TCP_NIO2 starts dropping messages --------------------------------- Key: JGRP-1963 URL: https://issues.jboss.org/browse/JGRP-1963 Project: JGroups Issue Type: Bug Affects Versions: 3.6.5 Reporter: Bela Ban Assignee: Bela Ban Priority: Critical Fix For: 3.6.6 At some point, {{TCP_NIO2}} starts dropping messages, at either the send or receive direction (still need to find out). This shows itself when e.g. a JOIN fails: the joiner sends a lot of {{JOIN-REQ}} messages and gets {{JOIN-RSP}} msgs from the coord, but doesn't receive them. If {{GMS.max_join_attempts="0"}}, then this goes on forever, or until the joiner doesn't discover any nodes anymore. {{probe.sh jmx=UNICAST3.printConnections}} shows that messages are sent but no acks are received. Clearing the connection table in {{TCP_NIO2}} fixes the problem: {{probe.sh op=TCP_NIO2.clearConnections}}. This shows that the issue is indeed in {{TCP_NIO2}}. Also, {{TCP}} and {{UDP}} work.