Clustered 2nd level cache sometimes throws NullPointerException when new node starts up --------------------------------------------------------------------------------------- Key: ISPN-8721 URL: https://issues.jboss.org/browse/ISPN-8721 Project: Infinispan Issue Type: Bug Components: Hibernate Cache Affects Versions: 9.1.4.Final Environment: jvm 1.8 Reporter: Tom Dearman Assignee: Tom Dearman Fix For: 9.2.0.Final Attachments: sample-app.cache.tar.gz There is a race condition in PutFromLoadValidator as it registers itself in the component registry before it is fully initialised. You can reproduce this by running the contained app against h2 server db. First start this app with default port. Then start the app on port '8080' and make a few requests to '/add' to create data. After that send continuous requests to '/update' in order change data and trigger the cache: for i in {code} {1..1000} ; do sleep 0.01; curl http://localhost:8080/update -X POST; done {code} Then start another instance of the app on port 8090: {code} java -jar test-app-0.0.1-SNAPSHOT.jar --server.port=8090 {code} Most of the time one of the updates will fail and the logs will show the following: {code} 2018-01-23 15:36:46 [main] DEBUG o.h.c.i.access.PutFromLoadValidator - Interceptor chain was: [org.infinispan.interceptors.InvocationContextInterceptor@407a7f2a, org.infinispan.interceptors.locking.NonTransactionalLockingInterceptor@4ea5b703, org.infinispan.interceptors.EntryWrappingInterceptor@2a7ed1f, org.infinispan.interceptors.InvalidationInterceptor@3fa247d1, org.infinispan.interceptors.CallInterceptor@2cb2fc20] 2018-01-23 15:36:46 [main] DEBUG o.h.c.i.access.PutFromLoadValidator - New interceptor chain is: [org.infinispan.interceptors.InvocationContextInterceptor@407a7f2a, org.infinispan.interceptors.locking.NonTransactionalLockingInterceptor@4ea5b703, org.hibernate.cache.infinispan.access.NonTxPutFromLoadInterceptor@495ee280, org.infinispan.interceptors.EntryWrappingInterceptor@2a7ed1f, org.hibernate.cache.infinispan.access.NonTxInvalidationInterceptor@4fa1c212, org.infinispan.interceptors.CallInterceptor@2cb2fc20] 2018-01-23 15:36:46 [main] TRACE o.i.manager.DefaultCacheManager - About to wire and start cache test.app.data.User-pending-puts 2018-01-23 15:36:46 [remote-thread--p2-t1] ERROR o.i.i.InvocationContextInterceptor - ISPN000136: Error executing command BeginInvalidationCommand, writing keys test.app.data.User#2 java.lang.NullPointerException: null at org.hibernate.cache.infinispan.access.PutFromLoadValidator.beginInvalidatingWithPFER(PutFromLoadValidator.java:561) at org.hibernate.cache.infinispan.access.PutFromLoadValidator.beginInvalidatingKey(PutFromLoadValidator.java:555) at org.hibernate.cache.infinispan.access.NonTxPutFromLoadInterceptor.visitInvalidateCommand(NonTxPutFromLoadInterceptor.java:70) at org.infinispan.commands.write.InvalidateCommand.acceptVisitor(InvalidateCommand.java:114) at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:99) at org.infinispan.interceptors.locking.AbstractLockingInterceptor.visitInvalidateCommand(AbstractLockingInterceptor.java:112) at org.infinispan.commands.write.InvalidateCommand.acceptVisitor(InvalidateCommand.java:114) at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:99) at org.infinispan.interceptors.InvocationContextInterceptor.handleAll(InvocationContextInterceptor.java:110) at org.infinispan.interceptors.InvocationContextInterceptor.handleDefault(InvocationContextInterceptor.java:79) at org.infinispan.commands.AbstractVisitor.visitInvalidateCommand(AbstractVisitor.java:127) at org.infinispan.commands.write.InvalidateCommand.acceptVisitor(InvalidateCommand.java:114) at org.infinispan.interceptors.InterceptorChain.invoke(InterceptorChain.java:335) at org.infinispan.commands.remote.BaseRpcInvokingCommand.processVisitableCommand(BaseRpcInvokingCommand.java:43) at org.infinispan.commands.remote.SingleRpcCommand.perform(SingleRpcCommand.java:51) at org.infinispan.remoting.inboundhandler.BasePerCacheInboundInvocationHandler.invokePerform(BasePerCacheInboundInvocationHandler.java:92) at org.infinispan.remoting.inboundhandler.BaseBlockingRunnable.run(BaseBlockingRunnable.java:34) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748) 2018-01-23 15:36:47 [main] TRACE o.i.manager.DefaultCacheManager - Closing latch for cache test.app.data.User-pending-puts {code}