Please see the linked jira for some details. Test is here: https://github.com/infinispan/infinispan/blob/master/server/integration/testsuite/src/test/java/org/infinispan/server/test/clusteredcache/ClusteredCacheConfigurationTest.java#L120 On my local machine I also see warnings like: 16:54:05,143 WARN [org.jgroups.protocols.UDP] (INT-2,shared=udp) JGRP000010: packet from 192.168.0.106:45688 has different version (3.5.0) than ours (3.4.3); packet is discarded 16:54:06,226 WARN [org.jgroups.protocols.UDP] (INT-2,shared=udp) JGRP000010: packet from 192.168.0.106:45688 has different version (3.4.3) than ours (3.5.0); packet is discarded and then the test fails at line 135. In CI fails on 129: https://jenkins.mw.lab.eng.bos.redhat.com/hudson/view/JDG/view/FUNC/job/jdg-remote-rhel/5/jdk=java16_default,label=RHEL5_x86_64/testReport/org.infinispan.server.test.clusteredcache/ClusteredCacheConfigurationTest/testQueueSizeHotrod/ The cluster is probably not forming.
Removing from 6.3.1, since there is no fix right now
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