Hi , Iam trying to persistence drools workflow using my sql as back end . But iam getting "Could not commit sessions" Iam trying with example code, drool.session.conf file contains drools.workItemHandlers = MyWorkItemHandlers.conf #drools.commandService = org.drools.persistence.session.SingleSessionCommandService #drools.processInstanceManagerFactory = org.drools.persistence.processinstance.JPAProcessInstanceManagerFactory #drools.workItemManagerFactory = org.drools.persistence.processinstance.JPAWorkItemManagerFactory #drools.processSignalManagerFactory = org.drools.persistence.processinstance.JPASignalManagerFactory Folllwoing are my rf file My RF file <?xml version="1.0" encoding="UTF-8"?<process xmlns="http://drools.org/drools-5.0/process" xmlns:xs="http://www.w3.org/2001/XMLSchema-instance" xs:schemaLocation="http://drools.org/drools-5.0/process drools-processes-5.0.xsd" type="RuleFlow" name="droolsflow" id="org.plugtree.labs.droolsflow" package-name="org.plugtree.labs" <header <imports <import name="org.kie.lab.variablepersistence.MyEntity" / <import name="org.kie.lab.variablepersistence.MyVariableSerializable" / </imports <variables <variable name="x" <type name="org.drools.process.core.datatype.impl.type.StringDataType" / </variable <variable name="y" <type name="org.drools.process.core.datatype.impl.type.ObjectDataType" className="org.kie.lab.variablepersistence.MyEntity" / </variable <variable name="z" <type name="org.drools.process.core.datatype.impl.type.ObjectDataType" className="org.kie.lab.variablepersistence.MyVariableSerializable" / </variable <variable name="a" <type name="org.drools.process.core.datatype.impl.type.StringDataType" / </variable <variable name="b" <type name="org.drools.process.core.datatype.impl.type.ObjectDataType" className="org.kie.lab.variablepersistence.MyEntity" / </variable <variable name="c" <type name="org.drools.process.core.datatype.impl.type.ObjectDataType" className="org.kie.lab.variablepersistence.MyVariableSerializable" / </variable </variables </header <nodes <humanTask id="4" name="Human Task" x="208" y="16" width="93" height="48" <work name="Human Task" <parameter name="ActorId" <type name="org.drools.process.core.datatype.impl.type.StringDataType" / </parameter <parameter name="Comment" <type name="org.drools.process.core.datatype.impl.type.StringDataType" / </parameter <parameter name="Content" <type name="org.drools.process.core.datatype.impl.type.StringDataType" / </parameter <parameter name="Priority" <type name="org.drools.process.core.datatype.impl.type.StringDataType" / </parameter <parameter name="Skippable" <type name="org.drools.process.core.datatype.impl.type.StringDataType" / </parameter <parameter name="TaskName" <type name="org.drools.process.core.datatype.impl.type.StringDataType" / </parameter </work </humanTask <humanTask id="9" name="Human Task" x="713" y="16" width="100" height="48" <work name="Human Task" <parameter name="ActorId" <type name="org.drools.process.core.datatype.impl.type.StringDataType" / </parameter <parameter name="Comment" <type name="org.drools.process.core.datatype.impl.type.StringDataType" / </parameter <parameter name="Content" <type name="org.drools.process.core.datatype.impl.type.StringDataType" / </parameter <parameter name="Priority" <type name="org.drools.process.core.datatype.impl.type.StringDataType" / </parameter <parameter name="Skippable" <type name="org.drools.process.core.datatype.impl.type.StringDataType" / </parameter <parameter name="TaskName" <type name="org.drools.process.core.datatype.impl.type.StringDataType" / </parameter </work </humanTask <actionNode id="8" name="Action" x="601" y="20" width="80" height="40" <action type="expression" dialect="java" >System.out.println("x = " + x); System.out.println("y = " + y); System.out.println("z = " + z); System.out.println("a = " + a); System.out.println("b = " + b); System.out.println("c = " + c); kcontext.setVariable("a", "Some changed String"); kcontext.setVariable("b", new