问题描述
我的应用程序通过 Infinispan Spring Boot Starter 使用 Infinispan 的 Spring Session 实现。我正在通过 InfinispanEmbeddedHttpSessionConfiguration 使用嵌入模式。 Spring Session integration documentation 非常稀疏，它没有提到会话缓存的推荐缓存模式。
我一直在使用 disT_SYNC 模式，但我注意到日志中偶尔会出现 ConcurrentModificationException 错误。有没有更合适的缓存模式，或者这可能是一个错误？
我使用的是 Spring Boot 2.2.10、Infinispan 9.4.20 和 Spring Session 2.2.0。该应用程序在 JDK 11 下运行。
编辑
我在日志中观察到的异常如下。我已经用 xxx. 代替了我公司的过滤器包名称。
在快速连续重复使用同一会话时会发生异常，特别是当我们的外部安全供应商每周对我们的应用进行扫描时。该异常不会每周发生。当它确实发生时，它会导致未获得 ConcurrentModificationException 的节点上最终出现 OutOfMemory 错误。堆中充满了 TrianglePerCacheInboundInvocationHander$1 对象。
我尝试通过运行 3 天并发请求来重现我们开发环境中的错误，但无济于事。
我查看了 Infinispan Spring Session 代码，我看到每个请求都有自己的 MapSession 实例，从存储在 Infinispan 中的序列化数据具体化。我看不到同一会话的多个并发请求如何导致 ConcurrentModificationException，而且我不知道我的应用程序中的任何地方都允许从多个线程并发访问 MapSession 实例。
04:46:25.758 ERROR o.i.r.r.RpcManagerImpl - ISPN000073: Unexpected error while replicating
java.util.ConcurrentModificationException: null
at java.base/java.util.HashMap$HashIterator.nextNode(HashMap.java:1493)
at java.base/java.util.HashMap$EntryIterator.next(HashMap.java:1526)
at java.base/java.util.HashMap$EntryIterator.next(HashMap.java:1524)
at org.infinispan.commons.marshall.MarshallUtil.marshallMap(MarshallUtil.java:52)
at org.infinispan.marshall.exts.MapExternalizer.writeObject(MapExternalizer.java:63)
at org.infinispan.marshall.exts.MapExternalizer.writeObject(MapExternalizer.java:31)
at org.infinispan.marshall.core.GlobalMarshaller.writeInternal(GlobalMarshaller.java:638)
at org.infinispan.marshall.core.GlobalMarshaller.writeInternalClean(GlobalMarshaller.java:643)
at org.infinispan.marshall.core.GlobalMarshaller.lambda$findWriter$0(GlobalMarshaller.java:369)
at org.jboss.marshalling.river.RiverMarshaller.doWriteObject(RiverMarshaller.java:137)
at org.jboss.marshalling.river.RiverMarshaller.doWriteFields(RiverMarshaller.java:1082)
at org.jboss.marshalling.river.RiverMarshaller.doWriteSerializableObject(RiverMarshaller.java:1040)
at org.jboss.marshalling.river.RiverMarshaller.doWriteObject(RiverMarshaller.java:920)
at org.jboss.marshalling.AbstractObjectOutput.writeObject(AbstractObjectOutput.java:58)
at org.jboss.marshalling.AbstractMarshaller.writeObject(AbstractMarshaller.java:111)
at org.infinispan.marshall.core.ExternalJBossMarshaller.objectToObjectStream(ExternalJBossMarshaller.java:36)
at org.infinispan.marshall.core.GlobalMarshaller.writerawUnkNown(GlobalMarshaller.java:617)
at org.infinispan.marshall.core.GlobalMarshaller.writeUnkNown(GlobalMarshaller.java:612)
at org.infinispan.marshall.core.GlobalMarshaller.writeNonNullableObject(GlobalMarshaller.java:412)
at org.infinispan.marshall.core.GlobalMarshaller.writeNullableObject(GlobalMarshaller.java:355)
at org.infinispan.marshall.core.BytesObjectOutput.writeObject(BytesObjectOutput.java:26)
at org.infinispan.commands.triangle.SingleKeyBackupWriteCommand.writeto(SingleKeyBackupWriteCommand.java:125)
at org.infinispan.marshall.exts.ReplicableCommandExternalizer.writeCommandParameters(ReplicableCommandExternalizer.java:71)
at org.infinispan.marshall.exts.CacheRpcCommandExternalizer.marshallParameters(CacheRpcCommandExternalizer.java:118)
at org.infinispan.marshall.exts.CacheRpcCommandExternalizer.writeObject(CacheRpcCommandExternalizer.java:114)
