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From "Edmon Begoli" <ebeg...@gmail.com>
Subject Re: URGENT HELP NEEDED: mod_jk loadbalancing issues
Date Mon, 10 Jul 2006 03:42:02 GMT
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

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