What steps will reproduce the problem?
1. Unknown, randomnly happens
2.
3.

– Error Details –
Date: Thu May 24 13:35:41 PDT 2012
Message: Could not publish to the server.
Severity: Error
Product: Eclipse 1.4.2.20120131-1457 (org.eclipse.epp.package.jee.product)
Plugin: org.eclipse.wst.server.core
Session Data:
eclipse.buildId=M20120208-0800
java.version=1.7.0_04
java.vendor=Oracle Corporation
BootLoader constants: OS=win32, ARCH=x86_64, WS=win32, NL=en_CA
Framework arguments: -product org.eclipse.epp.package.jee.product
Command-line arguments: -os win32 -ws win32 -arch x86_64 -product org.eclipse.epp.package.jee.product -data e:\java\workspace

Exception Stack Trace:
java.lang.NullPointerException
at org.jboss.ide.eclipse.as.core.server.internal.ExtendedServerPropertiesAdapterFactory.getExtendedProperties(ExtendedServerPropertiesAdapterFactory.java:53)
at org.jboss.ide.eclipse.as.core.server.internal.ExtendedServerPropertiesAdapterFactory.getAdapter(ExtendedServerPropertiesAdapterFactory.java:42)
at org.jboss.ide.eclipse.as.core.server.internal.ExtendedServerPropertiesAdapterFactory.getJBossExtendedProperties(ExtendedServerPropertiesAdapterFactory.java:32)
at org.jboss.ide.eclipse.as.jmx.integration.JBoss3To6ConnectionProvider.belongsHere(JBoss3To6ConnectionProvider.java:37)
at org.jboss.ide.eclipse.as.jmx.integration.AbstractJBossJMXConnectionProvider.getConnections(AbstractJBossJMXConnectionProvider.java:106)
at org.jboss.ide.eclipse.as.jmx.integration.AbstractJBossJMXConnectionProvider.findConnection(AbstractJBossJMXConnectionProvider.java:94)
at org.jboss.ide.eclipse.as.jmx.integration.JBossJMXConnectionProviderModel.getConnection(JBossJMXConnectionProviderModel.java:59)
at org.jboss.ide.eclipse.as.jmx.integration.JBossJMXConnectionProviderModel.run(JBossJMXConnectionProviderModel.java:76)
at org.jboss.ide.eclipse.as.jmx.integration.JBossServerJMXRunner.run(JBossServerJMXRunner.java:33)
at org.jboss.ide.eclipse.as.core.server.internal.LocalJBossBehaviorDelegate.publishStart(LocalJBossBehaviorDelegate.java:211)
at org.jboss.ide.eclipse.as.core.server.internal.DelegatingServerBehavior.publishStart(DelegatingServerBehavior.java:139)
at org.eclipse.wst.server.core.model.ServerBehaviourDelegate.publish(ServerBehaviourDelegate.java:927)
at org.eclipse.wst.server.core.model.ServerBehaviourDelegate.publish(ServerBehaviourDelegate.java:774)
at org.eclipse.wst.server.core.internal.Server.publishImpl(Server.java:3087)
at org.eclipse.wst.server.core.internal.Server$PublishJob.run(Server.java:345)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)