at org.infinispan.marshall.exts.CacheRpcCommandExternalizer.writeObject(CacheRpcCommandExternalizer.java:65)
at org.infinispan.marshall.core.GlobalMarshaller.writeInternal(GlobalMarshaller.java:638)
at org.infinispan.marshall.core.GlobalMarshaller.writeNonNullableObject(GlobalMarshaller.java:402)
at org.infinispan.marshall.core.GlobalMarshaller.writeNullableObject(GlobalMarshaller.java:355)
at org.infinispan.marshall.core.GlobalMarshaller.writeObjectOutput(GlobalMarshaller.java:183)
at org.infinispan.marshall.core.GlobalMarshaller.writeObjectOutput(GlobalMarshaller.java:176)
at org.infinispan.marshall.core.GlobalMarshaller.objectToBuffer(GlobalMarshaller.java:305)
at org.infinispan.remoting.transport.jgroups.jgroupsTransport.marshallRequest(jgroupsTransport.java:1031)
at org.infinispan.remoting.transport.jgroups.jgroupsTransport.sendCommand(jgroupsTransport.java:1217)
at org.infinispan.remoting.transport.jgroups.jgroupsTransport.sendToMany(jgroupsTransport.java:276)
at org.infinispan.remoting.rpc.RpcManagerImpl.sendToMany(RpcManagerImpl.java:390)
at org.infinispan.interceptors.distribution.TriangledistributionInterceptor.sendToBackups(TriangledistributionInterceptor.java:490)
at org.infinispan.interceptors.distribution.TriangledistributionInterceptor.lambda$localPrimaryOwnerWrite$4(TriangledistributionInterceptor.java:443)
at org.infinispan.interceptors.BaseAsyncInterceptor.invokeNextThenApply(BaseAsyncInterceptor.java:82)
at org.infinispan.interceptors.distribution.TriangledistributionInterceptor.localPrimaryOwnerWrite(TriangledistributionInterceptor.java:422)
at org.infinispan.interceptors.distribution.TriangledistributionInterceptor.handleSingleKeyWriteCommand(TriangledistributionInterceptor.java:392)
at org.infinispan.interceptors.distribution.TriangledistributionInterceptor.visitPutkeyvalueCommand(TriangledistributionInterceptor.java:113)
at org.infinispan.commands.write.PutkeyvalueCommand.acceptVisitor(PutkeyvalueCommand.java:73)
at org.infinispan.interceptors.BaseAsyncInterceptor.invokeNext(BaseAsyncInterceptor.java:55)
at org.infinispan.interceptors.BaseAsyncInterceptor.lambda$new$0(BaseAsyncInterceptor.java:23)
at org.infinispan.interceptors.InvocationSuccessFunction.apply(InvocationSuccessFunction.java:25)
at org.infinispan.interceptors.impl.SimpleAsyncInvocationStage.addCallback(SimpleAsyncInvocationStage.java:70)
at org.infinispan.interceptors.InvocationStage.thenApply(InvocationStage.java:45)
at org.infinispan.interceptors.BaseAsyncInterceptor.asyncInvokeNext(BaseAsyncInterceptor.java:225)
at org.infinispan.interceptors.impl.EntryWrappingInterceptor.setSkipRemoteGetsAndInvokeNextForDataCommand(EntryWrappingInterceptor.java:734)
at org.infinispan.interceptors.impl.EntryWrappingInterceptor.visitPutkeyvalueCommand(EntryWrappingInterceptor.java:337)
at org.infinispan.commands.write.PutkeyvalueCommand.acceptVisitor(PutkeyvalueCommand.java:73)
at org.infinispan.interceptors.BaseAsyncInterceptor.invokeNextAndFinally(BaseAsyncInterceptor.java:151)
at org.infinispan.interceptors.locking.AbstractLockingInterceptor.lambda$nonTxLockAndInvokeNext$1(AbstractLockingInterceptor.java:297)
