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From "Edmon Begoli" <ebeg...@gmail.com>
Subject Re: URGENT HELP NEEDED: mod_jk loadbalancing issues
Date Mon, 10 Jul 2006 12:14:06 GMT
Each Tomcat machine is running in 512 MB Max.
(We recently increased that to ~850 MB. We are trying not to go up to far to
avoid prolonged garbage collector pauses)

CPU, I/O utilization under heavy loads is not excessive. 80% max usually 60%

Max. thread settings are default.

I was thinking to bump it by 35-50% as well as the backlog.

BTW - What would be the impoact/side effects of increasing the Connectors
max threads and backlog size.

Thanks,
Edmon


_________________________



What is your load average under these circumstance?
>
> Is each of the 10 tomcats on a seperate physical machine?
>
> What are your max thread settings in Tomcat?
>
> Are your tomcat machines CPU bound or I/O bound under full load?
>
> Alex
>
> On 7/9/06, Edmon Begoli <ebegoli@gmail.com> wrote:
> >
> > Hi,
> >
> > First of all - thanks Rainer for willing to look into this issue.
> >
> > Environment description:
> >
> > Web Server: Apache 2.0.52
> > mod_jk: 1.2.15
> > OS: RedHat ES 4.2
> > App. Server: Tomcat 5.5.15
> >
> > Cluster topology: 4 webservers with mod_jk doing sticky loadbalancing
> into
> > 10 tomcats
> >
> > MOD_JK Configuration: Pretty much basic mod_jk and Tomcat settings for
> > AJP13
> >
> > Description of the issue:
> >
> > Under very heavy loads for our standards (about thousand of concurrent
> > users)
> > we start seeing errors (listed at end botton of this e-mail) in the
> mod_jk
> > error log.
> >
> > Our concern is mod_jk behavior on the web server. We closely monitor
> > apache
> > and Apache itself is not under heavy stress. However, shortly after we
> > start
> > seeing these messages in the mod_jk's error log, web server becomes
> > unresponsive
> > and we have to re-start it.
> >
> > While the web server server is unresponsive we monitor 8009 port -
> nothing
> > is going on it.
> >
> > We monitor Tomcats and they are fine.
> >
> > As soon as we re-start web servers traffic resumes. Then under heavy
> loads
> > things break again
> >
> > We are planning on increasing the number of max threads on the Tomcats'
> > AJP connector to imrpove the throughput of the Tomcats.
> >
> > However, our concern is with the web server side lock ups. It seems that
> > mod_jk cannot
> > recover after this oversaturation.
> >
> >
> > TAIL -F FROM THE MOD_JK LOG RIGHT BEFORE  IT "DIES"
> > __________________________________________________
> >
> >
> > [Fri Jul 07 09:59:43 2006] [info]  ajp_service::jk_ajp_common.c (1721):
> > Receiving from tomcat failed, recoverable operation attempt=0
> >
> > [Fri Jul 07 09:59:43 2006] [info]  ajp_service::jk_ajp_common.c (1749):
> > Sending request to tomcat failed,  recoverable operation attempt=1
> >
> > [Fri Jul 07 09:59:44 2006] [error]
> > ajp_connection_tcp_get_message::jk_ajp_common.c (961): Can't receive the
> > response message from tomcat, network problems or tomcat is down (<IP
> > REMOVED>:8009), err=-110
> >
> > [Fri Jul 07 09:59:44 2006] [error] ajp_get_reply::jk_ajp_common.c
> (1503):
> > Tomcat is down or refused connection. No response has been sent to the
> > client (yet)
> >
> > [Fri Jul 07 09:59:44 2006] [info]  ajp_service::jk_ajp_common.c (1721):
> > Receiving from tomcat failed, recoverable operation attempt=0
> >
> > [Fri Jul 07 09:59:44 2006] [info]  ajp_service::jk_ajp_common.c (1749):
> > Sending request to tomcat failed,  recoverable operation attempt=1
> >
> > [Fri Jul 07 09:59:44 2006] [error]
> > ajp_connection_tcp_get_message::jk_ajp_common.c (961): Can't receive the
> > response message from tomcat, network problems or tomcat is down (<IP
> > REMOVED>:8009), err=-110
> >
> > [Fri Jul 07 09:59:44 2006] [error] ajp_get_reply::jk_ajp_common.c
> (1503):
> > Tomcat is down or refused connection. No response has been sent to the
> > client (yet)
> >
> > [Fri Jul 07 09:59:44 2006] [info]  ajp_service::jk_ajp_common.c (1721):
> > Receiving from tomcat failed, recoverable operation attempt=0
> >
> > [Fri Jul 07 09:59:44 2006] [info]  ajp_service::jk_ajp_common.c (1749):
> > Sending request to tomcat failed,  recoverable operation attempt=1
> >
> > [Fri Jul 07 09:59:44 2006] [error]
> > ajp_connection_tcp_get_message::jk_ajp_common.c (961): Can't receive the
> > response message from tomcat, network problems or tomcat is down (<IP
> > REMOVED>:8009), err=-110
> >
> > [Fri Jul 07 09:59:44 2006] [error] ajp_get_reply::jk_ajp_common.c
> (1503):
