Clustered Locks with zero-capacity throws ClassCastException ------------------------------------------------------------ Key: ISPN-12538 URL: https://issues.redhat.com/browse/ISPN-12538 Project: Infinispan Issue Type: Bug Components: Clustered Locks Affects Versions: 12.0.0.Dev07 Reporter: Ryan Emerson Assignee: Dan Berindei Priority: Major Fix For: 12.1.0.Final When creating a cluster with no explicit clustered-locks configuration, i.e. num_Owners is not defined, a `ClassCastException` is thrown if a zero-capacity node joins the cluster and attempts to use a lock: {code:java} 10:10:36,564 ERROR (non-blocking-thread--p2-t2) [org.infinispan.topology.LocalTopologyManagerImpl] ISPN000230: Failed to start rebalance for cache org.infinispan.LOCKS java.util.concurrent.CompletionException: java.lang.ClassCastException: class org.infinispan.distribution.ch.impl.ReplicatedConsistentHash cannot be cast to class org.infinispan.distribution.ch.impl.DefaultConsistentHash (org.infinispan.distribution.ch.impl.ReplicatedConsistentHash and org.infinispan.distribution.ch.impl.DefaultConsistentHash are in unnamed module of loader java.net.URLClassLoader @6d03e736) at java.base/java.util.concurrent.CompletableFuture.encodeRelay(CompletableFuture.java:367) at java.base/java.util.concurrent.CompletableFuture.completeRelay(CompletableFuture.java:376) at java.base/java.util.concurrent.CompletableFuture$UniRelay.tryFire(CompletableFuture.java:1019) at java.base/java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:506) at java.base/java.util.concurrent.CompletableFuture.completeExceptionally(CompletableFuture.java:2088) at org.infinispan.util.concurrent.ActionSequencer$SequenceEntry.accept(ActionSequencer.java:213) at org.infinispan.util.concurrent.ActionSequencer$SequenceEntry.accept(ActionSequencer.java:179) at java.base/java.util.concurrent.CompletableFuture.uniWhenComplete(CompletableFuture.java:859) at java.base/java.util.concurrent.CompletableFuture.uniWhenCompleteStage(CompletableFuture.java:883) at java.base/java.util.concurrent.CompletableFuture.whenComplete(CompletableFuture.java:2251) at java.base/java.util.concurrent.CompletableFuture.whenComplete(CompletableFuture.java:143) at org.infinispan.util.concurrent.ActionSequencer$SequenceEntry.run(ActionSequencer.java:227) at org.infinispan.util.concurrent.ActionSequencer$SequenceEntry.apply(ActionSequencer.java:219) at org.infinispan.util.concurrent.ActionSequencer$SequenceEntry.apply(ActionSequencer.java:179) at java.base/java.util.concurrent.CompletableFuture.uniHandle(CompletableFuture.java:930) at java.base/java.util.concurrent.CompletableFuture$UniHandle.tryFire(CompletableFuture.java:907) at java.base/java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:478) at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) at java.base/java.lang.Thread.run(Thread.java:834) Caused by: java.lang.ClassCastException: class org.infinispan.distribution.ch.impl.ReplicatedConsistentHash cannot be cast to class org.infinispan.distribution.ch.impl.DefaultConsistentHash (org.infinispan.distribution.ch.impl.ReplicatedConsistentHash and org.infinispan.distribution.ch.impl.DefaultConsistentHash are in unnamed module of loader java.net.URLClassLoader @6d03e736) at org.infinispan.distribution.ch.impl.SyncConsistentHashFactory.union(SyncConsistentHashFactory.java:58) at org.infinispan.topology.LocalTopologyManagerImpl.doHandleRebalance(LocalTopologyManagerImpl.java:562) at org.infinispan.topology.LocalTopologyManagerImpl.lambda$handleRebalance$16(LocalTopologyManagerImpl.java:531) at org.infinispan.topology.LocalTopologyManagerImpl.lambda$orderOnCache$24(LocalTopologyManagerImpl.java:736) at org.infinispan.util.concurrent.ActionSequencer.safeNonBlockingCall(ActionSequencer.java:57) at org.infinispan.util.concurrent.ActionSequencer.access$400(ActionSequencer.java:32) at org.infinispan.util.concurrent.ActionSequencer$SequenceEntry.run(ActionSequencer.java:226) ... 8 more {code} Previously zero-capacity node was not supported with replicated-caches, however this is no longer the case so it should be possible for clustered-locks to work with a replicated cache without defining num_owners.