at org.infinispan.interceptors.SyncInvocationStage.addCallback(SyncInvocationStage.java:42)
at org.infinispan.interceptors.InvocationStage.andHandle(InvocationStage.java:65)
at org.infinispan.interceptors.locking.AbstractLockingInterceptor.nonTxLockAndInvokeNext(AbstractLockingInterceptor.java:292)
at org.infinispan.interceptors.locking.AbstractLockingInterceptor.visitNonTxDataWriteCommand(AbstractLockingInterceptor.java:128)
at org.infinispan.interceptors.locking.NonTransactionalLockingInterceptor.visitDataWriteCommand(NonTransactionalLockingInterceptor.java:40)
at org.infinispan.interceptors.locking.AbstractLockingInterceptor.visitPutkeyvalueCommand(AbstractLockingInterceptor.java:82)
at org.infinispan.commands.write.PutkeyvalueCommand.acceptVisitor(PutkeyvalueCommand.java:73)
at org.infinispan.interceptors.BaseAsyncInterceptor.invokeNextAndHandle(BaseAsyncInterceptor.java:184)
at org.infinispan.statetransfer.StateTransferInterceptor.handleNonTxWriteCommand(StateTransferInterceptor.java:309)
at org.infinispan.statetransfer.StateTransferInterceptor.handleWriteCommand(StateTransferInterceptor.java:252)
at org.infinispan.statetransfer.StateTransferInterceptor.visitPutkeyvalueCommand(StateTransferInterceptor.java:96)
at org.infinispan.commands.write.PutkeyvalueCommand.acceptVisitor(PutkeyvalueCommand.java:73)
at org.infinispan.interceptors.BaseAsyncInterceptor.invokeNextAndFinally(BaseAsyncInterceptor.java:151)
at org.infinispan.interceptors.impl.CacheMgmtInterceptor.updateStoreStatistics(CacheMgmtInterceptor.java:220)
at org.infinispan.interceptors.impl.CacheMgmtInterceptor.visitPutkeyvalueCommand(CacheMgmtInterceptor.java:182)
at org.infinispan.commands.write.PutkeyvalueCommand.acceptVisitor(PutkeyvalueCommand.java:73)
at org.infinispan.interceptors.BaseAsyncInterceptor.invokeNext(BaseAsyncInterceptor.java:55)
at org.infinispan.interceptors.DDAsyncInterceptor.handleDefault(DDAsyncInterceptor.java:54)
at org.infinispan.interceptors.DDAsyncInterceptor.visitPutkeyvalueCommand(DDAsyncInterceptor.java:60)
at org.infinispan.commands.write.PutkeyvalueCommand.acceptVisitor(PutkeyvalueCommand.java:73)
at org.infinispan.interceptors.BaseAsyncInterceptor.invokeNextAndExceptionally(BaseAsyncInterceptor.java:124)
at org.infinispan.interceptors.impl.InvocationContextInterceptor.visitCommand(InvocationContextInterceptor.java:90)
at org.infinispan.interceptors.BaseAsyncInterceptor.invokeNext(BaseAsyncInterceptor.java:57)
at org.infinispan.interceptors.DDAsyncInterceptor.handleDefault(DDAsyncInterceptor.java:54)
at org.infinispan.interceptors.DDAsyncInterceptor.visitPutkeyvalueCommand(DDAsyncInterceptor.java:60)
at org.infinispan.commands.write.PutkeyvalueCommand.acceptVisitor(PutkeyvalueCommand.java:73)
at org.infinispan.interceptors.DDAsyncInterceptor.visitCommand(DDAsyncInterceptor.java:50)
at org.infinispan.interceptors.impl.AsyncInterceptorChainImpl.invoke(AsyncInterceptorChainImpl.java:248)
at org.infinispan.cache.impl.CacheImpl.executeCommandAndCommitIfNeeded(CacheImpl.java:1915)
at org.infinispan.cache.impl.CacheImpl.put(CacheImpl.java:1430)
at org.infinispan.cache.impl.CacheImpl.put(CacheImpl.java:2040)
at org.infinispan.cache.impl.CacheImpl.put(CacheImpl.java:1415)
at org.infinispan.cache.impl.CacheImpl.put(CacheImpl.java:235)
