Ok ... I feel like a moron but I cannot figure out how to use
"disablereuse" option. When I google for examples on "disablereuse", what I
find is that in my httpd.conf file I need to add the line "JkOptions
+DisableReuse". However, reading the information here
(http://httpd.apache.org/docs/2.2/mod/mod_proxy.html) it looks like I need to
add "disablereuse=On" to the end of the line "BalancerMember
http://192.168.1.101:8080 loadfactor=1". I am extremely new at this Tomcat
clustering process, so any leniency and help will be very much appreciated.
Thanks
Have a great day.
________________________________________
From: Filip Hanik - Dev Lists [devli...@hanik.com]
Sent: Tuesday, March 10, 2009 1:22 PM
To: Tomcat Users List
Subject: Re: Need Hellp With Tomcat 6 / Apache 2.2 Cluster Problem
Alston, Brian (US SSA) wrote:
> Filip
>
> Thank you for your help. I made the changes like you suggested:
>
> changed "stickysession-jsessionid" to
> "stickysession=JSESSIONID|jsessionid"
> I already had "stickysession=jsessionid" (it was a typo here in my
> post) but I added the "pipe" and uppercase "JSESSIONID"
>
> my "server.xml" already had the line you suggested.
>
> If I use "disablereuse=On" won't I then have problems with my cookies
> and sessions?
>
disable reuse will not affect your cookies or sessions
Filip
> Again, thank you very much for your help.
>
> ________________________________________
> From: Filip Hanik - Dev Lists [devli...@hanik.com]
> Sent: Tuesday, March 10, 2009 12:42 PM
> To: Tomcat Users List
> Subject: Re: Need Hellp With Tomcat 6 / Apache 2.2 Cluster Problem
>
> hi Brian,
> your stickysession attribute is wrong, it should look like
>
> |stickysession=JSESSIONID|jsessionid
>
> then you must set jvmRoute in server.xml (<Engine name="xxx"
> jvmRoute="tc1") the jvmRoute has to be unique across the tc nodes.
> stickyness will only apply to request that have sessions
>
> remove smax/max, better to use the defaults
>
> I would also set the property disablereuse to On if it is supported in
> your httpd version, right now it may try to use a connection that is
> dead, and it seems its not trying another node, there may be some other
> attributes that can help with that too
>
> documentation is here
> http://httpd.apache.org/docs/2.2/mod/mod_proxy.html
>
> Filip
>
> |Alston, Brian (US SSA) wrote:
>
>> Like the example in the book, I created a file called
>> "proxy-balancer.conf" and put it in the "conf.d" directory. Here is what the
>> file looks like (I retyped it so there may be mistakes):
>>
>> <IfModule !proxy_module>
>> LoadModule proxy_module modules/mod_proxy.so
>> </IfModule>
>>
>> # <IfModule !proxy_ajp_module>
>> # LoadModule proxy_ajp_module modules/mod_proxy_ajp.so
>> # </IfModule>
>>
>> <IfModule !proxy_http_module>
>> LoadModule proxy_http_module modules/mod_proxy_http.so
>> </IfModule>
>>
>> <IfModule !proxy_balancer_module>
>> LoadModule proxy_balancer_module modules/mod_proxy_balancer.so
>> </IfModule>
>>
>> <IfModule !status_module>
>> LoadModule status_module modules/mod_status.so
>> </IfModule>
>>
>> <IfModule !proxy_balancer_module>
>> ProxyRequests Off
>>
>> <Proxy balancer://tccluster>
>> BalancerMember http://192.168.1.101:8080 loadfactor=1 max=150 smax=145
>> BalancerMember http://192.168.1.102:8080 loadfactor=1 max=150 smax=145
>> BalancerMember http://192.168.1.103:8080 loadfactor=1 max=150 smax=145
>> Order Deny,Allow
>> Allow from all
>> </Proxy>
>>
>> <Location /balancer-manager>
>> SetHandler balancer-manager
>> Order Deny,Allow
>> Allow from all
>> </Location>
>>
>> <Location /my-webapp>
>> ProxyPass balancer://tccluster/my-webapp stickysession-jsessionid
>> ProxyPassReverse balancer://tccluster/my-webapp
>> Order Deny,Allow
>> Allow from all
>> </Location>
>>
>> <Location /examples>
>> ProxyPass balancer://tccluster/examples stickysession-jsessionid
>> ProxyPassReverse balancer://tccluster/examples
>> Order Deny,Allow
>> Allow from all
>> </Location>
>>
>> </IfModule>
>>
>> ________________________________________
>> From: Filip Hanik - Dev Lists [devli...@hanik.com]
>> Sent: Tuesday, March 10, 2009 11:29 AM
>> To: Tomcat Users List
>> Subject: Re: Need Hellp With Tomcat 6 / Apache 2.2 Cluster Problem
>>
>> what does the cluster section of your httpd look like?
>>
>> Alston, Brian (US SSA) wrote:
>>
>>
>>> I have one Apache http server version 2.2.3 (on Red Hat Enterprise Linux
>>> 5) and three Tomcat 6 version 6.0.18 servers (on Windows Server 2003)
>>> running in my cluster. Everything "appears" to be working well. It looks
>>> like it is using RoundRobin because every time I refresh the page it goes
>>> from web001 -> web002 -> web003 -> web001 -> etc. I used some of the
>>> examples that are provided with Tomcat in the "examples" directory -
>>> specifically the "Sessions" servlet and it looks like my sessions are
>>> staying the same and holding information. My issue is this. When I stop one
>>> of the Tomcat servers (let's say web002), I will sometimes get the
>>> following error message when I refresh the page:
>>>
>>> - - - - - - - - - -
>>>
>>> Proxy Error
>>>
>>> The proxy server received an invalid response from an upstream server.
>>> The proxy server could not handle the request GET /examples/instance.html.
>>>
>>> Reason: Error reading from remote server
>>>
>>> Apache/2.2.3 (Red Hat) Server at 150.37.0.20 Port 80
>>>
>>> - - - - - - - - - -
>>>
>>> I don't receive this error message every single time I refresh the page but
>>> I do get it often. It looks like Apache http server is still trying to
>>> access the Tomcat server web002 even though it is down. Does this sound
>>> like I have an incorrect configuration to anybody or is this normal? I
>>> would not think that it was normal, as clustering is supposed to prevent
>>> errors like this.
>>>
>>> I have been following the examples in the O'Reilly book "Tomcat: The
>>> Definitive Guide" in chapter 10 - "Tomcat Clustering".
>>>
>>> Any help anybody can provide will be greatly appreciated.
>>>
>>> Thank you for reading, have a good day.
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>>>
>>>
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>>
>>
>
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