jboss - Infinispan 集群同步问题

Question

我们使用具有 6 个实例的 JBoss 集群 (EAP 6.4.10)，并大量使用捆绑的 Infinispan 5.2.11 来处理不同的内存网格用例。然而，它们中的大多数是分布式缓存(实际上是复制的)。我们还将分布式事务和 JMS 绑定(bind)到混合中的事务边界。后端是 SQL Server 2016 Enterprise，即使在这里事务也可以跨越多个 SQL Server 实例和数据库 (DTC)。
Infinispan 的同步是通过使用 JGroups 3.2.13 的 UDP 多播完成的

有时，尤其是在重负载下或之后，我们会遇到 JBoss 工作线程堆积在看似永远不会被释放的特定 Infinispan 内部锁上的问题。因此，http 连接池饥饿，数据库上的打开事务不会被提交或回滚； JMS 消息丢失；我们在数据库上面临一堆锁，这些锁会影响连接到相同数据库的所有其他系统(它们是集群中的其他 JBoss 实例)。

目前我们观察 http 线程池，一旦线程开始堆积一定时间，实例就会从负载均衡器中删除并关闭。
有时这是不必要的，即集群自行修复并且罪魁祸首实例在没有人工干预的情况下再次开始正常运行。
但是，通常唯一的方法是手动重新启动实例并保持手指交叉以再次形成正确的 infinispan 集群。

来自挂起实例的堆栈跟踪总是显示几个有趣的特性:

一组线程(http worker)堆积在 JGroup 的流控制实现深处的一个条件上；在这些情况下，应用程序的最后一次调用通常是对分布式缓存的一些操作(例如 remove() ):

