DNS_PING#destroy could yield NPE hiding the root cause ------------------------------------------------------ Key: JGRP-2388 URL: https://issues.jboss.org/browse/JGRP-2388 Project: JGroups Issue Type: Bug Reporter: Radoslav Husar Assignee: Radoslav Husar Priority: Minor Fix For: 4.1.6 Caused by: java.lang.NullPointerException at org.jgroups.protocols.dns.DNS_PING.destroy(DNS_PING.java:70) at java.util.ArrayList.forEach(ArrayList.java:1257) at org.jgroups.stack.ProtocolStack.destroy(ProtocolStack.java:876) at org.jgroups.stack.ProtocolStack.initProtocolStack(ProtocolStack.java:867) at org.jgroups.stack.ProtocolStack.init(ProtocolStack.java:849) at org.jgroups.JChannel.<init>(JChannel.java:155) at org.jboss.as.clustering.jgroups.JChannelFactory.createChannel(JChannelFactory.java:116) at org.jboss.as.clustering.jgroups.subsystem.ChannelServiceConfigurator.get(ChannelServiceConfigurator.java:96)