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I have not been able to get multiple sessions working properly:

• I declare multiple sessions in the spring context (see below).
• I start a pool of threads. As each thread is executed I grab session and save it in a ThreadLocal.
• I despatch calls to kSession.startProcess in each thread.

Is this a reasonable approach?

I find that this will run OK for a while but ultimately will fail either with an NPE in ProcessInstanceImpl getProcess because kruntime is null OR will fail to commit a transaction because it has already been committed.

Regards,

Richard

<drools:ksession id="kSession1" type="stateful" kbase="kBase">

    <drools:configuration>

        <drools:work-item-handlers>

            <!-- Process : ServiceNowCMDB CreateCI -->

            <drools:work-item-handler name="ServiceNowCmdbMapperST" ref="ServiceNowCmdbMapperHandler"/>

            ...etc

        </drools:work-item-handlers>

        <!-- jBPM Persistence -->

        <drools:jpa-persistence>

            <drools:transaction-manager ref="transactionManager" />

            <drools:entity-manager-factory ref="entityManagerFactory" />  

        </drools:jpa-persistence>

    </drools:configuration>

</drools:ksession>

<drools:ksession id="kSession2" type="stateful" kbase="kBase">

    <drools:configuration>

        <drools:work-item-handlers>

            <!-- Process : ServiceNowCMDB CreateCI -->

            <drools:work-item-handler name="ServiceNowCmdbMapperST" ref="ServiceNowCmdbMapperHandler"/>

            ...etc

        </drools:work-item-handlers>

        <!-- jBPM Persistence -->

        <drools:jpa-persistence>

            <drools:transaction-manager ref="transactionManager" />

            <drools:entity-manager-factory ref="entityManagerFactory" />  

        </drools:jpa-persistence>

    </drools:configuration>

</drools:ksession>