http-threads - 178 awaiting notification on [ 0x0000000374059958 ]
    at sun.misc.Unsafe.park(Native Method)
    at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
    at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2163)
    at org.jgroups.util.CreditMap.decrement(CreditMap.java:157)
    at org.jgroups.protocols.MFC.handleDownMessage(MFC.java:104)
    at org.jgroups.protocols.FlowControl.down(FlowControl.java:341)
    at org.jgroups.protocols.FRAG2.down(FRAG2.java:148)
    at org.jgroups.protocols.RSVP.down(RSVP.java:143)
    at org.jgroups.stack.ProtocolStack.down(ProtocolStack.java:1030)
    at org.jgroups.JChannel.down(JChannel.java:722)
    at org.jgroups.blocks.MessageDispatcher$ProtocolAdapter.down(MessageDispatcher.java:618)
    at org.jgroups.blocks.RequestCorrelator.sendRequest(RequestCorrelator.java:174)
    at org.jgroups.blocks.GroupRequest.sendRequest(GroupRequest.java:360)
    at org.jgroups.blocks.GroupRequest.sendRequest(GroupRequest.java:103)
    at org.jgroups.blocks.Request.execute(Request.java:83)
    at org.jgroups.blocks.MessageDispatcher.cast(MessageDispatcher.java:337)
    at org.jgroups.blocks.MessageDispatcher.castMessage(MessageDispatcher.java:249)
    at org.infinispan.remoting.transport.jgroups.CommandAwareRpcDispatcher.processCalls(CommandAwareRpcDispatcher.java:333)
    at org.infinispan.remoting.transport.jgroups.CommandAwareRpcDispatcher.invokeRemoteCommands(CommandAwareRpcDispatcher.java:146)
    at org.infinispan.remoting.transport.jgroups.CommandAwareRpcDispatcher.broadcastRemoteCommands(CommandAwareRpcDispatcher.java:197)
    at org.infinispan.remoting.transport.jgroups.JGroupsTransport.invokeRemotely(JGroupsTransport.java:498)
    at org.infinispan.remoting.rpc.RpcManagerImpl.invokeRemotely(RpcManagerImpl.java:173)
    at org.infinispan.remoting.rpc.RpcManagerImpl.invokeRemotely(RpcManagerImpl.java:194)
    at org.infinispan.remoting.rpc.RpcManagerImpl.invokeRemotely(RpcManagerImpl.java:251)
    at org.infinispan.remoting.rpc.RpcManagerImpl.invokeRemotely(RpcManagerImpl.java:238)
    at org.infinispan.remoting.rpc.RpcManagerImpl.invokeRemotely(RpcManagerImpl.java:233)
    at org.infinispan.remoting.rpc.RpcManagerImpl.broadcastRpcCommand(RpcManagerImpl.java:212)
    at org.infinispan.remoting.rpc.RpcManagerImpl.broadcastRpcCommand(RpcManagerImpl.java:204)
    at org.infinispan.interceptors.ReplicationInterceptor.handleCrudMethod(ReplicationInterceptor.java:307)
    at org.infinispan.interceptors.ReplicationInterceptor.visitRemoveCommand(ReplicationInterceptor.java:269)
    at org.infinispan.commands.write.RemoveCommand.acceptVisitor(RemoveCommand.java:73)
    at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:120)
    at org.infinispan.interceptors.EntryWrappingInterceptor.invokeNextAndApplyChanges(EntryWrappingInterceptor.java:302)
    at org.infinispan.interceptors.EntryWrappingInterceptor.visitRemoveCommand(EntryWrappingInterceptor.java:207)
    at org.infinispan.commands.write.RemoveCommand.acceptVisitor(RemoveCommand.java:73)
    at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:120)
    at org.infinispan.interceptors.locking.NonTransactionalLockingInterceptor.visitRemoveCommand(NonTransactionalLockingInterceptor.java:124)
    at org.infinispan.commands.write.RemoveCommand.acceptVisitor(RemoveCommand.java:73)
    at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:120)
    at org.infinispan.interceptors.base.CommandInterceptor.handleDefault(CommandInterceptor.java:134)
    at org.infinispan.commands.AbstractVisitor.visitRemoveCommand(AbstractVisitor.java:67)
    at org.infinispan.commands.write.RemoveCommand.acceptVisitor(RemoveCommand.java:73)
    at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:120)
    at org.infinispan.interceptors.base.CommandInterceptor.handleDefault(CommandInterceptor.java:134)
    at org.infinispan.commands.AbstractVisitor.visitRemoveCommand(AbstractVisitor.java:67)
    at org.infinispan.commands.write.RemoveCommand.acceptVisitor(RemoveCommand.java:73)
    at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:120)
