Hi all, I'm building master [1] and see such NPEs dumped on my terminal quite often; I guess you all noticed already? I couldn't find a JIRA.. 16:24:03,083 FATAL (transport-thread-StateTransferLinkFailuresTest[null, tx=false]-NodeN-p63985-t2) [PersistentUUIDManagerImpl] Cannot find mapping for address StateTransferLinkFailuresTest[null, tx=false]-NodeN-32100 java.lang.NullPointerException at org.infinispan.topology.PersistentUUIDManagerImpl.mapAddresses(PersistentUUIDManagerImpl.java:70) at org.infinispan.partitionhandling.impl.PreferAvailabilityStrategy.onPartitionMerge(PreferAvailabilityStrategy.java:214) at org.infinispan.topology.ClusterCacheStatus.doMergePartitions(ClusterCacheStatus.java:597) at org.infinispan.topology.ClusterTopologyManagerImpl.lambda$recoverClusterStatus$6(ClusterTopologyManagerImpl.java:519) at org.infinispan.executors.LimitedExecutor.runTasks(LimitedExecutor.java:144) at org.infinispan.executors.LimitedExecutor.access$100(LimitedExecutor.java:33) at org.infinispan.executors.LimitedExecutor$Runner.run(LimitedExecutor.java:174) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) 16:24:03,115 FATAL (transport-thread-StateTransferLinkFailuresTest[null, tx=false]-NodeQ-p64193-t5) [PersistentUUIDManagerImpl] Cannot find mapping for address StateTransferLinkFailuresTest[null, tx=false]-NodeQ-10499 java.lang.NullPointerException at org.infinispan.topology.PersistentUUIDManagerImpl.mapAddresses(PersistentUUIDManagerImpl.java:70) at org.infinispan.partitionhandling.impl.PreferAvailabilityStrategy.onPartitionMerge(PreferAvailabilityStrategy.java:214) at org.infinispan.topology.ClusterCacheStatus.doMergePartitions(ClusterCacheStatus.java:597) at org.infinispan.topology.ClusterTopologyManagerImpl.lambda$recoverClusterStatus$6(ClusterTopologyManagerImpl.java:519) at org.infinispan.executors.LimitedExecutor.runTasks(LimitedExecutor.java:144) at org.infinispan.executors.LimitedExecutor.access$100(LimitedExecutor.java:33) at org.infinispan.executors.LimitedExecutor$Runner.run(LimitedExecutor.java:174) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) 1 - cc2744e9f509d917f1ed0ff1a18b28b72595af83 Thanks, Sanne