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From "Hubert de Heer" <hdeh...@mirabeau.nl>
Subject mod_jk 1.2.27 strange default reply_timeout
Date Mon, 02 Feb 2009 14:35:14 GMT
Hi,


We have an environment running Apache 2.2.9, mod_jk 1.2.27 and Tomcat
5.5.27.

 

The following settings are in place:

 

Apache (prefork mode)

=====================

Timeout 60

KeepAliveTimeout 5

 

JkWatchdogInterval      90

JkOptions               +DisableReuse

 

worker.properties

=================

worker.host_1.type=ajp13

worker.host_1.host=127.0.0.1

worker.host_1.port=8009

worker.host_1.socket_keepalive=1

worker.host_1.socket_timeout=15

worker.host_1.connect_timeout=10000

worker.host_1.prepost_timeout=8000

worker.host_1.lbfactor=1

worker.host_1.ping_mode=A

worker.host_1.connection_pool_timeout=600

 

server.xml

==========

<Connector port="8009"

    maxThreads="750" minSpareThreads="25" maxSpareThreads="75"

    connectionTimeout="600000"

    enableLookups="false" redirectPort="8443" protocol="AJP/1.3" />

 

What we notice is that Apache will respond with an error 502 Bad Gateway
when a response takes more than 30sec.

This seems quite strange as without a reply_timeout set I would expect
the reply_timeout to default to 0 (timeout disabled).

The same setup with mod_jk 1.2.26 does not give this 502 Bad Gateway
error, can't find any information on a behavioural change regarding
reply timeouts.

 

The error from mod_jk logging:

 

[Mon Feb 02 13:45:18 2009] [8645:3086362304] [info]
ajp_connection_tcp_get_message::jk_ajp_common.c (1111): (host_1) can't
receive the response message from tomcat, network problems or tomcat
(127.0.0.1:8009) is down (errno=11)

[Mon Feb 02 13:45:18 2009] [8645:3086362304] [error]
ajp_get_reply::jk_ajp_common.c (1920): (host_1) Tomcat is down or
refused connection. No response has been sent to the client (yet)

[Mon Feb 02 13:45:18 2009] [8645:3086362304] [info]
ajp_service::jk_ajp_common.c (2407): (host_1) sending request to tomcat
failed (recoverable),  (attempt=2)

[Mon Feb 02 13:45:18 2009] [8645:3086362304] [error]
ajp_service::jk_ajp_common.c (2426): (host_1) connecting to tomcat
failed.

[Mon Feb 02 13:45:18 2009] host_1 127.0.0.1 "POST
/hv/main/nav/processflightqry HTTP/1.1" 34.101650

 

Regards,

 

Hubert de Heer




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