> > Tomcat is down or refused connection. No response has been sent to the
> > client (yet)
> >
> > [Fri Jul 07 09:59:44 2006] [info]  ajp_service::jk_ajp_common.c (1721):
> > Receiving from tomcat failed, recoverable operation attempt=0
> >
> > [Fri Jul 07 09:59:44 2006] [info]  ajp_service::jk_ajp_common.c (1749):
> > Sending request to tomcat failed,  recoverable operation attempt=1
> >
> > [Fri Jul 07 09:59:45 2006] [error]
> > ajp_connection_tcp_get_message::jk_ajp_common.c (961): Can't receive the
> > response message from tomcat, network problems or tomcat is down (<IP
> > REMOVED>:8009), err=-110
> >
> > [Fri Jul 07 09:59:45 2006] [error] ajp_get_reply::jk_ajp_common.c
> (1503):
> > Tomcat is down or refused connection. No response has been sent to the
> > client (yet)
> >
> > [Fri Jul 07 09:59:45 2006] [info]  ajp_service::jk_ajp_common.c (1721):
> > Receiving from tomcat failed, recoverable operation attempt=0
> >
> > [Fri Jul 07 09:59:45 2006] [info]  ajp_service::jk_ajp_common.c (1749):
> > Sending request to tomcat failed,  recoverable operation attempt=1
> >
> > [Fri Jul 07 09:59:46 2006] [error]
> > ajp_connection_tcp_get_message::jk_ajp_common.c (961): Can't receive the
> > response message from tomcat, network problems or tomcat is down (<IP
> > REMOVED>:8009), err=-110
> >
> > [Fri Jul 07 09:59:46 2006] [error] ajp_get_reply::jk_ajp_common.c
> (1503):
> > Tomcat is down or refused connection. No response has been sent to the
> > client (yet)
> >
> > [Fri Jul 07 09:59:46 2006] [info]  ajp_service::jk_ajp_common.c (1721):
> > Receiving from tomcat failed, recoverable operation attempt=0
> >
> > [Fri Jul 07 09:59:46 2006] [info]  ajp_service::jk_ajp_common.c (1749):
> > Sending request to tomcat failed,  recoverable operation attempt=1
> >
> > [Fri Jul 07 09:59:46 2006] [error]
> > ajp_connection_tcp_get_message::jk_ajp_common.c (961): Can't receive the
> > response message from tomcat, network problems or tomcat is down (<IP
> > REMOVED>:8009), err=-110
> >
> > [Fri Jul 07 09:59:46 2006] [error] ajp_get_reply::jk_ajp_common.c
> (1503):
> > Tomcat is down or refused connection. No response has been sent to the
> > client (yet)
> >
> > [Fri Jul 07 09:59:46 2006] [info]  ajp_service::jk_ajp_common.c (1721):
> > Receiving from tomcat failed, recoverable operation attempt=1
> >
> > [Fri Jul 07 09:59:46 2006] [info]  ajp_service::jk_ajp_common.c (1749):
> > Sending request to tomcat failed,  recoverable operation attempt=2
> >
> > [Fri Jul 07 09:59:47 2006] [error]
> > ajp_connection_tcp_get_message::jk_ajp_common.c (961): Can't receive the
> > response message from tomcat, network problems or tomcat is down (<IP
> > REMOVED>:8009), err=-110
> >
> > [Fri Jul 07 09:59:47 2006] [error] ajp_get_reply::jk_ajp_common.c
> (1503):
> > Tomcat is down or refused connection. No response has been sent to the
> > client (yet)
> >
> > [Fri Jul 07 09:59:47 2006] [info]  ajp_service::jk_ajp_common.c (1721):
> > Receiving from tomcat failed, recoverable operation attempt=0
> >
> > [Fri Jul 07 09:59:47 2006] [info]  ajp_service::jk_ajp_common.c (1749):
> > Sending request to tomcat failed,  recoverable operation attempt=1
> >
> > [Fri Jul 07 09:59:48 2006] [error]
> > ajp_connection_tcp_get_message::jk_ajp_common.c (961): Can't receive the
> > response message from tomcat, network problems or tomcat is down (
> > 10.0.110.16:8009), err=-110
> >
> > [Fri Jul 07 09:59:48 2006] [error] ajp_get_reply::jk_ajp_common.c
> (1503):
> > Tomcat is down or refused connection. No response has been sent to the
> > client (yet)
> >
> > [Fri Jul 07 09:59:48 2006] [info]  ajp_service::jk_ajp_common.c (1721):
> > Receiving from tomcat failed, recoverable operation attempt=0
> >
> > [Fri Jul 07 09:59:48 2006] [info]  ajp_service::jk_ajp_common.c (1749):
> > Sending request to tomcat failed,  recoverable operation attempt=1
> >
> > [Fri Jul 07 09:59:49 2006] [error]
> > ajp_connection_tcp_get_message::jk_ajp_common.c (961): Can't receive the
> > response message from tomcat, network problems or tomcat is down (<IP
> > REMOVED>:8009), err=-110
> >
> > [Fri Jul 07 09:59:49 2006] [error] ajp_get_reply::jk_ajp_common.c
> (1503):
> > Tomcat is down or refused connection. No response has been sent to the
> > client (yet)
> >
> > [Fri Jul 07 09:59:49 2006] [info]  ajp_service::jk_ajp_common.c (1721):
> > Receiving from tomcat failed, recoverable operation attempt=2
> >
> > [Fri Jul 07 09:59:49 2006] [info]  ajp_service::jk_ajp_common.c (1749):
> > Sending request to tomcat failed,  recoverable operation attempt=3
