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EJB3 is slow sometimes
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created by <a href="https://community.jboss.org/people/kalaiselvamp">Kalaiselvam P</a> in <i>EJB3</i> - <a href="https://community.jboss.org/message/799317#799317">View the full discussion</a>
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<div class="jive-rendered-content"><p>Hi,</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>We have EJB(EJB3.0) application which is deployed on JBoss 5.0, we feel sometimes EJB takes long time to return the data(data volume is always same) to invoker. </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>@Stateless(name = "RequiresNewSessionBean")</p><p>@RemoteBinding (jndiBinding = "N_All/RequiresNewSessionBean/remote")</p><p>@LocalBinding (jndiBinding = "N_All/RequiresNewSessionBean/local")</p><p>@TransactionManagement(TransactionManagementType.CONTAINER)</p><p>@TransactionAttribute(TransactionAttributeType.REQUIRES_NEW)</p><p><strong>com.test.ejb.RequiresNewSessionBean </strong></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><strong>com.test.ejb.LocalSessionBeanInvoker</strong> (this class has only invoking parts) will invoke "<strong>com.test.ejb.RequiresNewSessionBean</strong>"</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>As you see the below 3 scenarios,  execution of "<strong>com.test.ejb.RequiresNewSessionBean</strong>" has been finished but it takes time to return to invoker.</p><p>The time taken is changing from "<strong>8 ms</strong>" to maximum "<strong>150 ms</strong>" in my local system.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>But in our production server this time taken is went up to "<strong>3000 ms"</strong> (only sometimes not all the times, by default it will be within 1 ~ 2 ms in Production server)</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Please share your suggestions to overcome this issue.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Scenario 1</p><p>----------</p><p>17:02:15,052 DEBUG [LocalSessionBeanInvoker]  20130225-080213979 0001  com.test.ejb.LocalSessionBeanInvoker has started.20130225080215052</p><p>17:02:15,054 DEBUG [RequiresNewSessionBean]  20130225-080213979 0001  com.test.ejb.RequiresNewSessionBean has started.20130225080215053</p><p>17:02:15,094 DEBUG [RequiresNewSessionBean]  20130225-080213979 0001  com.test.ejb.RequiresNewSessionBean has finished.20130225080215093</p><p>17:02:15,094 DEBUG [RequiresNewSessionBean]  20130225-080213979 0001 <strong> [com.test.ejb.RequiresNewSessionBean]Elapsed time is 41 ms.</strong></p><p>17:02:15,101 DEBUG [LocalSessionBeanInvoker]  20130225-080213979 0001  com.test.ejb.LocalSessionBeanInvoker has finished.20130225080215101</p><p>17:02:15,101 DEBUG [LocalSessionBeanInvoker]  20130225-080213979 0001 <strong> [com.test.ejb.LocalSessionBeanInvoker]Elapsed time is 49 ms.</strong></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Scenario 2</p><p>----------</p><p>17:11:35,343 DEBUG [LocalSessionBeanInvoker]  20130225-081135291 0001  com.test.ejb.LocalSessionBeanInvoker has started.20130225081135343</p><p>17:11:35,344 DEBUG [RequiresNewSessionBean]  20130225-081135291 0001  com.test.ejb.RequiresNewSessionBean has started.20130225081135344</p><p>17:11:35,402 DEBUG [RequiresNewSessionBean]  20130225-081135291 0001  com.test.ejb.RequiresNewSessionBean has finished.20130225081135402</p><p>17:11:35,402 DEBUG [RequiresNewSessionBean]  20130225-081135291 0001 <strong> [com.test.ejb.RequiresNewSessionBean]Elapsed time is 53 ms.</strong></p><p>17:11:35,417 DEBUG [LocalSessionBeanInvoker]  20130225-081135291 0001  com.test.ejb.LocalSessionBeanInvoker has finished.20130225081135417</p><p>17:11:35,417 DEBUG [LocalSessionBeanInvoker]  20130225-081135291 0001  <strong>[com.test.ejb.LocalSessionBeanInvoker]Elapsed time is 71 ms.</strong></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Scenario 3</p><p>----------</p><p>17:32:25,705 DEBUG [LocalSessionBeanInvoker]  20130225-083225641 0001  com.test.ejb.LocalSessionBeanInvoker has started.20130225083225705</p><p>17:32:25,708 DEBUG [RequiresNewSessionBean]  20130225-083225641 0001  com.test.ejb.RequiresNewSessionBean has started.20130225083225708</p><p>17:32:25,775 DEBUG [RequiresNewSessionBean]  20130225-083225641 0001  com.test.ejb.RequiresNewSessionBean has finished.20130225083225775</p><p>17:32:25,775 DEBUG [RequiresNewSessionBean]  20130225-083225641 0001 <strong> [com.test.ejb.RequiresNewSessionBean]Elapsed time is 67 ms.</strong></p><p>17:32:25,789 DEBUG [LocalSessionBeanInvoker]  20130225-083225641 0001  com.test.ejb.LocalSessionBeanInvoker has finished.20130225083225789</p><p>17:32:25,789 DEBUG [LocalSessionBeanInvoker]  20130225-083225641 0001  <strong>[com.test.ejb.LocalSessionBeanInvoker]Elapsed time is 84 ms.</strong></p></div>
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