The test DuplicateDetectionTest::testNoPersistXA1 passes when libaio is installed on the OS but fails when it is not installed. I observed the failure on mac os x. Then I ran the tests on Linux. it passes when I installed libaio but when I remove the lib it fails with the error: | [main] 11:00:39,077 INFO [org.jboss.messaging.tests.util.UnitTestCase] ###### starting test org.jboss.messaging.tests.integration.DuplicateDetectionTest.testNoPersistXA1 | [main] 11:00:39,413 WARNING [org.jboss.messaging.core.management.impl.ManagementServiceImpl] It has been detected that the cluster admin user and password which are used to replicate management operation from one node to the other have not been changed from the installation default. Please see the JBoss Messaging user guide for instructions on how to do this. | [main] 11:00:39,626 INFO [org.jboss.messaging.core.server.impl.MessagingServerImpl] JBoss Messaging Server version 2.0.0.BETA3 (maggot, 104) started | [main] 11:00:39,629 INFO [org.jboss.messaging.core.server.impl.MessagingServerImpl] JBoss Messaging Server version 2.0.0.BETA3 (maggot, 104) stopped | [main] 11:00:39,637 WARNING [org.jboss.messaging.core.management.impl.ManagementServiceImpl] It has been detected that the cluster admin user and password which are used to replicate management operation from one node to the other have not been changed from the installation default. Please see the JBoss Messaging user guide for instructions on how to do this. | [main] 11:00:39,680 INFO [org.jboss.messaging.core.persistence.impl.journal.JournalStorageManager] AIO journal selected | [main] 11:00:39,687 WARNING [org.jboss.messaging.core.persistence.impl.journal.JournalStorageManager] AIO wasn't located on this platform, it will fall back to using pure Java NIO. If your platform is Linux, install LibAIO to enable the AIO journal | [main] 11:00:39,918 INFO [org.jboss.messaging.core.server.impl.MessagingServerImpl] JBoss Messaging Server version 2.0.0.BETA3 (maggot, 104) started | [Thread-1 (group:JBM-server-threads15310053-3907502)] 11:00:40,127 SEVERE [org.jboss.messaging.core.server.impl.ServerSessionImpl] Failed to xa prepare | java.lang.NullPointerException | at org.jboss.messaging.core.journal.impl.JournalTransaction.syncPreviousFiles(JournalTransaction.java:224) | at org.jboss.messaging.core.journal.impl.JournalImpl.appendPrepareRecord(JournalImpl.java:1171) | at org.jboss.messaging.core.persistence.impl.journal.JournalStorageManager.prepare(JournalStorageManager.java:411) | at org.jboss.messaging.core.transaction.impl.TransactionImpl.prepare(TransactionImpl.java:166) | at org.jboss.messaging.core.server.impl.ServerSessionImpl.doHandleXAPrepare(ServerSessionImpl.java:2160) | at org.jboss.messaging.core.server.impl.ServerSessionImpl.handleXAPrepare(ServerSessionImpl.java:702) | at org.jboss.messaging.core.server.impl.ServerSessionPacketHandler.handlePacket(ServerSessionPacketHandler.java:215) | at org.jboss.messaging.core.remoting.impl.ChannelImpl.handlePacket(ChannelImpl.java:621) | at org.jboss.messaging.core.remoting.impl.RemotingConnectionImpl.bufferReceived(RemotingConnectionImpl.java:399) | at org.jboss.messaging.core.remoting.server.impl.RemotingServiceImpl$DelegatingBufferHandler.bufferReceived(RemotingServiceImpl.java:483) | at org.jboss.messaging.core.remoting.impl.invm.InVMConnection$1.run(InVMConnection.java:136) | at org.jboss.messaging.utils.OrderedExecutorFactory$OrderedExecutor$1.run(OrderedExecutorFactory.java:105) | at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:651) | at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:676) | at java.lang.Thread.run(Thread.java:613) | This is the only test in the class which fails if libaio is not installed. All the other tests pass where the lib is there or not. Does someone see a relation between this test and the libaio installation? View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4241917#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...