> >
> > [Fri Jul 07 09:59:49 2006] [error] ajp_service::jk_ajp_common.c (1758):
> > Error connecting to tomcat. Tomcat is probably not started or is
> listening
> > on the wrong port. worker=jvm18 failed
> >
> > [Fri Jul 07 09:59:49 2006] [info]  service::jk_lb_worker.c (696):
> service
> > failed, worker jvm18 is in error state
> > [Fri Jul 07 09:59:49 2006] [error]
> > ajp_connection_tcp_get_message::jk_ajp_common.c (961): Can't receive the
> > response message from tomcat, network problems or tomcat is down (<IP
> > REMOVED>:8009), err=-110
> >
> > [Fri Jul 07 09:59:49 2006] [error] ajp_get_reply::jk_ajp_common.c
> (1503):
> > Tomcat is down or refused connection. No response has been sent to the
> > client (yet)
> >
> > [Fri Jul 07 09:59:49 2006] [info]  ajp_service::jk_ajp_common.c (1721):
> > Receiving from tomcat failed, recoverable operation attempt=2
> >
> > [Fri Jul 07 09:59:49 2006] [info]  ajp_service::jk_ajp_common.c (1749):
> > Sending request to tomcat failed,  recoverable operation attempt=3
> >
> > [Fri Jul 07 09:59:49 2006] [error] ajp_service::jk_ajp_common.c (1758):
> > Error connecting to tomcat. Tomcat is probably not started or is
> listening
> > on the wrong port. worker=jvm17 failed
> >
> > [Fri Jul 07 09:59:49 2006] [info]  service::jk_lb_worker.c (696):
> service
> > failed, worker jvm17 is in error state
> > [Fri Jul 07 09:59:49 2006] [error]
> > ajp_connection_tcp_get_message::jk_ajp_common.c (961): Can't receive the
> > response message from tomcat, network problems or tomcat is down (<IP
> > REMOVED>:8009), err=-110
> >
> > [Fri Jul 07 09:59:49 2006] [error] ajp_get_reply::jk_ajp_common.c
> (1503):
> > Tomcat is down or refused connection. No response has been sent to the
> > client (yet)
> >
> > [Fri Jul 07 09:59:49 2006] [info]  ajp_service::jk_ajp_common.c (1721):
> > Receiving from tomcat failed, recoverable operation attempt=1
> >
> > [Fri Jul 07 09:59:49 2006] [info]  ajp_service::jk_ajp_common.c (1749):
> > Sending request to tomcat failed,  recoverable operation attempt=2
> >
> > [Fri Jul 07 09:59:49 2006] [error]
> > ajp_connection_tcp_get_message::jk_ajp_common.c (961): Can't receive the
> > response message from tomcat, network problems or tomcat is down (<IP
> > REMOVED>:8009), err=-110
> >
> > [Fri Jul 07 09:59:49 2006] [error] ajp_get_reply::jk_ajp_common.c
> (1503):
> > Tomcat is down or refused connection. No response has been sent to the
> > client (yet)
> >
> > [Fri Jul 07 09:59:49 2006] [info]  ajp_service::jk_ajp_common.c (1721):
> > Receiving from tomcat failed, recoverable operation attempt=0
> >
> > [Fri Jul 07 09:59:49 2006] [info]  ajp_service::jk_ajp_common.c (1749):
> > Sending request to tomcat failed,  recoverable operation attempt=1
> >
> > [Fri Jul 07 09:59:51 2006] [error]
> > ajp_connection_tcp_get_message::jk_ajp_common.c (961): Can't receive the
> > response message from tomcat, network problems or tomcat is down (<IP
> > REMOVED>:8009), err=-110
> >
> > [Fri Jul 07 09:59:51 2006] [error] ajp_get_reply::jk_ajp_common.c
> (1503):
> > Tomcat is down or refused connection. No response has been sent to the
> > client (yet)
> >
> > [Fri Jul 07 09:59:51 2006] [info]  ajp_service::jk_ajp_common.c (1721):
> > Receiving from tomcat failed, recoverable operation attempt=1
> >
> > [Fri Jul 07 09:59:51 2006] [info]  ajp_service::jk_ajp_common.c (1749):
> > Sending request to tomcat failed,  recoverable operation attempt=2
> >
> > [Fri Jul 07 09:59:51 2006] [error]
> > ajp_connection_tcp_get_message::jk_ajp_common.c (961): Can't receive the
> > response message from tomcat, network problems or tomcat is down (<IP
> > REMOVED>:8009), err=-110
> >
> > [Fri Jul 07 09:59:51 2006] [error] ajp_get_reply::jk_ajp_common.c
> (1503):
> > Tomcat is down or refused connection. No response has been sent to the
> > client (yet)
> >
> > [Fri Jul 07 09:59:51 2006] [info]  ajp_service::jk_ajp_common.c (1721):
> > Receiving from tomcat failed, recoverable operation attempt=0
> >
> > [Fri Jul 07 09:59:51 2006] [info]  ajp_service::jk_ajp_common.c (1749):
> > Sending request to tomcat failed,  recoverable operation attempt=1
> >
> > [Fri Jul 07 09:59:52 2006] [info]  jk_open_socket::jk_connect.c (444):
> > connect to 10.0.110.11:8009 failed with errno=110
> >
> > [Fri Jul 07 09:59:52 2006]
> > [info]  ajp_connect_to_endpoint::jk_ajp_common.c
> > (889): Failed opening socket to ( 10.0.110.11:8009) with (errno=110)
> >
> > [Fri Jul 07 09:59:52 2006] [info]  ajp_send_request::jk_ajp_common.c
> > (1248):
> > Error connecting to the Tomcat process.
