Hi
Two machines bml0065 and bml0066. Both have OSX 10.6.6, Tomcat 7.0.10, mod_jk
1.2.31, and httpd2.2.17. bml0065 is the reverse proxy.
I am following this test plan with the
examples/servlets/servlet/SessionExample as the webapp.
<nyissz>
Scenario - tc65, tc66 are running in a cluster.
1 Remove tc66 from a cluster while people are using the application.
- Shut down tc66 by logging into the machine as administrator and
issue the sudo /usr/local/tomcat/bin/shutdown.sh commad.
- sudo cp /usr/local/tomcat/conf/no-cluster.xml
/usr/local/conf/server.xml.
- Start up tc66 by issuing: sudo /usr/local/tomcat/bin/startup.sh
2. Access it directly with
http://bml0066.yalepathorg/examples/servlets/servlet/SessionExample. Access
management console and stop/remove the application. Deploy a new version of the
application.
3. Ask users to use an alternative link to that App.
- http://host/app
4. Let it run for some time.
5. Add this new application to the cluster in such a way that the new
application is now deployed
- Shut down tc66: sudo /usr/local/tomcat/bin/shutdown.sh
- sudo cp /usr/local/tomcat/conf/cluster.xml
/usr/local/conf/server.xml.
- Start up tomcat by issuing: sudo
/usr/local/tomcat/bin/startup.sh
6. Take other tomcat tc65 out of the cluster.
- Shut down tc65 by logging into the machine as administrator and
issue the sudo /usr/local/tomcat/bin/shutdown.sh commad.
- copy the /usr/local/tomcat/conf/no-cluster.xml to
/usr/local/conf/server.xml.
- Start up tomcat by issuing: sudo
/usr/local/tomcat/bin/startup.sh
7. Deploy the new app on it while users seamlessly switch to tc66
8. Add tc65 back to the cluster.
- Shut down tomcat: sudo /usr/local/tomcat/bin/shutdown.sh
- sudo cp /usr/local/tomcat/conf/cluster.xml
/usr/local/conf/server.xml.
- Start up tomcat by issuing: sudo
/usr/local/tomcat/bin/startup.sh
9. Now all apps are in sync on both tomcat instance.
<nyassz>
It works fine untill step 6. When I bring back tc65 as a standalone tomcat
with no jvmRoute in its engine block and the Cluster tag is commented out, then
when I try to access it via the URL:
http://bml0065.yalepath.org/examples/servlets/servlet/SessionExample
it hijacks the clustered session. Here is what is on the screen after adding
two new session attribute with its value:
<nyissz>
Sessions Example
Session ID: 480C796251BF44355C44FDB0EF4B5AFD.tc66
Created: Fri Apr 15 12:20:40 EDT 2011
Last Accessed: Fri Apr 15 12:44:04 EDT 2011
The following data is in your session:
s4 = tc65 up tc66 still standalone
s2 = still standalone
s9 = tc65 standalone tc66 up
s8 = tc65 down, tc66 up
s1 = standalone
s7 = tc65 down, tc66 up
s5 = tc65 up tc66 down
s6 = both are up
s3 = tc65 up tc66 no cluster
<nyassz>
It should have come up without the .tc66 affix and with a different sessionid
and should have just he
s2 = still standalone
s1 = standalone
attribute names and values. I did not have this issue when tc66 was in its
standalone mode.
Compared it with the real clustered session accessed via the URL:
http://bml0065.yalepath.org/tc/examples/servlets/servlet/SessionExample
<nyissz>
Session ID: 480C796251BF44355C44FDB0EF4B5AFD.tc66
Created: Fri Apr 15 12:20:40 EDT 2011
Last Accessed: Fri Apr 15 12:42:30 EDT 2011
The following data is in your session:
s4 = tc65 up tc66 still standalone
s2 = tc65 up tc66 down
s9 = tc65 standalone tc66 up
s8 = tc65 down, tc66 up
s1 = standalone
s7 = tc65 down, tc66 up
s5 = tc65 up tc66 down
s6 = both are up
s3 = tc65 up tc66 no cluster
<nyassz>
Here is the reverse proxy config:
ProxyRequests Off
<Proxy balancer://pathCluster>
BalancerMember http://bml0065.yalepath.org loadfactor=10
BalancerMember http://bml0066.yalepath.org loadfactor=10
ProxySet lbmethod=bytraffic
</Proxy>
ProxyPass /tc/ balancer://pathCluster/
ProxyPassReverse /tc/ balancer://pathCluster/
ProxyPassReverseCookiePAth / /
ProxyPassReverseCookieDomain / /
Thanks ahead,
János
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