DO NOT REPLY [Bug 36281] - problem with Failover in jk_lb_worker.c

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http://issues.apache.org/bugzilla/show_bug.cgi?id=36281


[EMAIL PROTECTED] changed:

   What|Removed |Added

 Status|NEW |RESOLVED
 Resolution||WORKSFORME




--- Additional Comments From [EMAIL PROTECTED]  2005-08-20 01:28 ---
Sorry for all this.  We were building on a seperate machine using the gcc 
compiler, because our primary Sun build machine wasnt working at the time.  Now 
it is and I recompiled on it, and everything is hunkey-dorey now.

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DO NOT REPLY [Bug 36281] - problem with Failover in jk_lb_worker.c

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--- Additional Comments From [EMAIL PROTECTED]  2005-08-19 23:43 ---
Config is pretty basic and looks OK.
The process dead is strange and I don't see an immediate reason for it.

It would be good, if you could reproduce it with without parallel requests to
simplify the situation.

Did you build apache and mod_jk yourself? Have they been compiled using the same
compiler and the same CFLAGS?

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DO NOT REPLY [Bug 36281] - problem with Failover in jk_lb_worker.c

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--- Additional Comments From [EMAIL PROTECTED]  2005-08-19 22:24 ---
The pstack returned nothing, and I confirmed by watching TOP that the process 
is created then dies when the http request is over.

I am having trouble running truss, I'll get back to you with that when I can.

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DO NOT REPLY [Bug 36281] - problem with Failover in jk_lb_worker.c

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--- Additional Comments From [EMAIL PROTECTED]  2005-08-19 22:22 ---
Created an attachment (id=16120)
 --> (http://issues.apache.org/bugzilla/attachment.cgi?id=16120&action=view)
Mod_jk configuration file


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DO NOT REPLY [Bug 36281] - problem with Failover in jk_lb_worker.c

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--- Additional Comments From [EMAIL PROTECTED]  2005-08-19 22:21 ---
Created an attachment (id=16119)
 --> (http://issues.apache.org/bugzilla/attachment.cgi?id=16119&action=view)
workers.properties


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DO NOT REPLY [Bug 36281] - problem with Failover in jk_lb_worker.c

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--- Additional Comments From [EMAIL PROTECTED]  2005-08-19 21:33 ---
I would like to see your workers.properties and the Jk directives in your httpd
configuration.

Also: Could you please check, if the failing Apache child processes are still
there, or if they died? The log chows the PID of the relevant process directly
behind the date. If the process is still there, you can use

/usr/proc/bin/pstack PID

to write a thrad dump. That way we can confirm, in which function the hanging
process sits. You could attach the pstack.

If the process is not there any more, it might have crashed. In case you succeed
in dumping a core file of the process, you can again use pstack on that core 
file.

Finally it might be interesting to use truss (or if you are already familiar
with it dtrace) to find out, if the error is related to some system call.
Configure apache to only use very few children (like startng 2 servers and
having sparemax and min also equals to 2). Start the server via

truss -f -o some_output_file -w all -r all -v all \
/usr/local/apache/bin/apachectl start

and then redo your tests (apache will be a little slow). The file
some_output_file contains information about all system calls, about bytes read
and written, signals received, errnos etc.

To have a somewhat easier test case: In the log you attached one can see, that
the working request for the html produces to image requests going to two apache
processes in parallel which both fail. I ould be a simpler retest to only use
single requests, not something in parallel, e.g. not automatically reloading
embedded objevcts via the browser.

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DO NOT REPLY [Bug 36281] - problem with Failover in jk_lb_worker.c

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--- Additional Comments From [EMAIL PROTECTED]  2005-08-19 21:09 ---
Created an attachment (id=16117)
 --> (http://issues.apache.org/bugzilla/attachment.cgi?id=16117&action=view)
A full log file showing one failed request


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