Hang in getThreadId ------------------- Key: JBTM-2808 URL: https://issues.jboss.org/browse/JBTM-2808 Project: JBoss Transaction Manager Issue Type: Bug Reporter: Tom Jenkinson Assignee: Tom Jenkinson Priority: Critical Fix For: 5.4.1.Final at java.util.WeakHashMap.expungeStaleEntries(WeakHashMap.java:341) - locked <0x000000059f929538> (a java.lang.ref.ReferenceQueue) at java.util.WeakHashMap.getTable(WeakHashMap.java:350) at java.util.WeakHashMap.get(WeakHashMap.java:397) at com.arjuna.ats.arjuna.utils.ThreadUtil.getThreadId(ThreadUtil.java:56) No other locking, seems WeakHashMap needs synchronized. https://docs.oracle.com/javase/7/docs/api/java/util/WeakHashMap.html https://issues.jboss.org/browse/JBRULES-541?_sscc=t