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From "Stefan Guggisberg (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (JCR-3379) XA concurrent transactions - NullPointerException
Date Tue, 10 Jul 2012 08:51:34 GMT

     [ https://issues.apache.org/jira/browse/JCR-3379?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Stefan Guggisberg updated JCR-3379:
-----------------------------------

    Component/s: versioning
                 transactions
    
> XA concurrent transactions - NullPointerException
> -------------------------------------------------
>
>                 Key: JCR-3379
>                 URL: https://issues.apache.org/jira/browse/JCR-3379
>             Project: Jackrabbit Content Repository
>          Issue Type: Bug
>          Components: jackrabbit-core, transactions, versioning
>    Affects Versions: 2.4.2, 2.5
>         Environment: java version "1.6.0_26"
> Java(TM) SE Runtime Environment (build 1.6.0_26-b03)
> Java HotSpot(TM) 64-Bit Server VM (build 20.1-b02, mixed mode)
> Linux dev 2.6.32-5-amd64 #1 SMP Thu Mar 22 17:26:33 UTC 2012 x86_64 GNU/Linux
>            Reporter: Stanislav Dvorscak
>            Assignee: Claus Köll
>         Attachments: JCR-3379.patch
>
>
> If several threads are working with XA transactions, the NullPointerException is randomly
happened. After that each other transaction will deadlock on the Jackrabbit side, and the
restart of the server is necessary.
> The exception is:
> Exception in thread "executor-13" java.lang.NullPointerException
> 	at org.apache.jackrabbit.core.version.VersioningLock$XidRWLock.isSameGlobalTx(VersioningLock.java:116)
> 	at org.apache.jackrabbit.core.version.VersioningLock$XidRWLock.allowReader(VersioningLock.java:126)
> 	at org.apache.jackrabbit.core.version.VersioningLock$XidRWLock.endWrite(VersioningLock.java:161)
> 	at EDU.oswego.cs.dl.util.concurrent.WriterPreferenceReadWriteLock$WriterLock.release(Unknown
Source)
> 	at org.apache.jackrabbit.core.version.VersioningLock$WriteLock.release(VersioningLock.java:76)
> 	at org.apache.jackrabbit.core.version.InternalXAVersionManager$2.internalReleaseWriteLock(InternalXAVersionManager.java:703)
> 	at org.apache.jackrabbit.core.version.InternalXAVersionManager$2.commit(InternalXAVersionManager.java:691)
> 	at org.apache.jackrabbit.core.TransactionContext.commit(TransactionContext.java:195)
> 	at org.apache.jackrabbit.core.XASessionImpl.commit(XASessionImpl.java:326)
> 	at org.apache.jackrabbit.rmi.server.ServerXASession.commit(ServerXASession.java:58)
> 	at sun.reflect.GeneratedMethodAccessor17.invoke(Unknown Source)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> 	at java.lang.reflect.Method.invoke(Method.java:597)
> 	at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:305)
> 	at sun.rmi.transport.Transport$1.run(Transport.java:159)
> 	at java.security.AccessController.doPrivileged(Native Method)
> 	at sun.rmi.transport.Transport.serviceCall(Transport.java:155)
> 	at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:535)
> 	at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:790)
> 	at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:649)
> 	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
> 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
> 	at java.lang.Thread.run(Thread.java:662)
> 	at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(StreamRemoteCall.java:255)
> 	at sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:233)
> 	at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:142)
> 	at org.apache.jackrabbit.rmi.server.ServerXASession_Stub.commit(Unknown Source)
> 	at org.apache.jackrabbit.rmi.client.ClientXASession.commit(ClientXASession.java:74)
> 	at org.objectweb.jotm.SubCoordinator.doCommit(SubCoordinator.java:1123)
> 	at org.objectweb.jotm.SubCoordinator.commit_one_phase(SubCoordinator.java:483)
> 	at org.objectweb.jotm.TransactionImpl.commit(TransactionImpl.java:318)
> 	at org.objectweb.jotm.Current.commit(Current.java:452)
> 	at org.springframework.transaction.jta.JtaTransactionManager.doCommit(JtaTransactionManager.java:1010)
> 	at org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:754)
> 	at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:723)
> 	at org.springframework.transaction.interceptor.TransactionAspectSupport.commitTransactionAfterReturning(TransactionAspectSupport.java:393)
> 	at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:120)
> 	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
> 	at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)
> And the point of the other deadlocks is:
> Thread [executor-13] (Suspended)	
> 	SocketInputStream.socketRead0(FileDescriptor, byte[], int, int, int) line: not available
[native method]	
> 	SocketInputStream.read(byte[], int, int) line: 129	
> 	BufferedInputStream.fill() line: 218	
> 	BufferedInputStream.read() line: 237	
> 	DataInputStream.readByte() line: 248	
> 	StreamRemoteCall.executeCall() line: 195	
> 	UnicastRef.invoke(Remote, Method, Object[], long) line: 142	
> 	ServerXASession_Stub.prepare(Xid) line: not available	
> 	ClientXASession.prepare(Xid) line: 106	
> 	SubCoordinator.doPrepare() line: 829	
> 	SubCoordinator.commit_one_phase() line: 480	
> 	TransactionImpl.commit() line: 318	
> 	Current.commit() line: 452	
> 	JtaTransactionManager.doCommit(DefaultTransactionStatus) line: 1010	
> 	JtaTransactionManager(AbstractPlatformTransactionManager).processCommit(DefaultTransactionStatus)
line: 754	
> 	JtaTransactionManager(AbstractPlatformTransactionManager).commit(TransactionStatus)
line: 723	
> 	TransactionInterceptor(TransactionAspectSupport).commitTransactionAfterReturning(TransactionAspectSupport$TransactionInfo)
line: 393	
> 	TransactionInterceptor.invoke(MethodInvocation) line: 120	
> 	ReflectiveMethodInvocation.proceed() line: 172	
> 	JdkDynamicAopProxy.invoke(Object, Method, Object[]) line: 202	
> 	$Proxy94.processProductDetail(String) line: not available	
> 	ProcessProductDetailConsumer$1.run() line: 79	
> 	ThreadPoolExecutor$Worker.runTask(Runnable) line: 886	
> 	ThreadPoolExecutor$Worker.run() line: 908	
> 	Thread.run() line: 680	

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