Thanks for the link. Seems like the reaperTimeout is the sleep time for the reaper itself. com.arjuna.ats.arjuna.coordinator.defaultTimeout seems to be the maximum time a transaction can take before getting rolled back by the reaper. I tried setting the defaultTimeout but didn't see like it worked. In the deploy folder there is a file called transaction-jboss-beans.xml in this file I have set transactionTimeout that did the trick. | <bean name="TransactionManager" class="com.arjuna.ats.jbossatx.jta.TransactionManagerService"> | <annotation>@org.jboss.aop.microcontainer.aspects.jmx.JMX(name="jboss:service=TransactionManager", exposedInterface=com.arjuna.ats.jbossatx.jta.TransactionManagerServiceMBean.class, registerDirectly=true)</annotation> | | <property name="transactionTimeout">1800</property> | <property name="objectStoreDir">${jboss.server.data.dir}/tx-object-store</property> | <property name="mbeanServer"><inject bean="JMXKernel" property="mbeanServer"/></property> | View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4225762#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...