ScatteredStreamIteratorTest random failure ------------------------------------------ Key: ISPN-12356 URL: https://issues.redhat.com/browse/ISPN-12356 Project: Infinispan Issue Type: Bug Components: Test Suite Affects Versions: 12.0.0.Dev03 Reporter: Will Burns Priority: Major The test can fail randomly https://ci.infinispan.org/job/Infinispan/job/PR-8699/4/testReport/junit/o... with {code} java.lang.NullPointerException at org.infinispan.remoting.transport.jgroups.JGroupsTransport.invokeCommand(JGroupsTransport.java:877) at org.infinispan.remoting.rpc.RpcManagerImpl.invokeCommand(RpcManagerImpl.java:146) at org.infinispan.reactive.publisher.impl.ClusterPublisherManagerImpl$SubscriberHandler.sendCancelCommand(ClusterPublisherManagerImpl.java:1077) at org.infinispan.reactive.publisher.impl.InnerPublisherSubscription.run(InnerPublisherSubscription.java:93) at io.reactivex.rxjava3.internal.operators.flowable.FlowableDoOnLifecycle$SubscriptionLambdaSubscriber.cancel(FlowableDoOnLifecycle.java:115) at io.reactivex.rxjava3.internal.subscriptions.SubscriptionArbiter.drainLoop(SubscriptionArbiter.java:221) at io.reactivex.rxjava3.internal.subscriptions.SubscriptionArbiter.drain(SubscriptionArbiter.java:190) at io.reactivex.rxjava3.internal.subscriptions.SubscriptionArbiter.cancel(SubscriptionArbiter.java:182) at io.reactivex.rxjava3.internal.subscriptions.SubscriptionArbiter.drainLoop(SubscriptionArbiter.java:221) at io.reactivex.rxjava3.internal.subscriptions.SubscriptionArbiter.drain(SubscriptionArbiter.java:190) at io.reactivex.rxjava3.internal.subscriptions.SubscriptionArbiter.cancel(SubscriptionArbiter.java:182) at io.reactivex.rxjava3.internal.subscriptions.SubscriptionHelper.cancel(SubscriptionHelper.java:181) at io.reactivex.rxjava3.internal.operators.flowable.BlockingFlowableIterable$BlockingFlowableIterator.run(BlockingFlowableIterable.java:173) at io.reactivex.rxjava3.internal.operators.flowable.BlockingFlowableIterable$BlockingFlowableIterator.hasNext(BlockingFlowableIterable.java:104) at org.infinispan.commons.util.Closeables$1.hasNext(Closeables.java:247) at org.infinispan.stream.DistributedStreamIteratorTest.lambda$verifyNodeLeavesBeforeGettingData$0(DistributedStreamIteratorTest.java:136) at org.infinispan.test.AbstractInfinispanTest$CallableWrapper.call(AbstractInfinispanTest.java:527) at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264) 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) {code} The assumption is that it is due to having no owner for a given segment, but further investigation is required.