https://issues.apache.org/bugzilla/show_bug.cgi?id=51078
Summary: mod_fcgid spawned CGI Processes gets orphaned when
Apache gets restarted/killed
Product: Apache httpd-2
Version: 2.2.17
Platform: PC
OS/Version: Windows Server 2003
Status: NEW
Keywords: PatchAvailable
Severity: normal
Priority: P2
Component: mod_fcgid
AssignedTo: [email protected]
ReportedBy: [email protected]
Created an attachment (id=26897)
--> (https://issues.apache.org/bugzilla/attachment.cgi?id=26897)
Patch to fix mod_fcgid spwaned CGI process orphaning when Apache is
restarted/killed
Problem:
mod_fcgid created CGI processes get orphaned during Apache shutdown or abrupt
child process termination.
Reproduction steps:
Allow Apache Child process to spwan few CGI process via mod_fcgid. Kill the
Apache child process.
Root Cause:
Apache when run as windows service during shutdown/restart of service process
(master/parent) will terminate child httpd process within 30 seconds (refer
\server\mpm\winnt\mpm_winnt.c:master_main() int timeout = 30000), therefore if
Apache worker threads are too busy to react to Master's graceful exit signal
within 30 seconds - mod_fcgid cleanup routines will not get invoked (refer
\server\mpm\winnt\child.c: child_main() apr_pool_destroy(pchild); ) thereby
orphaning all mod_fcgid spwaned CGI processes.
Solution (implemented in patch):
Utilize Win32 JobObjects to clean up child processes automatically so that CGI
processes are gauranteed to get killed during abnormal mod_fcgid/Apache
termination. Created a new Fcgid configuration option called
FcgidWin32PreventOrphans.
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