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?
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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