On 15.07.2010 15:23, Rocky Chak wrote:
Hi,
I have a application using Apache 2.2.15, Mod_jk and Jboss 4.2.1. Apache
and Jboss Running fine till now. Suddenly there is an issue of slow
browsing and later it stopped serving pages.
We moved to backup server and now trying to fix this one.
When Application deployed on Jboss and Jboss run on Port 80 .. Application
access& functionality is PERFECT.
When Apache is on a different machine with same configuration of the present
host with mod_jk ... .. Application access& functionality is PERFECT.
But when Apache and Jboss are configured on the same machine with Jboss on
8080 ( Anyway this port is not required as AJP uses 8009 port ) -
Application is behaving in weird fashion. JSP Pages in the application are
not rendered fully. No error is displayed in Apache access_log.
But mod_jk.log shows these errors:
[Thu Jul 15 08:24:39 2010][29201:3086371680] [info]
ajp_process_callback::jk_ajp_common.c (1788): Writing to client aborted or
client network problems
[Thu Jul 15 08:24:39 2010][29201:3086371680] [info]
ajp_service::jk_ajp_common.c (2447): (node1) sending request to tomcat
failed (unrecoverable), because of client write error (attempt=1)
[Thu Jul 15 08:24:41 2010][29201:3086371680] [info] service::jk_lb_worker.c
(1384): service failed, worker node1 is in local error state
[Thu Jul 15 08:24:41 2010][29201:3086371680] [info] service::jk_lb_worker.c
(1403): unrecoverable error 200, request failed. Client failed in the middle
of request, we can't recover to another instance.
[Thu Jul 15 08:24:41 2010]loadbalancer abc.xyz.com 70.790837 (url removed by
me)
[Thu Jul 15 08:24:41 2010][29201:3086371680] [info] jk_handler::mod_jk.c
(2608): Aborting connection for worker=loadbalancer
[Thu Jul 15 08:24:48 2010][29199:3086371680] [info]
ajp_process_callback::jk_ajp_common.c (1788): Writing to client aborted or
client network problems
[Thu Jul 15 08:24:48 2010][29199:3086371680] [info]
ajp_service::jk_ajp_common.c (2447): (node1) sending request to tomcat
failed (unrecoverable), because of client write error (attempt=1)
[Thu Jul 15 08:24:50 2010][29199:3086371680] [info] service::jk_lb_worker.c
(1384): service failed, worker node1 is in local error state
[Thu Jul 15 08:24:50 2010][29199:3086371680] [info] service::jk_lb_worker.c
(1403): unrecoverable error 200, request failed. Client failed in the middle
of request, we can't recover to another instance.
[Thu Jul 15 08:24:50 2010]loadbalancer abc.xyz.com 10.869269
[Thu Jul 15 08:24:50 2010][29199:3086371680] [info] jk_handler::mod_jk.c
(2608): Aborting connection for worker=loadbalancer
[Thu Jul 15 08:24:52 2010][29195:3086371680] [info]
ajp_process_callback::jk_ajp_common.c (1788): Writing to client aborted or
client network problems
[Thu Jul 15 08:24:52 2010][29195:3086371680] [info]
ajp_service::jk_ajp_common.c (2447): (node1) sending request to tomcat
failed (unrecoverable), because of client write error (attempt=1)
[Thu Jul 15 08:24:54 2010][29195:3086371680] [info] service::jk_lb_worker.c
(1384): service failed, worker node1 is in local error state
[Thu Jul 15 08:24:54 2010][29195:3086371680] [info] service::jk_lb_worker.c
(1403): unrecoverable error 200, request failed. Client failed in the middle
of request, we can't recover to another instance.
[Thu Jul 15 08:24:54 2010]loadbalancer abc.xyz.com 6.253777
[Thu Jul 15 08:24:54 2010][29195:3086371680] [info] jk_handler::mod_jk.c
(2608): Aborting connection for worker=loadbalancer
[Thu Jul 15 08:24:55 2010][29198:3086371680] [info]
ajp_process_callback::jk_ajp_common.c (1788): Writing to client aborted or
client network problems
[Thu Jul 15 08:24:55 2010][29198:3086371680] [info]
ajp_service::jk_ajp_common.c (2447): (node1) sending request to tomcat
failed (unrecoverable), because of client write error (attempt=1)
[Thu Jul 15 08:24:57 2010][29198:3086371680] [info] service::jk_lb_worker.c
(1384): service failed, worker node1 is in local error state
[Thu Jul 15 08:24:57 2010][29198:3086371680] [info] service::jk_lb_worker.c
(1403): unrecoverable error 200, request failed. Client failed in the middle
of request, we can't recover to another instance.
This error occurs whenever there is a request.
Can somebody please help why this is happening.
What's your operating system?
The error means, that mod_jk wants to send back response packet via
Apache and Apache told mod_jk that it couldn't send the data to the
client/browser. Usually that means the connections has been closed by
the browser.
Occasional occurence of this (e.g. for 1 percent of all requests) is OK,
because typically it happens, when a user doesn't wait for the full
answer and instead proceeds clicking. Then the browser closes the
previous connection, likely with a connection reset, and starts a new
connection for the next request. The web server doesn't know about the
closed connection and only when it tries to send the next packet it gets
an error from the OS, that the connction is already closed.
1) Look at your Apache error log for related errors.
2) Can you reproduce the problem? If so:
- does it also happen, if you run the client on the same machine as
the server? Any other depenency on the client network?
- sniff all network traffic between the Apache port and your client
used for reproduction (not using the local host in this case). Look
whether the client actually closed the connection prematurely. If you
are using HTTP and not HTTPS, then you can easily see from the response
packets, whether the response was finished or not.
Note: we recently had a customr who observed the same problem. It turned
out, that indeed reset packets were send to the web erver. Checking the
MAC addresses revealed, those packets were not coming rom the browser,
but instead from some other network security device. Thi device decided
the traffic was malicious and send a reset packet. The traffic was not
going through the device, it simply sniffed the LAN traffic and inserted
a reset packet when it thought it would help security ...
Regards,
Rainer
---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org
For additional commands, e-mail: users-h...@tomcat.apache.org