> > [Fri Jul 07 09:59:52 2006] [info]  ajp_service::jk_ajp_common.c (1749):
> > Sending request to tomcat failed,  recoverable operation attempt=3
> >
> > [Fri Jul 07 09:59:52 2006] [error] ajp_service::jk_ajp_common.c (1758):
> > Error connecting to tomcat. Tomcat is probably not started or is
> listening
> > on the wrong port. worker=jvm11 failed
> >
> > [Fri Jul 07 09:59:52 2006] [info]  service::jk_lb_worker.c (696):
> service
> > failed, worker jvm11 is in error state
> > [Fri Jul 07 09:59:52 2006] [error]
> > ajp_connection_tcp_get_message::jk_ajp_common.c (961): Can't receive the
> > response message from tomcat, network problems or tomcat is down (<IP
> > REMOVED>:8009), err=-110
> >
> > [Fri Jul 07 09:59:52 2006] [error] ajp_get_reply::jk_ajp_common.c
> (1503):
> > Tomcat is down or refused connection. No response has been sent to the
> > client (yet)
> >
> > [Fri Jul 07 09:59:52 2006] [info]  ajp_service::jk_ajp_common.c (1721):
> > Receiving from tomcat failed, recoverable operation attempt=0
> >
> > [Fri Jul 07 09:59:52 2006] [info]  ajp_service::jk_ajp_common.c (1749):
> > Sending request to tomcat failed,  recoverable operation attempt=1
> >
> > [Fri Jul 07 09:59:53 2006] [error]
> > ajp_connection_tcp_get_message::jk_ajp_common.c (961): Can't receive the
> > response message from tomcat, network problems or tomcat is down (<IP
> > REMOVED>:8009), err=-110
> >
> > [Fri Jul 07 09:59:53 2006] [error] ajp_get_reply::jk_ajp_common.c
> (1503):
> > Tomcat is down or refused connection. No response has been sent to the
> > client (yet)
> >
> > [Fri Jul 07 09:59:53 2006] [info]  ajp_service::jk_ajp_common.c (1721):
> > Receiving from tomcat failed, recoverable operation attempt=1
> >
> > [Fri Jul 07 09:59:53 2006] [info]  ajp_service::jk_ajp_common.c (1749):
> > Sending request to tomcat failed,  recoverable operation attempt=2
> >
> > [Fri Jul 07 09:59:53 2006] [error]
> > ajp_connection_tcp_get_message::jk_ajp_common.c (961): Can't receive the
> > response message from tomcat, network problems or tomcat is down (<IP
> > REMOVED>:8009), err=-110
> >
> > [Fri Jul 07 09:59:53 2006] [error] ajp_get_reply::jk_ajp_common.c
> (1503):
> > Tomcat is down or refused connection. No response has been sent to the
> > client (yet)
> >
> > [Fri Jul 07 09:59:53 2006] [info]  ajp_service::jk_ajp_common.c (1721):
> > Receiving from tomcat failed, recoverable operation attempt=1
> >
> > [Fri Jul 07 09:59:53 2006] [info]  ajp_service::jk_ajp_common.c (1749):
> > Sending request to tomcat failed,  recoverable operation attempt=2
> >
> > [Fri Jul 07 09:59:53 2006] [error]
> > ajp_connection_tcp_get_message::jk_ajp_common.c (961): Can't receive the
> > response message from tomcat, network problems or tomcat is down (<IP
> > REMOVED>:8009), err=-110
> >
> > [Fri Jul 07 09:59:53 2006] [error] ajp_get_reply::jk_ajp_common.c
> (1503):
> > Tomcat is down or refused connection. No response has been sent to the
> > client (yet)
> >
> > [Fri Jul 07 09:59:53 2006] [info]  ajp_service::jk_ajp_common.c (1721):
> > Receiving from tomcat failed, recoverable operation attempt=1
> >
> > [Fri Jul 07 09:59:53 2006] [info]  ajp_service::jk_ajp_common.c (1749):
> > Sending request to tomcat failed,  recoverable operation attempt=2
> >
> > [Fri Jul 07 09:59:53 2006] [error]
> > ajp_connection_tcp_get_message::jk_ajp_common.c (961): Can't receive the
> > response message from tomcat, network problems or tomcat is down (<IP
> > REMOVED>:8009), err=-110
> >
> > [Fri Jul 07 09:59:53 2006] [error] ajp_get_reply::jk_ajp_common.c
> (1503):
> > Tomcat is down or refused connection. No response has been sent to the
> > client (yet)
> >
> > [Fri Jul 07 09:59:53 2006] [info]  ajp_service::jk_ajp_common.c (1721):
> > Receiving from tomcat failed, recoverable operation attempt=0
> >
> > [Fri Jul 07 09:59:53 2006] [info]  ajp_service::jk_ajp_common.c (1749):
> > Sending request to tomcat failed,  recoverable operation attempt=1
> >
> > [Fri Jul 07 09:59:54 2006] [info]  jk_open_socket::jk_connect.c (444):
> > connect to 10.0.110.11:8009 failed with errno=110
> >
> > [Fri Jul 07 09:59:54 2006]
> > [info]  ajp_connect_to_endpoint::jk_ajp_common.c
> > (889): Failed opening socket to ( 10.0.110.11:8009) with (errno=110)
> >
> > [Fri Jul 07 09:59:54 2006] [info]  ajp_send_request::jk_ajp_common.c
> > (1248):
> > Error connecting to the Tomcat process.
