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From "Ago Meister" <...@webmedia.ee>
Subject RE: mod_jk log file errors
Date Fri, 20 Sep 2002 15:46:13 GMT
Hi,

Yes, I increased Tomcat maxProcessors value and it seems to me
that it works.

kind regards,
Ago Meister

-----Original Message-----
From: Anthony Milbourne [mailto:anthony.milbourne@becta.org.uk]
Sent: 20. september 2002. a. 18:34
To: 'Tomcat Users List'
Subject: RE: mod_jk log file errors


Hi

We had similar looking errors to you (including some broken pipe messages in
catalina_log) and did a lot of searching for solutions.  There are a lot of
people posting about this sort of thing and no definitive answers that we
could find.

but...

We found a suggested solution which I will repeat.  We have implemented this
(along with other changes) and are in the process of checking whether it has
worked.

The suggestion was (and I would love someone to confirm this) that Apache is
accepting and passing to Tomcat more concurrent requests than Tomcat has
threads to deal with them.  Apache has a setting in httpd.conf called
MaxClients which is 150 by default - but the AJP Connector element in
Tomcats server.xml file defines the maxProcessors attribute to be 75 by
default.  The quickest fix is to up the maxProcessors value to 150.

If anyone can confirm that this mismatch could cause communication problems
over the mod_jk connector that would be very helpful.

I hope that helps,

	Anthony.

> -----Original Message-----
> From:	Ago Meister [SMTP:ago@webmedia.ee]
> Sent:	18 September 2002 18:10
> To:	Tomcat Users List
> Subject:	mod_jk log file errors
>
> Hello there,
>
> My mod_jk log file contains many error messages?
> We are using Apache 1.3.26 and Tomcat 4.0.4 with AJP13 and RH 6.2.
> Does anybody any ideas or has experience with similar problems?
>
>
> errors are:
>
> [Mon Sep 16 15:38:18 2002]  [jk_ajp_common.c (933)]: Error
> ajp_process_callback - write failed
> [Mon Sep 16 15:38:20 2002]  [jk_ajp_common.c (933)]: Error
> ajp_process_callback - write failed
> [Mon Sep 16 15:43:27 2002]  [jk_ajp_common.c (933)]: Error
> ajp_process_callback - write failed
> [Mon Sep 16 15:44:12 2002]  [jk_ajp_common.c (652)]:
> ajp_connection_tcp_get_message: Error - jk_tcp_socket_recvfull failed
> [Mon Sep 16 15:44:12 2002]  [jk_ajp_common.c (1013)]: Error reading reply
> [Mon Sep 16 15:44:12 2002]  [jk_ajp_common.c (1150)]: In
> jk_endpoint_t::service, ajp_get_reply failed in send loop 0
> [Mon Sep 16 15:44:12 2002]  [jk_ajp_common.c (652)]:
> ajp_connection_tcp_get_message: Error - jk_tcp_socket_recvfull failed
> [Mon Sep 16 15:44:12 2002]  [jk_ajp_common.c (1013)]: Error reading reply
> [Mon Sep 16 15:44:12 2002]  [jk_ajp_common.c (1150)]: In
> jk_endpoint_t::service, ajp_get_reply failed in send loop 0
> [Mon Sep 16 15:44:15 2002]  [jk_ajp_common.c (652)]:
> ajp_connection_tcp_get_message: Error - jk_tcp_socket_recvfull failed
> [Mon Sep 16 15:44:15 2002]  [jk_ajp_common.c (1013)]: Error reading reply
>
> and
>
> [Mon Sep 16 15:44:22 2002]  [jk_ajp_common.c (1153)]: In
> jk_endpoint_t::service, ajp_send_request failed in send loop 2
> [Mon Sep 16 15:44:22 2002]  [jk_ajp_common.c (652)]:
> ajp_connection_tcp_get_message: Error - jk_tcp_socket_recvfull failed
> [Mon Sep 16 15:44:22 2002]  [jk_ajp_common.c (1013)]: Error reading reply
> [Mon Sep 16 15:44:22 2002]  [jk_ajp_common.c (1150)]: In
> jk_endpoint_t::service, ajp_get_reply failed in send loop 1
> [Mon Sep 16 15:44:22 2002]  [jk_connect.c (151)]: jk_open_socket,
> connect()
> failed errno = 111
> [Mon Sep 16 15:44:22 2002]  [jk_ajp_common.c (599)]: In
> jk_endpoint_t::ajp_connect_to_endpoint, failed errno = 111
> [Mon Sep 16 15:44:22 2002]  [jk_ajp_common.c (844)]: Error connecting to
> the
> Tomcat process.
> [Mon Sep 16 15:44:22 2002]  [jk_ajp_common.c (1153)]: In
> jk_endpoint_t::service, ajp_send_request failed in send loop 2
> [Mon Sep 16 15:44:22 2002]  [jk_ajp_common.c (652)]:
> ajp_connection_tcp_get_message: Error - jk_tcp_socket_recvfull failed
> [Mon Sep 16 15:44:22 2002]  [jk_ajp_common.c (1013)]: Error reading reply
>
> kind regards,
> Ago Meister
>
>
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