Weblogic 10.3.6 - Load balancing- sending duplicate requests 5 min

Question

Hello,
         We have configured clustering and load balancing to our integration solution as mentioned at http: //abhinavgupta3.blogspot.in/2012/02/osb-clustering-load-balancer.html
But when ever a requests goes through load balancer and if that requests goes beyond 5 min (300Sec), then load balancer generating new request and that request is being redirected to another node.
As per my blogging  I found there is some setting need t
Because of this we are going to ambiguous situation.o configured at load balancer for not falling in to this situation.Its about a property called 'Idempotent'
Please help me on this.
Thanks,
Satyendra

Answer 1

"The datasource is created successfully from the console so there's no problem with the jar file."
Did you also test the data source when you created it?
- when yes then WebLogic can indeed find the derbyclient.jar as the driver org.apache.derby.jdbc.ClientDriver is part of it.
"I specified in the weblogic.xml that the antlr.* classes should be taken from the application. Also tried this option for org.apache.derby.* classes."
Have you only defined a
<prefer-application-packages>
    <package-name>antlr.*</package-name>
    <package-name>org.apache.derby.*</package-name>
</prefer-application-packages>in weblogic.xml or did you also turn on prefer-web-inf-classes?
It is smart to start from scratch and delete all the jar files in all the directories. To make the derbyclient.jar part of the WebLogic classpath you can do the following:
- edit setDomainEnv: When you open setDomainEnv there is an entry like "SET THE CLASSPATH". Just before - if [ "${JAVA_VENDOR}" != "BEA" ] ; then
you can put something like: CLASSPATH=${CLASSPATH}${CLASSPATHSEP}location/derbyclient.jar
If the class must be available on every server in a cluster, you can edit the commEnv file (located in the ${WL_HOME}/common/bin directory)
Search for the entry "set up WebLogic Server's class path". And below the WEBLOGIC_CLASSPATH you can add something like:
WEBLOGIC_CLASSPATH=${WEBLOGIC_CLASSPATH}${CLASSPATHSEP}location/derbyclient.jar
Hope this helps you a little