> > [Fri Jul 07 09:59:54 2006] [info]  ajp_service::jk_ajp_common.c (1749):
> > Sending request to tomcat failed,  recoverable operation attempt=3
> >
> > [Fri Jul 07 09:59:54 2006] [error] ajp_service::jk_ajp_common.c (1758):
> > Error connecting to tomcat. Tomcat is probably not started or is
> listening
> > on the wrong port. worker=jvm11 failed
> >
> > [Fri Jul 07 09:59:54 2006] [info]  service::jk_lb_worker.c (696):
> service
> > failed, worker jvm11 is in error state
> > [Fri Jul 07 09:59:56 2006] [error]
> > ajp_connection_tcp_get_message::jk_ajp_common.c (961): Can't receive the
> > response message from tomcat, network problems or tomcat is down (<IP
> > REMOVED>:8009), err=-110
> >
> > [Fri Jul 07 09:59:56 2006] [error] ajp_get_reply::jk_ajp_common.c
> (1503):
> > Tomcat is down or refused connection. No response has been sent to the
> > client (yet)
> >
> > [Fri Jul 07 09:59:56 2006] [info]  ajp_service::jk_ajp_common.c (1721):
> > Receiving from tomcat failed, recoverable operation attempt=0
> >
> > [Fri Jul 07 09:59:56 2006] [info]  ajp_service::jk_ajp_common.c (1749):
> > Sending request to tomcat failed,  recoverable operation attempt=1
> >
> > [Fri Jul 07 09:59:56 2006] [error]
> > ajp_connection_tcp_get_message::jk_ajp_common.c (961): Can't receive the
> > response message from tomcat, network problems or tomcat is down (<IP
> > REMOVED>:8009), err=-110
> >
> > [Fri Jul 07 09:59:56 2006] [error] ajp_get_reply::jk_ajp_common.c
> (1503):
> > Tomcat is down or refused connection. No response has been sent to the
> > client (yet)
> >
> > [Fri Jul 07 09:59:56 2006] [info]  ajp_service::jk_ajp_common.c (1721):
> > Receiving from tomcat failed, recoverable operation attempt=0
> >
> > [Fri Jul 07 09:59:56 2006] [info]  ajp_service::jk_ajp_common.c (1749):
> > Sending request to tomcat failed,  recoverable operation attempt=1
> >
> > [Fri Jul 07 09:59:56 2006] [error]
> > ajp_connection_tcp_get_message::jk_ajp_common.c (961): Can't receive the
> > response message from tomcat, network problems or tomcat is down (<IP
> > REMOVED>:8009), err=-110
> >
> > [Fri Jul 07 09:59:56 2006] [error] ajp_get_reply::jk_ajp_common.c
> (1503):
> > Tomcat is down or refused connection. No response has been sent to the
> > client (yet)
> >
> > [Fri Jul 07 09:59:56 2006] [info]  ajp_service::jk_ajp_common.c (1721):
> > Receiving from tomcat failed, recoverable operation attempt=1
> >
> > [Fri Jul 07 09:59:56 2006] [info]  ajp_service::jk_ajp_common.c (1749):
> > Sending request to tomcat failed,  recoverable operation attempt=2
> >
> > [Fri Jul 07 09:59:56 2006] [error]
> > ajp_connection_tcp_get_message::jk_ajp_common.c (961): Can't receive the
> > response message from tomcat, network problems or tomcat is down (<IP
> > REMOVED>:8009), err=-110
> >
> > [Fri Jul 07 09:59:56 2006] [error] ajp_get_reply::jk_ajp_common.c
> (1503):
> > Tomcat is down or refused connection. No response has been sent to the
> > client (yet)
> >
> > [Fri Jul 07 09:59:56 2006] [info]  ajp_service::jk_ajp_common.c (1721):
> > Receiving from tomcat failed, recoverable operation attempt=2
> >
> > [Fri Jul 07 09:59:56 2006] [info]  ajp_service::jk_ajp_common.c (1749):
> > Sending request to tomcat failed,  recoverable operation attempt=3
> >
> > [Fri Jul 07 09:59:56 2006] [error] ajp_service::jk_ajp_common.c (1758):
> > Error connecting to tomcat. Tomcat is probably not started or is
> listening
> > on the wrong port. worker=jvm18 failed
> >
> > [Fri Jul 07 09:59:56 2006] [info]  service::jk_lb_worker.c (696):
> service
> > failed, worker jvm18 is in error state
> > [Fri Jul 07 09:59:57 2006] [error]
> > ajp_connection_tcp_get_message::jk_ajp_common.c (961): Can't receive the
> > response message from tomcat, network problems or tomcat is down (<IP
> > REMOVED>:8009), err=-110
> >
> > [Fri Jul 07 09:59:57 2006] [error] ajp_get_reply::jk_ajp_common.c
> (1503):
> > Tomcat is down or refused connection. No response has been sent to the
> > client (yet)
> >
> > [Fri Jul 07 09:59:57 2006] [info]  ajp_service::jk_ajp_common.c (1721):
> > Receiving from tomcat failed, recoverable operation attempt=1
> >
> > [Fri Jul 07 09:59:57 2006] [info]  ajp_service::jk_ajp_common.c (1749):
> > Sending request to tomcat failed,  recoverable operation attempt=2
> >
> > [Fri Jul 07 09:59:57 2006] [error]
> > ajp_connection_tcp_get_message::jk_ajp_common.c (961): Can't receive the
> > response message from tomcat, network problems or tomcat is down (<IP
> > REMOVED>:8009), err=-110
> >
> > [Fri Jul 07 09:59:57 2006] [error] ajp_get_reply::jk_ajp_common.c
> (1503):
> > Tomcat is down or refused connection. No response has been sent to the
> > client (yet)
> >
> > [Fri Jul 07 09:59:57 2006] [info]  ajp_service::jk_ajp_common.c (1721):
