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Posted to bugs@httpd.apache.org by bu...@apache.org on 2016/10/27 09:41:07 UTC

[Bug 60309] New: Graceful restart sometimes causes connection problems

https://bz.apache.org/bugzilla/show_bug.cgi?id=60309

            Bug ID: 60309
           Summary: Graceful restart sometimes causes connection problems
           Product: Apache httpd-2
           Version: 2.4.23
          Hardware: PC
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Core
          Assignee: bugs@httpd.apache.org
          Reporter: dnie@d-velop.de

When doing an graceful restart, I sometimes get errors on my clients.

When testing with the "Apache JMeter" stress tool with 50 parallel HTTP
clients, I get different errors from JMeter like:

- Connection reset by peer: socket write error
- host.domain.com failed to respond
- SSLHandshakeException: Remote host closed connection during handshake

This happens on about 10% of my graceful restarts.
If this happens, 1 or more parallel HTTP connections are affected.

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[Bug 60309] Graceful restart sometimes causes connection problems

Posted by bu...@apache.org.
https://bz.apache.org/bugzilla/show_bug.cgi?id=60309

--- Comment #1 from Luca Toscano <to...@gmail.com> ---
Hi! 

Can you give us a bit more info about your settings? What MPM do you use? What
it is its configuration? Is there an easy way to reproduce the issue?

Thanks!

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[Bug 60309] Graceful restart sometimes causes connection problems

Posted by bu...@apache.org.
https://bz.apache.org/bugzilla/show_bug.cgi?id=60309

--- Comment #2 from dnie@d-velop.de ---
Hi,

We use Apache as a reverse proxy. Configuration is one virtual host with HTTPS.
We use mod_proxy and mod_proxy_balancer.

The MPM is mpm_winnt and its config is:
  ThreadsPerChild  250
  MaxRequestsPerChild 0
  <nothing else>

To reproduce: 
Just run a stress test like Apache JMeter or Apache Bench on one existing
location and keep it running. 
Then graceful restart Apache using command "httpd.exe -k restart -m Apache -d
C:\path\to\apache"
The restart allways succeed but in some cases the stress test shows some
connections errors.

Thanks for your help

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[Bug 60309] Graceful restart sometimes causes connection problems

Posted by bu...@apache.org.
https://bz.apache.org/bugzilla/show_bug.cgi?id=60309

Szőgyényi Gábor <sz...@freemail.hu> changed:

           What    |Removed                     |Added
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                 CC|                            |szg0000@freemail.hu

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