at org.infinispan.cache.impl.AbstractDelegatingCache.put(AbstractDelegatingCache.java:116)
at org.infinispan.cache.impl.EncoderCache.put(EncoderCache.java:195)
at org.infinispan.spring.common.provider.SpringCache.put(SpringCache.java:159)
at org.infinispan.spring.common.session.AbstractInfinispanSessionRepository.updateTTL(AbstractInfinispanSessionRepository.java:112)
at org.infinispan.spring.common.session.AbstractInfinispanSessionRepository.lambda$getSession$1(AbstractInfinispanSessionRepository.java:105)
at java.base/java.util.Optional.map(Optional.java:265)
at org.infinispan.spring.common.session.AbstractInfinispanSessionRepository.getSession(AbstractInfinispanSessionRepository.java:105)
at org.infinispan.spring.common.session.AbstractInfinispanSessionRepository.findById(AbstractInfinispanSessionRepository.java:79)
at org.infinispan.spring.common.session.AbstractInfinispanSessionRepository.findById(AbstractInfinispanSessionRepository.java:32)
at org.springframework.session.web.http.SessionRepositoryFilter$SessionRepositoryRequestWrapper.getRequestedSession(SessionRepositoryFilter.java:351)
at org.springframework.session.web.http.SessionRepositoryFilter$SessionRepositoryRequestWrapper.getSession(SessionRepositoryFilter.java:289)
at org.springframework.session.web.http.SessionRepositoryFilter$SessionRepositoryRequestWrapper.getSession(SessionRepositoryFilter.java:192)
at javax.servlet.http.HttpServletRequestWrapper.getSession(HttpServletRequestWrapper.java:244)
at xxx.MaxSimultaneousRequestsFilter.getKey(MaxSimultaneousRequestsFilter.java:266)
at xxx.MaxSimultaneousRequestsFilter.doFilter(MaxSimultaneousRequestsFilter.java:109)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at xxx.LoginFilter.doFilter(LoginFilter.java:49)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at xxx.BigIPFilter.doFilter(BigIPFilter.java:41)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at xxx.EncodingFilter.doFilter(EncodingFilter.java:36)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.springframework.session.web.http.SessionRepositoryFilter.doFilterInternal(SessionRepositoryFilter.java:141)
at org.springframework.session.web.http.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:82)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at xxx.ExcludeSessionRepositoryFilter.doFilter(ExcludeSessionRepositoryFilter.java:78)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:541)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:143)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:374)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1590)
at org.apache.tomcat.util.net.socketProcessorBase.run(SocketProcessorBase.java:49)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.base/java.lang.Thread.run(Thread.java:834)
Caused by: org.jboss.marshalling.Traceinformation: null
解决方法
对会话使用 DIST_SYNC 模式应该没问题。
如果在序列化会话属性时抛出 ConcurrentModificationException，则表明应用程序在将其插入会话后正在修改属性值，并且不应该这样做。
如果在序列化会话本身时发生 ConcurrentModificationException，则可能是 Infinispan Spring Session 集成中的错误。
如果 ConcurrentModificationException 根本与序列化无关，则相同。我建议在您的问题中发布完整的堆栈跟踪，或者为 Infinispan Zulip Chat 注册一个帐户并在那里发布异常。
最后要注意的是，Infinispan 9.4.20 已经很老了，最终的错误修复可能只会在 Infinispan 12.x 中出现。