Radim Hatlapatka added a comment - 11/Mar/16 9:30 AM It occurs with IPv4, regarding jgroups I am using default configuration in HA profile (the only thing changed is multicast port to prevent collisions in the lab).

NPE when handling incoming JGroups message ------------------------------------------ Key: JGRP-2027 URL: https://issues.jboss.org/browse/JGRP-2027 Project: JGroups Issue Type: Bug Affects Versions: 3.6.7 Reporter: Radoslav Husar Assignee: Radoslav Husar Fix For: 3.6.10, 4.0 Spotted by QE. Nothing in particular leading to this. {noformat} 05:34:46,660 ERROR [org.jgroups.protocols.UDP] (INT-1,ee,jboss-eap-7.0) JGRP000030: jboss-eap-7.0: failed handling incoming message: java.lang.NullPointerException 05:34:49,846 ERROR [org.jgroups.protocols.UDP] (INT-1,ee,dev212) JGRP000027: failed passing message up: java.lang.NullPointerException at org.jgroups.protocols.TP$SingleMessageHandler.run(TP.java:1801) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang.Thread.run(Thread.java:745) {noformat}