[jboss-jira] [JBoss JIRA] Closed: (JBREM-66) Race condition on startup

Race condition on startup ------------------------- Key: JBREM-66 URL: http://jira.jboss.com/jira/browse/JBREM-66 Project: JBoss Remoting Issue Type: Bug Affects Versions: 1.0.1 final Environment: linux, jobss 4.0.1, jdk 1.5_01 Reporter: james ahlborn Assigned To: Tom Elrod Priority: Minor Fix For: 1.0.2 final Original Estimate: 1 day Remaining Estimate: 1 day I occassionally get this exception trace on jboss startup: 2005-02-25 13:51:26,981 ERROR [org.jboss.remoting.detection.multicast.MulticastD etector] Error during detection of: Detection [identity:JBOSS Identity [address: itsy.hmsonline.com/10.67.89.58,instanceid:9d49962ca1854d0cx21bc15d1x10141... -7fff718,JMX id:itsy.hmsonline.com_1109263894685,domain:JBOSS],locators:2] javax.management.RuntimeOperationsException at org.jboss.mx.server.registry.BasicMBeanRegistry.get(BasicMBeanRegistry.java :495) at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:636) at org.jboss.remoting.detection.AbstractDetector.detect(AbstractDetector.java: 327) at org.jboss.remoting.detection.multicast.MulticastDetector.listen(MulticastDe tector.java:212) at org.jboss.remoting.detection.multicast.MulticastDetector.access$100(Multica stDetector.java:32) at org.jboss.remoting.detection.multicast.MulticastDetector$Listener.run(Multi castDetector.java:240) Caused by: java.lang.IllegalArgumentException: null object name ... 6 more I traced it through the 4.0.1 source code, and it seems that the "null" pointer is the member variable registryObjectName in AbstractDetector.java. this variable only is set during the start() method of this class, and if the value is "null", a warning is logged. i don't see this warning, so i am assuming this variable is set to a non-null value during the start() method. this implies that this member variable is sometimes being accessed before the start() method completes. This is probably because the MulticaseDetector$Listener class is running on a separate thread. it should probably block until the outer class is done starting.