> > Receiving from tomcat failed, recoverable operation attempt=1
> >
> > [Fri Jul 07 09:59:57 2006] [info]  ajp_service::jk_ajp_common.c (1749):
> > Sending request to tomcat failed,  recoverable operation attempt=2
> >
> > [Fri Jul 07 09:59:58 2006] [error]
> > ajp_connection_tcp_get_message::jk_ajp_common.c (961): Can't receive the
> > response message from tomcat, network problems or tomcat is down (<IP
> > REMOVED>:8009), err=-110
> >
> > [Fri Jul 07 09:59:58 2006] [error] ajp_get_reply::jk_ajp_common.c
> (1503):
> > Tomcat is down or refused connection. No response has been sent to the
> > client (yet)
> >
> > [Fri Jul 07 09:59:58 2006] [info]  ajp_service::jk_ajp_common.c (1721):
> > Receiving from tomcat failed, recoverable operation attempt=0
> >
> > [Fri Jul 07 09:59:58 2006] [info]  ajp_service::jk_ajp_common.c (1749):
> > Sending request to tomcat failed,  recoverable operation attempt=1
> >
> > [Fri Jul 07 10:00:00 2006] [error]
> > ajp_connection_tcp_get_message::jk_ajp_common.c (961): Can't receive the
> > response message from tomcat, network problems or tomcat is down (<IP
> > REMOVED>:8009), err=-110
> >
> > [Fri Jul 07 10:00:00 2006] [error] ajp_get_reply::jk_ajp_common.c
> (1503):
> > Tomcat is down or refused connection. No response has been sent to the
> > client (yet)
> >
> > [Fri Jul 07 10:00:00 2006] [info]  ajp_service::jk_ajp_common.c (1721):
> > Receiving from tomcat failed, recoverable operation attempt=1
> >
> > [Fri Jul 07 10:00:00 2006] [info]  ajp_service::jk_ajp_common.c (1749):
> > Sending request to tomcat failed,  recoverable operation attempt=2
> >
> > [Fri Jul 07 10:00:01 2006] [error]
> > ajp_connection_tcp_get_message::jk_ajp_common.c (961): Can't receive the
> > response message from tomcat, network problems or tomcat is down (<IP
> > REMOVED>:8009), err=-110
> >
> > [Fri Jul 07 10:00:01 2006] [error] ajp_get_reply::jk_ajp_common.c
> (1503):
> > Tomcat is down or refused connection. No response has been sent to the
> > client (yet)
> >
> > [Fri Jul 07 10:00:01 2006] [info]  ajp_service::jk_ajp_common.c (1721):
> > Receiving from tomcat failed, recoverable operation attempt=0
> >
> > [Fri Jul 07 10:00:01 2006] [info]  ajp_service::jk_ajp_common.c (1749):
> > Sending request to tomcat failed,  recoverable operation attempt=1
> >
> > [Fri Jul 07 10:00:03 2006] [error]
> > ajp_connection_tcp_get_message::jk_ajp_common.c (961): Can't receive the
> > response message from tomcat, network problems or tomcat is down (<IP
> > REMOVED>:8009), err=-110
> >
> > [Fri Jul 07 10:00:03 2006] [error] ajp_get_reply::jk_ajp_common.c
> (1503):
> > Tomcat is down or refused connection. No response has been sent to the
> > client (yet)
> >
> > [Fri Jul 07 10:00:03 2006] [info]  ajp_service::jk_ajp_common.c (1721):
> > Receiving from tomcat failed, recoverable operation attempt=0
> >
> > [Fri Jul 07 10:00:03 2006] [info]  ajp_service::jk_ajp_common.c (1749):
> > Sending request to tomcat failed,  recoverable operation attempt=1
> >
> > [Fri Jul 07 10:00:04 2006] [error]
> > ajp_connection_tcp_get_message::jk_ajp_common.c (961): Can't receive the
> > response message from tomcat, network problems or tomcat is down (<IP
> > REMOVED>:8009), err=-110
> >
> > [Fri Jul 07 10:00:04 2006] [error] ajp_get_reply::jk_ajp_common.c
> (1503):
> > Tomcat is down or refused connection. No response has been sent to the
> > client (yet)
> >
> > [Fri Jul 07 10:00:04 2006] [info]  ajp_service::jk_ajp_common.c (1721):
> > Receiving from tomcat failed, recoverable operation attempt=0
> >
> > [Fri Jul 07 10:00:04 2006] [info]  ajp_service::jk_ajp_common.c (1749):
> > Sending request to tomcat failed,  recoverable operation attempt=1
> >
> > [Fri Jul 07 10:00:05 2006] [error]
> > ajp_connection_tcp_get_message::jk_ajp_common.c (961): Can't receive the
> > response message from tomcat, network problems or tomcat is down (<IP
> > REMOVED>:8009), err=-110
> >
> > [Fri Jul 07 10:00:05 2006] [error] ajp_get_reply::jk_ajp_common.c
> (1503):
> > Tomcat is down or refused connection. No response has been sent to the
> > client (yet)
> >
> > [Fri Jul 07 10:00:05 2006] [info]  ajp_service::jk_ajp_common.c (1721):
> > Receiving from tomcat failed, recoverable operation attempt=0
> >
> > [Fri Jul 07 10:00:05 2006] [info]  ajp_service::jk_ajp_common.c (1749):
> > Sending request to tomcat failed,  recoverable operation attempt=1
> >
> > [Fri Jul 07 10:00:06 2006] [info]  jk_open_socket::jk_connect.c (444):
> > connect to 10.0.110.17:8009 failed with errno=110
> >
> > [Fri Jul 07 10:00:06 2006]
> > [info]  ajp_connect_to_endpoint::jk_ajp_common.c
> > (889): Failed opening socket to ( 10.0.110.17:8009) with (errno=110)
> >
> > [Fri Jul 07 10:00:06 2006] [info]  ajp_send_request::jk_ajp_common.c
> > (1248):
> > Error connecting to the Tomcat process.
