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From Scott Danforth <sdanfo...@epathlearning.com>
Subject Re: mod_jk sticky session still not working
Date Fri, 23 Feb 2007 15:04:09 GMT
P.S. I see a mention of "cluster" in the documentation for jvmRoute. Do 
I need to configure a "cluster" perhaps?

    -- Scott.


Scott Danforth wrote:

> Mladen Turk wrote:
>
>> Scott Danforth wrote:
>>
>>> I'm trying to use jk1.2.20 mod_jk with Apache 1.3 for load balancing 
>>> two tomcat services and sticky sessions aren't working.
>>
>>
>>
>> You don't have session affinity mark
>> For each instance add jvmRoute="tomcat1" or
>> jvmRoute="tomcat2 for a second instance. See:
>> http://tomcat.apache.org/tomcat-5.5-doc/config/engine.html
>
>
>
> Thanks for your help. That sounds very reasonable, and I modifed the 
> two server.xml Engine elements as suggested, but it appears to make no 
> difference.
>
> Below are 3 segments from mod_jk.log.
>
> The first segment shows the initial request coming in without a 
> sessionid. The request is routed to tomcat1 with route=tomcat1.
>
> The second segment shows the response coming back from tomcat1, with a 
> new session id.
>
> The third segment shows the second request coming in with the expected 
> session id, and shows tomcat2 being selected with route=tomcat2.
>
> You say I don't have session affinity mark. How would that show up in 
> the log? Is the "partial sessionid" an indication of the problem?
>
>    -- Scott.
>
>
> [Fri Feb 23 09:08:53 2007] [6000:0000] [debug] 
> map_uri_to_worker::jk_uri_worker_map.c (575): Attempting to map URI 
> '/servlets/Build' from 1 maps
> [Fri Feb 23 09:34:59 2007] [6266:0000] [debug] 
> map_uri_to_worker::jk_uri_worker_map.c (587): Attempting to map 
> context URI '/servlets/*=loadbalancer' source 'JkMount'
> [Fri Feb 23 09:34:59 2007] [6266:0000] [debug] 
> map_uri_to_worker::jk_uri_worker_map.c (602): Found a wildchar match 
> '/servlets/*=loadbalancer'
> [Fri Feb 23 09:34:59 2007] [6266:0000] [debug] 
> wc_get_worker_for_name::jk_worker.c (114): found a worker loadbalancer
> [Fri Feb 23 09:34:59 2007] [6266:0000] [debug] 
> wc_maintain::jk_worker.c (321): Maintaining worker loadbalancer
> [Fri Feb 23 09:34:59 2007] [6266:0000] [debug] 
> wc_get_name_for_type::jk_worker.c (290): Found worker type 'lb'
> [Fri Feb 23 09:34:59 2007] [6266:0000] [debug] 
> init_ws_service::mod_jk.c (561): Service protocol=HTTP/1.1 method=GET 
> host=(null) addr=192.168.1.50 name=build port=8008 auth=(null) 
> user=(null) laddr=192.168.1.7 raddr=192.168.1.50
> [Fri Feb 23 09:34:59 2007] [6266:0000] [debug] service::jk_lb_worker.c 
> (840): service sticky_session=1 id='empty'
> [Fri Feb 23 09:34:59 2007] [6266:0000] [debug] 
> get_most_suitable_worker::jk_lb_worker.c (785): found best worker 
> tomcat1 (tomcat1) using method 'Request'
> [Fri Feb 23 09:34:59 2007] [6266:0000] [debug] service::jk_lb_worker.c 
> (860): service worker=tomcat1 route=tomcat1
>
> ...
>
> [Fri Feb 23 09:35:00 2007] [6266:0000] [debug] 
> ajp_unmarshal_response::jk_ajp_common.c (603): status = 200
> [Fri Feb 23 09:35:00 2007] [6266:0000] [debug] 
> ajp_unmarshal_response::jk_ajp_common.c (610): Number of headers is = 2
> [Fri Feb 23 09:35:00 2007] [6266:0000] [debug] 
> ajp_unmarshal_response::jk_ajp_common.c (666): Header[0] [Set-Cookie] 
> = [JSESSIONID=9E36E3DC58A09ED9045B25F839E37A2C; Path=/]
> [Fri Feb 23 09:35:00 2007] [6266:0000] [debug] 
> ajp_unmarshal_response::jk_ajp_common.c (666): Header[1] 
> [Content-Type] = [text/html;charset=ISO-8859-1]
> [Fri Feb 23 09:35:00 2007] [6266:0000] [debug] 
> ajp_connection_tcp_get_message::jk_ajp_common.c (1029): received from 
> ajp13 pos=0 len=2309 max=8192
>
> ...
>
> [Fri Feb 23 09:35:10 2007] [6266:0000] [debug] 
> map_uri_to_worker::jk_uri_worker_map.c (575): Attempting to map URI 
> '/servlets/Build' from 1 maps
> [Fri Feb 23 09:35:10 2007] [6266:0000] [debug] 
> map_uri_to_worker::jk_uri_worker_map.c (587): Attempting to map 
> context URI '/servlets/*=loadbalancer' source 'JkMount'
> [Fri Feb 23 09:35:10 2007] [6266:0000] [debug] 
> map_uri_to_worker::jk_uri_worker_map.c (602): Found a wildchar match 
> '/servlets/*=loadbalancer'
> [Fri Feb 23 09:35:10 2007] [6266:0000] [debug] 
> wc_get_worker_for_name::jk_worker.c (114): found a worker loadbalancer
> [Fri Feb 23 09:35:10 2007] [6266:0000] [debug] 
> wc_get_name_for_type::jk_worker.c (290): Found worker type 'lb'
> [Fri Feb 23 09:35:10 2007] [6266:0000] [debug] 
> init_ws_service::mod_jk.c (561): Service protocol=HTTP/1.1 method=POST 
> host=(null) addr=192.168.1.50 name=build port=8008 auth=(null) 
> user=(null) laddr=192.168.1.7 raddr=192.168.1.50
> [Fri Feb 23 09:35:10 2007] [6266:0000] [debug] service::jk_lb_worker.c 
> (840): service sticky_session=1 id='9E36E3DC58A09ED9045B25F839E37A2C'
> [Fri Feb 23 09:35:10 2007] [6266:0000] [debug] 
> get_most_suitable_worker::jk_lb_worker.c (733): searching worker for 
> partial sessionid 9E36E3DC58A09ED9045B25F839E37A2C
> [Fri Feb 23 09:35:10 2007] [6266:0000] [debug] 
> get_most_suitable_worker::jk_lb_worker.c (785): found best worker 
> tomcat2 (tomcat2) using method 'Request'
> [Fri Feb 23 09:35:10 2007] [6266:0000] [debug] service::jk_lb_worker.c 
> (860): service worker=tomcat2 route=tomcat2
>
>
>
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>
>

-- 

Scott Danforth, Ph.D.
Director of Technology
ePath Learning, Inc.
70 Howard Street, Suite C
New London, CT 06320
Phone: (860) 444-6989 ext. 3
Fax: (215) 243-7454
email: sdanforth@ePathLearning.com




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