    at org.infinispan.statetransfer.StateTransferInterceptor.handleTopologyAffectedCommand(StateTransferInterceptor.java:284)
    at org.infinispan.statetransfer.StateTransferInterceptor.handleNonTxWriteCommand(StateTransferInterceptor.java:222)
    at org.infinispan.statetransfer.StateTransferInterceptor.visitRemoveCommand(StateTransferInterceptor.java:171)
    at org.infinispan.commands.write.RemoveCommand.acceptVisitor(RemoveCommand.java:73)
    at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:120)
    at org.infinispan.interceptors.CacheMgmtInterceptor.visitRemoveCommand(CacheMgmtInterceptor.java:137)
    at org.infinispan.commands.write.RemoveCommand.acceptVisitor(RemoveCommand.java:73)
    at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:120)
    at org.infinispan.interceptors.InvocationContextInterceptor.handleAll(InvocationContextInterceptor.java:128)
    at org.infinispan.interceptors.InvocationContextInterceptor.handleDefault(InvocationContextInterceptor.java:92)
    at org.infinispan.commands.AbstractVisitor.visitRemoveCommand(AbstractVisitor.java:67)
    at org.infinispan.commands.write.RemoveCommand.acceptVisitor(RemoveCommand.java:73)
    at org.infinispan.interceptors.InterceptorChain.invoke(InterceptorChain.java:343)
    at org.infinispan.CacheImpl.executeCommandAndCommitIfNeeded(CacheImpl.java:1186)
    at org.infinispan.CacheImpl.removeInternal(CacheImpl.java:314)
    at org.infinispan.CacheImpl.remove(CacheImpl.java:308)
    at org.infinispan.CacheImpl.remove(CacheImpl.java:302)
    at org.infinispan.AbstractDelegatingCache.remove(AbstractDelegatingCache.java:313)
    at com.company.project.information.AuthenticationService.processChallengeImpl(AuthenticationService.java:155)
    at com.company.project.information.AuthenticationService.processChallengeForLogin(AuthenticationService.java:132)
    at com.company.project.information.AuthenticationService.respondChallenge(AuthenticationService.java:418)
    at com.company.project.security.auth.ServerLoginModule.verify(ServerLoginModule.java:280)
    at com.company.project.security.auth.ServerLoginModule._login(ServerLoginModule.java:166)
    at com.company.project.security.auth.ServerLoginModule.login(ServerLoginModule.java:87)
    at sun.reflect.GeneratedMethodAccessor487.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at javax.security.auth.login.LoginContext.invoke(LoginContext.java:755)
    at javax.security.auth.login.LoginContext.access$000(LoginContext.java:195)
    at javax.security.auth.login.LoginContext$4.run(LoginContext.java:682)
    at javax.security.auth.login.LoginContext$4.run(LoginContext.java:680)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.security.auth.login.LoginContext.invokePriv(LoginContext.java:680)
    at javax.security.auth.login.LoginContext.login(LoginContext.java:587)
    at org.jboss.security.authentication.JBossCachedAuthenticationManager.defaultLogin(JBossCachedAuthenticationManager.java:399)
    at org.jboss.security.authentication.JBossCachedAuthenticationManager.proceedWithJaasLogin(JBossCachedAuthenticationManager.java:338)
    at org.jboss.security.authentication.JBossCachedAuthenticationManager.authenticate(JBossCachedAuthenticationManager.java:326)
    at org.jboss.security.authentication.JBossCachedAuthenticationManager.isValid(JBossCachedAuthenticationManager.java:142)
    at org.jboss.as.security.service.SimpleSecurityManager.authenticate(SimpleSecurityManager.java:418)
    at org.jboss.as.security.service.SimpleSecurityManager.authenticate(SimpleSecurityManager.java:377)
    at org.jboss.as.ejb3.security.SecurityContextInterceptor$1.run(SecurityContextInterceptor.java:54)
    at org.jboss.as.ejb3.security.SecurityContextInterceptor$1.run(SecurityContextInterceptor.java:48)
    at org.jboss.as.ejb3.security.SecurityContextInterceptor.processInvocation(SecurityContextInterceptor.java:86)
    at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288)
    at org.jboss.as.ejb3.deployment.processors.StartupAwaitInterceptor.processInvocation(StartupAwaitInterceptor.java:22)
    at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288)