> > [Fri Jul 07 10:00:06 2006] [info]  ajp_service::jk_ajp_common.c (1749):
> > Sending request to tomcat failed,  recoverable operation attempt=2
> >
> > [Fri Jul 07 10:00:06 2006] [error]
> > ajp_connection_tcp_get_message::jk_ajp_common.c (961): Can't receive the
> > response message from tomcat, network problems or tomcat is down (<IP
> > REMOVED>:8009), err=-110
> >
> > [Fri Jul 07 10:00:06 2006] [error] ajp_get_reply::jk_ajp_common.c
> (1503):
> > Tomcat is down or refused connection. No response has been sent to the
> > client (yet)
> >
> > [Fri Jul 07 10:00:06 2006] [info]  ajp_service::jk_ajp_common.c (1721):
> > Receiving from tomcat failed, recoverable operation attempt=0
> >
> > [Fri Jul 07 10:00:06 2006] [info]  ajp_service::jk_ajp_common.c (1749):
> > Sending request to tomcat failed,  recoverable operation attempt=1
> >
> > [Fri Jul 07 10:00:08 2006] [error]
> > ajp_connection_tcp_get_message::jk_ajp_common.c (961): Can't receive the
> > response message from tomcat, network problems or tomcat is down (<IP
> > REMOVED>:8009), err=-110
> >
> > [Fri Jul 07 10:00:08 2006] [error] ajp_get_reply::jk_ajp_common.c
> (1503):
> > Tomcat is down or refused connection. No response has been sent to the
> > client (yet)
> >
> > [Fri Jul 07 10:00:08 2006] [info]  ajp_service::jk_ajp_common.c (1721):
> > Receiving from tomcat failed, recoverable operation attempt=1
> >
> > [Fri Jul 07 10:00:08 2006] [info]  ajp_service::jk_ajp_common.c (1749):
> > Sending request to tomcat failed,  recoverable operation attempt=2
> >
> > [Fri Jul 07 10:00:09 2006] [error]
> > ajp_connection_tcp_get_message::jk_ajp_common.c (961): Can't receive the
> > response message from tomcat, network problems or tomcat is down (<IP
> > REMOVED>:8009), err=-110
> >
> > [Fri Jul 07 10:00:09 2006] [error] ajp_get_reply::jk_ajp_common.c
> (1503):
> > Tomcat is down or refused connection. No response has been sent to the
> > client (yet)
> >
> > [Fri Jul 07 10:00:09 2006] [info]  ajp_service::jk_ajp_common.c (1721):
> > Receiving from tomcat failed, recoverable operation attempt=1
> >
> > [Fri Jul 07 10:00:09 2006] [info]  ajp_service::jk_ajp_common.c (1749):
> > Sending request to tomcat failed,  recoverable operation attempt=2
> >
> > [Fri Jul 07 10:00:10 2006] [error]
> > ajp_connection_tcp_get_message::jk_ajp_common.c (961): Can't receive the
> > response message from tomcat, network problems or tomcat is down (<IP
> > REMOVED>:8009), err=-110
> >
> > [Fri Jul 07 10:00:10 2006] [error] ajp_get_reply::jk_ajp_common.c
> (1503):
> > Tomcat is down or refused connection. No response has been sent to the
> > client (yet)
> >
> > [Fri Jul 07 10:00:10 2006] [info]  ajp_service::jk_ajp_common.c (1721):
> > Receiving from tomcat failed, recoverable operation attempt=1
> >
> > [Fri Jul 07 10:00:10 2006] [info]  ajp_service::jk_ajp_common.c (1749):
> > Sending request to tomcat failed,  recoverable operation attempt=2
> >
> > [Fri Jul 07 10:00:10 2006] [error]
> > ajp_connection_tcp_get_message::jk_ajp_common.c (961): Can't receive the
> > response message from tomcat, network problems or tomcat is down (<IP
> > REMOVED>:8009), err=-110
> >
> > [Fri Jul 07 10:00:10 2006] [error] ajp_get_reply::jk_ajp_common.c
> (1503):
> > Tomcat is down or refused connection. No response has been sent to the
> > client (yet)
> >
> > [Fri Jul 07 10:00:10 2006] [info]  ajp_service::jk_ajp_common.c (1721):
> > Receiving from tomcat failed, recoverable operation attempt=1
> >
> > [Fri Jul 07 10:00:10 2006] [info]  ajp_service::jk_ajp_common.c (1749):
> > Sending request to tomcat failed,  recoverable operation attempt=2
> >
> > [Fri Jul 07 10:00:14 2006] [error]
> > ajp_connection_tcp_get_message::jk_ajp_common.c (961): Can't receive the
> > response message from tomcat, network problems or tomcat is down (<IP
> > REMOVED>:8009), err=-110
> >
> > [Fri Jul 07 10:00:14 2006] [error] ajp_get_reply::jk_ajp_common.c
> (1503):
> > Tomcat is down or refused connection. No response has been sent to the
> > client (yet)
> >
> > [Fri Jul 07 10:00:14 2006] [info]  ajp_service::jk_ajp_common.c (1721):
> > Receiving from tomcat failed, recoverable operation attempt=2
> >
> > [Fri Jul 07 10:00:14 2006] [info]  ajp_service::jk_ajp_common.c (1749):
> > Sending request to tomcat failed,  recoverable operation attempt=3
> >