MyEntity("This is a changed test Entity")); kcontext.setVariable("c", new MyVariableSerializable("This is a changed test SerializableObject"));</action </actionNode <actionNode id="6" name="Action" x="333" y="20" width="80" height="40" <action type="expression" dialect="java" >System.out.println("x = " + x); System.out.println("y = " + y); System.out.println("z = " + z); kcontext.setVariable("a", "Some new String"); kcontext.setVariable("b", new MyEntity("This is a new test Entity")); kcontext.setVariable("c", new MyVariableSerializable("This is a new test SerializableObject"));</action </actionNode <start id="1" name="Start" x="16" y="16" width="48" height="48" / <end id="3" name="End" x="957" y="16" width="48" height="48" / <actionNode id="10" name="Action" x="845" y="16" width="80" height="48" <action type="expression" dialect="java" >System.out.println("x = " + x); System.out.println("y = " + y); System.out.println("z = " + z); System.out.println("a = " + a); System.out.println("b = " + b); System.out.println("c = " + c);</action </actionNode <humanTask id="7" name="Human Task" x="445" y="20" width="124" height="40" <work name="Human Task" <parameter name="ActorId" <type name="org.drools.process.core.datatype.impl.type.StringDataType" / </parameter <parameter name="Comment" <type name="org.drools.process.core.datatype.impl.type.StringDataType" / </parameter <parameter name="Content" <type name="org.drools.process.core.datatype.impl.type.StringDataType" / </parameter <parameter name="Priority" <type name="org.drools.process.core.datatype.impl.type.StringDataType" / </parameter <parameter name="Skippable" <type name="org.drools.process.core.datatype.impl.type.StringDataType" / </parameter <parameter name="TaskName" <type name="org.drools.process.core.datatype.impl.type.StringDataType" / </parameter </work </humanTask <actionNode id="5" name="Action" x="96" y="20" width="80" height="40" <action type="expression" dialect="java" >System.out.println("x = " + x); System.out.println("y = " + y); System.out.println("z = " + z);</action </actionNode </nodes <connections <connection from="5" to="4" / <connection from="8" to="9" / <connection from="7" to="8" / <connection from="4" to="6" / <connection from="10" to="3" / <connection from="9" to="10" / <connection from="6" to="7" / <connection from="1" to="5" / </connections </processpersistence.xml <?xml version="1.0" encoding="UTF-8"?<persistence version="1.0" xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd" <persistence-unit name="org.drools.persistence.jpa" transaction-type="JTA" <provider>org.hibernate.ejb.HibernatePersistence</provider <jta-data-source>jdbc/testDS1</jta-data-source <class>org.drools.persistence.session.SessionInfo</class <class>org.drools.persistence.processinstance.ProcessInstanceInfo</class <class>org.drools.persistence.processinstance.WorkItemInfo</class <class>org.drools.persistence.processinstance.variabletypes.VariableInstanceInfo</class <class>org.drools.persistence.processinstance.variabletypes.JPAPersistedVariable</class <class>org.drools.persistence.processinstance.variabletypes.SerializablePersistedVariable</class <class>org.kie.lab.variablepersistence.MyEntity</class <class>org.kie.lab.variablepersistence.StringPersistedVariable</class <class>org.kie.lab.variablepersistence.MyVariableSerializable</class <properties <property name="hibernate.dialect" value="org.hibernate.dialect.MySQL5Dialect"/ <property name="hibernate.hbm2ddl.auto" value="create-drop"/ <property name="hibernate.show_sql" value="false"/ <property name="hibernate.connection.autocommit" value="false"/ <property name="hibernate.transaction.manager_lookup_class" value="org.hibernate.transaction.BTMTransactionManagerLookup"/ </properties </persistence-unit</persistence Information in this e-mail is intended solely for the person(s) to whom it is addressed and may contain confidential information. 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