    at org.jboss.as.ejb3.component.interceptors.ShutDownInterceptorFactory$1.processInvocation(ShutDownInterceptorFactory.java:64)
    at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288)
    at org.jboss.as.ejb3.component.interceptors.LoggingInterceptor.processInvocation(LoggingInterceptor.java:59)
    at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288)
    at org.jboss.as.ee.component.NamespaceContextInterceptor.processInvocation(NamespaceContextInterceptor.java:50)
    at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288)
    at org.jboss.as.ejb3.component.interceptors.AdditionalSetupInterceptor.processInvocation(AdditionalSetupInterceptor.java:55)
    at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288)
    at org.jboss.as.ee.component.TCCLInterceptor.processInvocation(TCCLInterceptor.java:45)
    at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288)
    at org.jboss.invocation.ChainedInterceptor.processInvocation(ChainedInterceptor.java:61)
    at org.jboss.as.ee.component.ViewService$View.invoke(ViewService.java:189)
    at org.jboss.as.ejb3.remote.LocalEjbReceiver.processInvocation(LocalEjbReceiver.java:271)
    at org.jboss.ejb.client.EJBClientInvocationContext.sendRequest(EJBClientInvocationContext.java:184)
    at org.jboss.ejb.client.EJBObjectInterceptor.handleInvocation(EJBObjectInterceptor.java:58)
    at org.jboss.ejb.client.EJBClientInvocationContext.sendRequest(EJBClientInvocationContext.java:186)
    at org.jboss.ejb.client.EJBHomeInterceptor.handleInvocation(EJBHomeInterceptor.java:83)
    at org.jboss.ejb.client.EJBClientInvocationContext.sendRequest(EJBClientInvocationContext.java:186)
    at org.jboss.ejb.client.TransactionInterceptor.handleInvocation(TransactionInterceptor.java:42)
    at org.jboss.ejb.client.EJBClientInvocationContext.sendRequest(EJBClientInvocationContext.java:186)
    at org.jboss.ejb.client.ReceiverInterceptor.handleInvocation(ReceiverInterceptor.java:125)
    at org.jboss.ejb.client.EJBClientInvocationContext.sendRequest(EJBClientInvocationContext.java:186)
    at com.company.project.module.service.CallIdPropagator$1.handleInvocation(CallIdPropagator.java:60)
    at org.jboss.ejb.client.EJBClientInvocationContext.sendRequest(EJBClientInvocationContext.java:186)
    at org.jboss.ejb.client.EJBInvocationHandler.sendRequestWithPossibleRetries(EJBInvocationHandler.java:255)
    at org.jboss.ejb.client.EJBInvocationHandler.doInvoke(EJBInvocationHandler.java:200)
    at org.jboss.ejb.client.EJBInvocationHandler.doInvoke(EJBInvocationHandler.java:183)
    at org.jboss.ejb.client.EJBInvocationHandler.invoke(EJBInvocationHandler.java:146)
    at com.sun.proxy.$Proxy653.hasOneOfThisNetworkFeatures(
    Unknown Source)
    at sun.reflect.GeneratedMethodAccessor773.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at com.cgm.life.clientservices.Invoker.doPost(Invoker.java:129)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:754)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:295)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:231)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:149)
    at org.jboss.as.jpa.interceptor.WebNonTxEmCloserValve.invoke(WebNonTxEmCloserValve.java:50)
    at org.jboss.as.jpa.interceptor.WebNonTxEmCloserValve.invoke(WebNonTxEmCloserValve.java:50)
    at org.jboss.as.web.security.SecurityContextAssociationValve.invoke(SecurityContextAssociationValve.java:169)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:150)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:97)
    at org.jboss.web.rewrite.RewriteValve.invoke(RewriteValve.java:466)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:102)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:344)
    at org.apache.coyote.ajp.AjpAprProcessor.process(AjpAprProcessor.java:475)
    at org.apache.coyote.ajp.AjpAprProtocol$AjpConnectionHandler.process(AjpAprProtocol.java:454)
    at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2562)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)
    at org.jboss.threads.JBossThread.run(JBossThread.java:122)