> > [Fri Jul 07 10:00:14 2006] [error] ajp_service::jk_ajp_common.c (1758):
> > Error connecting to tomcat. Tomcat is probably not started or is
> listening
> > on the wrong port. worker=jvm18 failed
> >
> > [Fri Jul 07 10:00:14 2006] [info]  service::jk_lb_worker.c (696):
> service
> > failed, worker jvm18 is in error state
> > [Fri Jul 07 10:00:14 2006] [error]
> > ajp_connection_tcp_get_message::jk_ajp_common.c (961): Can't receive the
> > response message from tomcat, network problems or tomcat is down (<IP
> > REMOVED>:8009), err=-110
> >
> > [Fri Jul 07 10:00:14 2006] [error] ajp_get_reply::jk_ajp_common.c
> (1503):
> > Tomcat is down or refused connection. No response has been sent to the
> > client (yet)
> >
> > [Fri Jul 07 10:00:14 2006] [info]  ajp_service::jk_ajp_common.c (1721):
> > Receiving from tomcat failed, recoverable operation attempt=1
> >
> > [Fri Jul 07 10:00:14 2006] [info]  ajp_service::jk_ajp_common.c (1749):
> > Sending request to tomcat failed,  recoverable operation attempt=2
> >
> > [Fri Jul 07 10:00:14 2006] [error]
> > ajp_connection_tcp_get_message::jk_ajp_common.c (961): Can't receive the
> > response message from tomcat, network problems or tomcat is down (<IP
> > REMOVED>:8009), err=-110
> >
> > [Fri Jul 07 10:00:14 2006] [error] ajp_get_reply::jk_ajp_common.c
> (1503):
> > Tomcat is down or refused connection. No response has been sent to the
> > client (yet)
> >
> > [Fri Jul 07 10:00:14 2006] [info]  ajp_service::jk_ajp_common.c (1721):
> > Receiving from tomcat failed, recoverable operation attempt=1
> >
> > [Fri Jul 07 10:00:14 2006] [info]  ajp_service::jk_ajp_common.c (1749):
> > Sending request to tomcat failed,  recoverable operation attempt=2
> >
> > [Fri Jul 07 10:00:15 2006] [error]
> > ajp_connection_tcp_get_message::jk_ajp_common.c (961): Can't receive the
> > response message from tomcat, network problems or tomcat is down (<IP
> > REMOVED>:8009), err=-110
> >
> > [Fri Jul 07 10:00:15 2006] [error] ajp_get_reply::jk_ajp_common.c
> (1503):
> > Tomcat is down or refused connection. No response has been sent to the
> > client (yet)
> >
> > [Fri Jul 07 10:00:15 2006] [info]  ajp_service::jk_ajp_common.c (1721):
> > Receiving from tomcat failed, recoverable operation attempt=2
> >
> > [Fri Jul 07 10:00:15 2006] [info]  ajp_service::jk_ajp_common.c (1749):
> > Sending request to tomcat failed,  recoverable operation attempt=3
> >
> > [Fri Jul 07 10:00:15 2006] [error] ajp_service::jk_ajp_common.c (1758):
> > Error connecting to tomcat. Tomcat is probably not started or is
> listening
> > on the wrong port. worker=jvm12 failed
> >
> > [Fri Jul 07 10:00:15 2006] [info]  service::jk_lb_worker.c (696):
> service
> > failed, worker jvm12 is in error state
> > [Fri Jul 07 10:00:15 2006] [error]
> > ajp_connection_tcp_get_message::jk_ajp_common.c (961): Can't receive the
> > response message from tomcat, network problems or tomcat is down (
> > 10.0.110.17:8009), err=-110
> >
> > [Fri Jul 07 09:59:45 2006] [info]  ajp_service::jk_ajp_common.c (1749):
> > Sending request to tomcat failed,  recoverable operation attempt=1
> >
> >
> > In reply to:
> >
> > if you would give detailed information about your problems, we could
> > advise you, whether it is known, and whether it has been fixed in some
> > version.
> >
> > The latest release is 1.2.15, we tried to produce a 1.2.16 release, that
> > but it has now been withdrawn because of a regression bug. Another
> > release (1.2.17) will be tried next week.
> >
> > Rainer
> >
> > Edmon Begoli schrieb:
> > > We are running into some serious load and scalability issues related
> to
> > the
> > > mod_jk.
> > >
> > > I read some threads that indicate that these issues may have been
> fixed
> > in
> > > post 1.2.15 version.
> > >
> > > Available downoalds are only for 1.2.15.
> > >
> > > Some websites are indicating that the latest one should be 1.2.16.
> > >
> > > Can someone please tell me what is the latest version of mod_jk that
> we
> > > should be using.
> > >
> > >
> > > We are running 1.2.15 complied on RedHat ES 4.2.x. with Apache 2.0.52
> > >
> >
> >
> > --
> > Thank you,
> > Edmon
> >
> >
>
> ------=_Part_105786_9330282.1152503998253--
>
>
>


-- 
Thank you,
Edmon Begoli
http://blogs.ittoolbox.com/eai/software

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