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Posted to bugs@httpd.apache.org by bu...@apache.org on 2007/10/25 00:52:13 UTC

DO NOT REPLY [Bug 43696] New: - race condition when trying to shutdown httpd immediately after starting it

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           Summary: race condition when trying to shutdown httpd immediately
                    after starting it
           Product: Apache httpd-2
           Version: 2.2.3
          Platform: All
        OS/Version: other
            Status: NEW
          Keywords: PatchAvailable
          Severity: normal
          Priority: P2
         Component: prefork
        AssignedTo: bugs@httpd.apache.org
        ReportedBy: arun@shme.net


This was first noticed while using httpd 2.2.3 on Solaris SPARC, but the bug is
still present in httpd 2.2.6 and could surface on any platform using prefork.

The issue is that the signal handlers are installed before the restart_pending
and shutdown_pending variables are initialized.  If httpd receives SIGTERM while
child processes are being spawned, it will be completely ignored.  The following
two commands, one immediately called after the other, can reproduce the situation:

  httpd -k start
  httpd -k stop

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DO NOT REPLY [Bug 43696] - race condition when trying to shutdown httpd immediately after starting it

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=43696>.
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=43696





------- Additional Comments From arun@shme.net  2007-10-24 15:53 -------
Created an attachment (id=21040)
 --> (http://issues.apache.org/bugzilla/attachment.cgi?id=21040&action=view)
patch to prefork.c


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