(完整的堆栈跟踪只是为了给你整个画面)。本例中的条件 (0x0000000374059958) 阻塞了数百个具有不同堆栈跟踪的线程；不过，它们都共享对某些分布式缓存的调用。

另一组线程(似乎是 UDP 协议(protocol)处理程序，我们有一大堆)也是 awaiting notification在一个物体上。上下文似乎与 Infinispan 集群中的状态转移有关:

Incoming-8,shared=udp awaiting notification on [ 0x00000003810b5188 ]
    at java.lang.Object.wait(Native Method)
    at java.lang.Object.wait(Object.java:502)
    at org.infinispan.statetransfer.StateTransferLockImpl.waitForTransactionData(StateTransferLockImpl.java:100)
    at org.infinispan.statetransfer.StateTransferInterceptor.updateTopologyIdAndWaitForTransactionData(StateTransferInterceptor.java:311)
    at org.infinispan.statetransfer.StateTransferInterceptor.handleTopologyAffectedCommand(StateTransferInterceptor.java:281)
    at org.infinispan.statetransfer.StateTransferInterceptor.handleNonTxWriteCommand(StateTransferInterceptor.java:222)
    at org.infinispan.statetransfer.StateTransferInterceptor.visitPutKeyValueCommand(StateTransferInterceptor.java:156)
    at org.infinispan.commands.write.PutKeyValueCommand.acceptVisitor(PutKeyValueCommand.java:82)
    at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:120)
    at org.infinispan.interceptors.InvocationContextInterceptor.handleAll(InvocationContextInterceptor.java:128)
    at org.infinispan.interceptors.InvocationContextInterceptor.handleDefault(InvocationContextInterceptor.java:92)
    at org.infinispan.commands.AbstractVisitor.visitPutKeyValueCommand(AbstractVisitor.java:62)
    at org.infinispan.commands.write.PutKeyValueCommand.acceptVisitor(PutKeyValueCommand.java:82)
    at org.infinispan.interceptors.InterceptorChain.invoke(InterceptorChain.java:343)
    at org.infinispan.commands.remote.BaseRpcInvokingCommand.processVisitableCommand(BaseRpcInvokingCommand.java:61)
    at org.infinispan.commands.remote.SingleRpcCommand.perform(SingleRpcCommand.java:70)
    at org.infinispan.remoting.InboundInvocationHandlerImpl.handleInternal(InboundInvocationHandlerImpl.java:100)
    at org.infinispan.remoting.InboundInvocationHandlerImpl.handleWithWaitForBlocks(InboundInvocationHandlerImpl.java:121)
    at org.infinispan.remoting.InboundInvocationHandlerImpl.handle(InboundInvocationHandlerImpl.java:85)
    at org.infinispan.remoting.transport.jgroups.CommandAwareRpcDispatcher.executeCommandFromLocalCluster(CommandAwareRpcDispatcher.java:247)
    at org.infinispan.remoting.transport.jgroups.CommandAwareRpcDispatcher.handle(CommandAwareRpcDispatcher.java:220)
    at org.jgroups.blocks.RequestCorrelator.handleRequest(RequestCorrelator.java:484)
    at org.jgroups.blocks.RequestCorrelator.receiveMessage(RequestCorrelator.java:391)
    at org.jgroups.blocks.RequestCorrelator.receive(RequestCorrelator.java:249)
    at org.jgroups.blocks.MessageDispatcher$ProtocolAdapter.up(MessageDispatcher.java:600)
    at org.jgroups.blocks.mux.MuxUpHandler.up(MuxUpHandler.java:130)
    at org.jgroups.JChannel.up(JChannel.java:707)
    at org.jgroups.stack.ProtocolStack.up(ProtocolStack.java:1025)
    at org.jgroups.protocols.RSVP.up(RSVP.java:188)
    at org.jgroups.protocols.FRAG2.up(FRAG2.java:182)
    at org.jgroups.protocols.FlowControl.up(FlowControl.java:400)
    at org.jgroups.protocols.FlowControl.up(FlowControl.java:418)
    at org.jgroups.protocols.pbcast.GMS.up(GMS.java:897)
    at org.jgroups.protocols.pbcast.STABLE.up(STABLE.java:247)
    at org.jgroups.protocols.UNICAST2.up(UNICAST2.java:453)
    at org.jgroups.protocols.pbcast.NAKACK.handleMessage(NAKACK.java:793)
    at org.jgroups.protocols.pbcast.NAKACK.up(NAKACK.java:609)
    at org.jgroups.protocols.VERIFY_SUSPECT.up(VERIFY_SUSPECT.java:147)
    at org.jgroups.protocols.FD.up(FD.java:253)
    at org.jgroups.protocols.FD_SOCK.up(FD_SOCK.java:288)
    at org.jgroups.protocols.MERGE3.up(MERGE3.java:290)
    at org.jgroups.protocols.Discovery.up(Discovery.java:359)
    at org.jgroups.protocols.TP$ProtocolAdapter.up(TP.java:2616)
    at org.jgroups.protocols.TP.passMessageUp(TP.java:1269)
    at org.jgroups.protocols.TP$IncomingPacket.handleMyMessage(TP.java:1831)
    at org.jgroups.protocols.TP$IncomingPacket.run(TP.java:1804)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)

