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Posted to bugs@httpd.apache.org by bu...@apache.org on 2006/02/09 17:03:41 UTC
DO NOT REPLY [Bug 38595] New: - httpd dumps core after successive kill -1 signals
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Summary: httpd dumps core after successive kill -1 signals
Product: Apache httpd-2
Version: 2.0.55
Platform: Other
OS/Version: FreeBSD
Status: NEW
Severity: critical
Priority: P2
Component: Core
AssignedTo: bugs@httpd.apache.org
ReportedBy: apache@spatula.net
If httpd receives signal 1 (HUP) many times rapidly, it will dump core. It may
be a race condition in the config read, or it may be that the config read needs
to disable further signal 1's until it is complete.
Here's a stack trace. Sorry I don't have a build with debugging symbols.
(gdb) bt
#0 0x486d3db8 in ?? () from /usr/lib/libpthread.so.2
#1 0x48323d21 in apr_dir_read () from /usr/local/lib/apache2/libapr-0.so.9
#2 0x08067c2e in ap_process_resource_config ()
#3 0x08079234 in include_config ()
#4 0x08066930 in invoke_cmd ()
#5 0x08066c98 in ap_build_config_sub ()
#6 0x080d403b in ?? ()
#7 0xbfbfe3d8 in ?? ()
#8 0x0806d7c0 in cfg_getstr ()
#9 0x08092fc0 in needcset ()
This is using the multi-process model, not the threaded model (so there's only
one thread).
You can duplicate this by starting httpd, getting the PID, and sending the
parent httpd kill -1 many times in rapid succession. Eg,
# kill -1 12345; kill -1 12345; kill -1 12345; kill -1 12345; kill -1 12345
# kill -1 12345; kill -1 12345; kill -1 12345; kill -1 12345; kill -1 12345
# kill -1 12345; kill -1 12345; kill -1 12345; kill -1 12345; kill -1 12345
Eventually the httpd process will dump core.
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DO NOT REPLY [Bug 38595] - httpd dumps core after successive kill -1 signals
Posted by bu...@apache.org.
DO NOT REPLY TO THIS EMAIL, BUT PLEASE POST YOUR BUG�
RELATED COMMENTS THROUGH THE WEB INTERFACE AVAILABLE AT
<http://issues.apache.org/bugzilla/show_bug.cgi?id=38595>.
ANY REPLY MADE TO THIS MESSAGE WILL NOT BE COLLECTED AND�
INSERTED IN THE BUG DATABASE.
http://issues.apache.org/bugzilla/show_bug.cgi?id=38595
jorton@redhat.com changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |NEEDINFO
------- Additional Comments From jorton@redhat.com 2006-03-30 09:28 -------
Without debugging symbols this may be somewhat hard to track down. Can you
rebuild passing CFLAGS=-g to configure?
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