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From: bugzilla@apache.org
To: bugs@httpd.apache.org
Subject: DO NOT REPLY [Bug 41367]  New:  - Logging to a pipe causes hanging
 children when doing a graceful restart
Message-ID: <bug-41367-7868@http.issues.apache.org/bugzilla/>
Date: Mon, 15 Jan 2007 04:44:18 -0800 (PST)

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http://issues.apache.org/bugzilla/show_bug.cgi?id=41367

           Summary: Logging to a pipe causes hanging children when doing a
                    graceful restart
           Product: Apache httpd-1.3
           Version: 1.3.34
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: minor
          Priority: P5
         Component: core
        AssignedTo: bugs@httpd.apache.org
        ReportedBy: dave64@andrew.cmu.edu


When apache logs via a pipe to a child process (cronolog, for example) a
graceful restart will kill the cronolog process leaving any httpd processes
writing to that log pipe in a blocking write() call.  Apache leaves the read end
of the pipe open in the parent on creation, so the httpd will never receive
EPIPE on this write since there will always be a reader (itself).  This results
in many httpds stuck in 'L' state after a graceful restart.

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