只有 4 个线程正在等待此通知。

然而，还有更多的线程(比如，数百个)在不同的对象上等待，但在代码中的相同位置:

OOB-4950,shared=udp awaiting notification on [ 0x000000038bccd2b0 ]
OOB-4951,shared=udp awaiting notification on [ 0x00000003bacf4930 ]
OOB-4952,shared=udp awaiting notification on [ 0x000000038bccd2b0 ]
OOB-4953,shared=udp awaiting notification on [ 0x000000038bccd2b0 ]
OOB-4954,shared=udp awaiting notification on [ 0x00000003bacf4930 ]
OOB-4956,shared=udp awaiting notification on [ 0x000000038bccd2b0 ]
OOB-4958,shared=udp awaiting notification on [ 0x000000038bccd2b0 ]
    at java.lang.Object.wait(Native Method)
    at java.lang.Object.wait(Object.java:502)
    at org.infinispan.statetransfer.StateTransferLockImpl.waitForTransactionData(StateTransferLockImpl.java:100)
    at org.infinispan.statetransfer.StateTransferInterceptor.updateTopologyIdAndWaitForTransactionData(StateTransferInterceptor.java:311)
    at org.infinispan.statetransfer.StateTransferInterceptor.handleTopologyAffectedCommand(StateTransferInterceptor.java:281)
    at org.infinispan.statetransfer.StateTransferInterceptor.handleNonTxWriteCommand(StateTransferInterceptor.java:222)
    at org.infinispan.statetransfer.StateTransferInterceptor.visitRemoveCommand(StateTransferInterceptor.java:171)
    at org.infinispan.commands.write.RemoveCommand.acceptVisitor(RemoveCommand.java:73)
    at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:120)
    at org.infinispan.interceptors.CacheMgmtInterceptor.visitRemoveCommand(CacheMgmtInterceptor.java:137)
    at org.infinispan.commands.write.RemoveCommand.acceptVisitor(RemoveCommand.java:73)
    at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:120)
    at org.infinispan.interceptors.InvocationContextInterceptor.handleAll(InvocationContextInterceptor.java:128)
    at org.infinispan.interceptors.InvocationContextInterceptor.handleDefault(InvocationContextInterceptor.java:92)
    at org.infinispan.commands.AbstractVisitor.visitRemoveCommand(AbstractVisitor.java:67)
    at org.infinispan.commands.write.RemoveCommand.acceptVisitor(RemoveCommand.java:73)
    at org.infinispan.interceptors.InterceptorChain.invoke(InterceptorChain.java:343)
    at org.infinispan.commands.remote.BaseRpcInvokingCommand.processVisitableCommand(BaseRpcInvokingCommand.java:61)
    at org.infinispan.commands.remote.SingleRpcCommand.perform(SingleRpcCommand.java:70)
    at org.infinispan.remoting.InboundInvocationHandlerImpl.handleInternal(InboundInvocationHandlerImpl.java:100)
    at org.infinispan.remoting.InboundInvocationHandlerImpl.handleWithWaitForBlocks(InboundInvocationHandlerImpl.java:121)
    at org.infinispan.remoting.InboundInvocationHandlerImpl.handle(InboundInvocationHandlerImpl.java:85)
    at org.infinispan.remoting.transport.jgroups.CommandAwareRpcDispatcher.executeCommandFromLocalCluster(CommandAwareRpcDispatcher.java:247)
    at org.infinispan.remoting.transport.jgroups.CommandAwareRpcDispatcher.handle(CommandAwareRpcDispatcher.java:220)
    at org.jgroups.blocks.RequestCorrelator.handleRequest(RequestCorrelator.java:484)
    at org.jgroups.blocks.RequestCorrelator.receiveMessage(RequestCorrelator.java:391)
    at org.jgroups.blocks.RequestCorrelator.receive(RequestCorrelator.java:249)
    at org.jgroups.blocks.MessageDispatcher$ProtocolAdapter.up(MessageDispatcher.java:600)
    at org.jgroups.blocks.mux.MuxUpHandler.up(MuxUpHandler.java:130)
    at org.jgroups.JChannel.up(JChannel.java:707)
    at org.jgroups.stack.ProtocolStack.up(ProtocolStack.java:1025)
    at org.jgroups.protocols.RSVP.up(RSVP.java:188)
    at org.jgroups.protocols.FRAG2.up(FRAG2.java:182)
    at org.jgroups.protocols.FlowControl.up(FlowControl.java:400)
    at org.jgroups.protocols.FlowControl.up(FlowControl.java:418)
    at org.jgroups.protocols.pbcast.GMS.up(GMS.java:897)
    at org.jgroups.protocols.pbcast.STABLE.up(STABLE.java:247)
    at org.jgroups.protocols.UNICAST2.up(UNICAST2.java:453)
    at org.jgroups.protocols.pbcast.NAKACK.handleMessage(NAKACK.java:751)
    at org.jgroups.protocols.pbcast.NAKACK.up(NAKACK.java:609)
    at org.jgroups.protocols.VERIFY_SUSPECT.up(VERIFY_SUSPECT.java:147)
    at org.jgroups.protocols.FD.up(FD.java:253)
    at org.jgroups.protocols.FD_SOCK.up(FD_SOCK.java:288)
    at org.jgroups.protocols.MERGE3.up(MERGE3.java:290)
    at org.jgroups.protocols.Discovery.up(Discovery.java:359)
    at org.jgroups.protocols.TP$ProtocolAdapter.up(TP.java:2616)
    at org.jgroups.protocols.TP.passMessageUp(TP.java:1269)
    at org.jgroups.protocols.TP$IncomingPacket.handleMyMessage(TP.java:1831)
    at org.jgroups.protocols.TP$IncomingPacket.run(TP.java:1804)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)

