problem appears when the MaxRequestsPerChild connections has been
reached and the parent process is stopped.
The error log file shows errors like:
[Thu Jul 24 23:42:39 2008] [notice] child pid 18239 exit signal Segmentation
fault (11)
but we cannot link the time of occurrences with the moment the cpu is fully
used.
strace does not show anything, we do not manage to make thread generate a core
dump.
Regards.
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