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From Rainer Jung <rainer.j...@kippdata.de>
Subject Re: JK ISAPI redirector delay
Date Mon, 04 Aug 2008 15:13:02 GMT
Peter Gallagher wrote:
>> If you can reproduce easily and it is not a heavy traffic application.
>> Increase log level to debug until it happens again and make the log
>> available plus the information, between which timestamps you think there
>> is such a delay.
> 
> 
> Below is an excerpt from the ISAPI redirector log. The last 3 lines before the pause
are:
> 
> [Mon Aug 04 14:50:19.243 2008] [4144:2384] [debug] jk_isapi_plugin.c (1518): service()
returned OK
> [Mon Aug 04 14:50:19.243 2008] [4144:2384] [debug] jk_ajp_common.c (691): (tomcat2) resetting
endpoint with sd = 1196
> [Mon Aug 04 14:50:19.243 2008] [4144:2384] [debug] jk_ajp_common.c (2522): recycling
connection pool slot=0 for worker tomcat2
> 
> 
> 
> 15 minutes later, the ISAPI redirector continues with the following:
> 
> [Mon Aug 04 15:05:36.761 2008] [4144:5420] [debug] jk_isapi_plugin.c (1199): Filter started
> [Mon Aug 04 15:05:36.761 2008] [4144:5420] [debug] jk_uri_worker_map.c (786): File C:\Inetpub\tomcat_iis_connector\conf\uriworkermap.properties
 is not modified
> [Mon Aug 04 15:05:36.761 2008] [4144:5420] [debug] jk_uri_worker_map.c (682): Attempting
to map URI '/localhost/lagan/richclientconfig/locale.properties' from 1 maps

 From the point of view of the plugin, during that 15 minute pause there 
was no work to do. The previous request handling was completed, and no 
further request was to be handled until the 15 minutes passed.

So I would say there is some reason the client thinks it shouldn't talk 
to this server for 15 minutes. The client in this case is a Java 
program. You should talk to the client developer, if he is doing 
something special in his communication handling (in this case we 
returned a 404 page of length 1030 Bytes).

It seems there is not much we can do on the web server side here. If 
you've got valid evidence, that indeed the client tries to talk to the 
server during the 15 minutes (e.g. by sniffing traffic with 
tcpdump/snoop/wireshark), let us know.

Regards,

Rainer



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