还有一些线程在等待一个锁，该锁由等待 (1) 中的条件的线程持有:

Transaction Reaper Worker 9 waiting to acquire [ 0x0000000507058c88 ]                                    
    at com.arjuna.ats.arjuna.coordinator.TwoPhaseCoordinator.afterCompletion(TwoPhaseCoordinator.java:356
    at com.arjuna.ats.arjuna.coordinator.TwoPhaseCoordinator.afterCompletion(TwoPhaseCoordinator.java:334
    at com.arjuna.ats.arjuna.coordinator.TwoPhaseCoordinator.cancel(TwoPhaseCoordinator.java:120)        
    at com.arjuna.ats.arjuna.AtomicAction.cancel(AtomicAction.java:215)                                  
    at com.arjuna.ats.arjuna.coordinator.TransactionReaper.doCancellations(TransactionReaper.java:370)   
    at com.arjuna.ats.internal.arjuna.coordinator.ReaperWorkerThread.run(ReaperWorkerThread.java:78)

其中一个 http 线程持有 0x0000000507058c88反过来等待0x0000000374059958

这就是我可以从系统中读取的内容。里面严重卡了东西，但我不知道如何分析或排除故障，更不用说解决问题了。 (我们尝试更新到 EAP 6.4.20，但在这里可以观察到相同的行为，因此我们回滚了此更新，因为更新后出现了其他更新、更 Shiny 的问题)。

我很乐意提供有助于诊断问题的更多信息(如特定配置参数)。

感谢任何人的帮助!

最好的，
马库斯

Answer 1

事实证明，监控 GC 日志中的有趣事件非常有意义…… x_X
情况是我们遇到了旧代 CMS 碎片，Java 虚拟机定期决定暂停应用程序服务器长达 45 秒以进行碎片整理。
我们切换到 G1，这些停顿以及 Infinispan 去同步也消失了。在过去的几个月里，这个设置现在运行得相当稳定。