[teiid-issues] [JBoss JIRA] Resolved: (TEIID-733) ConcurrentModificationException in SessionMonitor

ConcurrentModificationException in SessionMonitor ------------------------------------------------- Key: TEIID-733 URL: https://jira.jboss.org/jira/browse/TEIID-733 Project: Teiid Issue Type: Bug Components: Embedded, Query Engine Affects Versions: 6.1.0 Reporter: Ted Jones Assignee: Steven Hawkins Fix For: 6.2.0 While running a Seam CRUD Web App against Teiid, I am seeing the following intermittent error: 14:00:51,806 ERROR [STDERR] Exception in thread "SessionMonitor" 14:00:51,814 ERROR [STDERR] java.util.ConcurrentModificationException 14:00:51,815 ERROR [STDERR] at java.util.HashMap$HashIterator.nextEntry(HashMap.java:793) 14:00:51,815 ERROR [STDERR] at java.util.HashMap$ValueIterator.next(HashMap.java:822) 14:00:51,815 ERROR [STDERR] at com.metamatrix.platform.security.session.service.SessionServiceImpl.monitorSessions(SessionServiceImpl.java:97) 14:00:51,815 ERROR [STDERR] at com.metamatrix.platform.security.session.service.SessionServiceImpl.access$000(SessionServiceImpl.java:71) 14:00:51,815 ERROR [STDERR] at com.metamatrix.platform.security.session.service.SessionServiceImpl$1.run(SessionServiceImpl.java:340) 14:00:51,815 ERROR [STDERR] at java.util.TimerThread.mainLoop(Timer.java:512) 14:00:51,815 ERROR [STDERR] at java.util.TimerThread.run(Timer.java:462) 14:02:55,126 ERROR [STDERR] Exception in thread "Worker10" 14:02:55,135 ERROR [STDERR] java.lang.NullPointerException 14:02:55,135 ERROR [STDERR] at com.metamatrix.cache.jboss.JBossCache.getChild(JBossCache.java:145) 14:02:55,135 ERROR [STDERR] at org.teiid.dqp.internal.cache.DQPContextCache.removeRequestScopedCache(DQPContextCache.java:60) 14:02:55,135 ERROR [STDERR] at org.teiid.dqp.internal.process.DQPCore.removeRequest(DQPCore.java:304) 14:02:55,135 ERROR [STDERR] at org.teiid.dqp.internal.process.RequestWorkItem.attemptClose(RequestWorkItem.java:357) 14:02:55,135 ERROR [STDERR] at org.teiid.dqp.internal.process.RequestWorkItem.process(RequestWorkItem.java:247) 14:02:55,135 ERROR [STDERR] at org.teiid.dqp.internal.process.AbstractWorkItem.run(AbstractWorkItem.java:44) 14:02:55,135 ERROR [STDERR] at com.metamatrix.common.queue.WorkerPoolFactory$StatsCapturingSharedThreadPoolExecutor$1.run(WorkerPoolFactory.java:211) 14:02:55,135 ERROR [STDERR] at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) 14:02:55,135 ERROR [STDERR] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) 14:02:55,135 ERROR [STDERR] at java.lang.Thread.run(Thread.java:619)