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Posted to bugs@httpd.apache.org by bu...@apache.org on 2013/07/11 12:56:39 UTC
[Bug 55239] New: Apache Graceful restart issue
https://issues.apache.org/bugzilla/show_bug.cgi?id=55239
Bug ID: 55239
Summary: Apache Graceful restart issue
Product: Apache httpd-2
Version: 2.2.22
Hardware: Sun
OS: Solaris
Status: NEW
Severity: critical
Priority: P2
Component: mpm_worker
Assignee: bugs@httpd.apache.org
Reporter: akshay.ballarpure@nsn.com
Hi,
We are facing an issue during Apache graceful restart meaning some of the child
httpd process are not getting restarted sometime on graceful restart.
After putting below below fix in prefork.c, we are not seeing issue.
static void clean_child_exit(int code)
{
//below code added to fix graceful restart
//fix start
apr_signal(SIGHUP, SIG_IGN);
apr_signal(SIGTERM, SIG_IGN);
apr_signal(SIGUSR1, SIG_IGN);
apr_signal(AP_SIG_GRACEFUL, SIG_IGN);
// fix end
mpm_state = AP_MPMQ_STOPPING;
if (pchild) {
apr_pool_destroy(pchild);
}
ap_mpm_pod_close(pod);
chdir_for_gprof();
exit(code);
}
However we would like to know if there is any impact with this changes.
your urgent reply is appreciated.
Thanks,
Akshay
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[Bug 55239] Apache Graceful restart issue
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=55239
--- Comment #4 from aks <ak...@nsn.com> ---
Can you please update us?
Regards,
Akshay
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[Bug 55239] Apache Graceful restart issue
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=55239
Eric Covener <co...@gmail.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |NEEDINFO
--- Comment #7 from Eric Covener <co...@gmail.com> ---
Blocking signals makes them _not_ hang? How long?
Can you get a series of backtraces from one that's hanging and post it here?
Does the server respond to new requests while some processes hang?
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[Bug 55239] Apache Graceful restart issue
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=55239
--- Comment #9 from aks <ak...@nsn.com> ---
Can you please update us .Thanks
Regards,
Akshay
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[Bug 55239] Apache Graceful restart issue
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=55239
--- Comment #1 from aks <ak...@nsn.com> ---
Can you please provide an update on the below?
Thanks,
Akshay
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[Bug 55239] Apache Graceful restart issue
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=55239
--- Comment #6 from aks <ak...@nsn.com> ---
Can you please update us? thanks.
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[Bug 55239] Apache Graceful restart issue
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=55239
Rainer Jung <ra...@kippdata.de> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEEDINFO |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #12 from Rainer Jung <ra...@kippdata.de> ---
*** This bug has been marked as a duplicate of bug 49504 ***
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[Bug 55239] Apache Graceful restart issue
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=55239
--- Comment #10 from Eric Covener <co...@gmail.com> ---
You haven't provided any detail describing a bug. At the very least, answer the
previous quesions about how long the processes linger, what state they're in
after the restart (pstack).
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[Bug 55239] Apache Graceful restart issue
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=55239
aks <ak...@nsn.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |akshay.ballarpure@nsn.com
--- Comment #11 from aks <ak...@nsn.com> ---
Created attachment 30649
--> https://issues.apache.org/bugzilla/attachment.cgi?id=30649&action=edit
pstack and pfiles o/p of lingering process
hello,
I am attaching here pstack and pfiles o/p for lingering process.
We are seeing process lingered for more than a week.
Regards,
Akshay
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[Bug 55239] Apache Graceful restart issue
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=55239
--- Comment #8 from aks <ak...@nsn.com> ---
all child httpd plus fast cgi processes will be killed immediately and started
new processes on graceful restart.
you meant pstack and pfiles o/p on hanged processes ?
Apache/FCGI server were able to respond to new request for 6 hours after
graceful restart.
Regards,
Akshay
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[Bug 55239] Apache Graceful restart issue
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=55239
--- Comment #5 from aks <ak...@nsn.com> ---
We are now ignoring all the signals while cleaning up resources. please let us
know if any issue with these changes? Thanks .
static void clean_child_exit(int code)
{
sigset_t mask;
sigfillset(&mask);
sigprocmask(SIG_SETMASK, &mask, NULL);
/*apr_signal(SIGHUP, SIG_IGN);
apr_signal(SIGTERM, SIG_IGN);
apr_signal(SIGUSR1, SIG_IGN);
apr_signal(AP_SIG_GRACEFUL, SIG_IGN);*/
ap_log_error(APLOG_MARK, APLOG_ERR, 0, NULL, "AKS:exiting %d process",
getpid());
mpm_state = AP_MPMQ_STOPPING;
if (pchild) {
apr_pool_destroy(pchild);
}
ap_mpm_pod_close(pod);
chdir_for_gprof();
exit(code);
}
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[Bug 55239] Apache Graceful restart issue
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=55239
--- Comment #2 from Eric Covener <co...@gmail.com> ---
Can you clarify the problem? Children are not restarted during a graceful
restart. They're replaced by new processes and allowed to exit when they're
ready.
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[Bug 55239] Apache Graceful restart issue
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=55239
--- Comment #3 from aks <ak...@nsn.com> ---
I meant some processes are getting hang for sometime ( here i am not sure about
timing)
Can you clarify below statement?
They're replaced by new processes and allowed to exit when they're ready.
how much time it will take for them to exit ?
Thanks.
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