2つのWebsphereノードで実行されているJavaプログラムでは、Websphere Transaction Managerによって管理される分散トランザクションで次の競合シナリオが発生します。トランザクションは、JMS(Websphere-MQ)トランザクションソースとデータベース(Oracle)トランザクションソースにまたがっています。私は理解したいと思いますステージ3コミット処理中にトランザクションがロールバックされたのはなぜですか?
- なぜこの(スレッド2の例外、ステップB6で)例外が発生しましたか? 私は何の問題も起こらないと思った。スレッド2は、トランザクションTX2でT1がロックされていることを確認した後にのみ進行していたので、スレッド1が(トランザクションTX1内で)T1テーブルロックが解放されるのを待っていたのは自然なことです。私は、なぜスレッド2がstage3CommitProcessing例外に遭遇したのでしょうか?例外がそれについての情報を呼吸しないので、どのように私はそれについての詳細を得ることができますか?
- このようなトランザクション関連の競合シナリオをデバッグするにはどうすればよいですか?私はそれが再現するのが難しいかもしれないことを知っています。しかし、私は、Websphere関連のログがいくつかあり、ステージ3でコミットが失敗した原因を調べることができると思いますか?もし誰かが私をその方向に向けることができれば素晴らしいだろう。
- どのように回避/解決できましたか? (WebSphereノードで実行1)
スレッド1
A1: Start TX1
A2: Read messages (maximum of 1000 at a time) from Queue Q1
A3: LOCK TABLE T1 IN EXCLUSIVE MODE
Got exception "ORA-02049": distributed transaction waiting for lock.
Refer Log 1 for stack trace
スレッド2(WebSphereノードで実行中2)
B1: Start TX2
B2: Read messages (maximum of 1000 at a time) from Queue Q1
B3: LOCK TABLE T1 IN EXCLUSIVE MODE
B4: Batch execute
MERGE INTO T1 the messages read
B5: Batch insert messages into T2
B6: Commit TX2
Got JTA transaction unexpectedly rolled back (maybe due to a timeout). Refer Log 2 for stack trace. This was while ***stage3CommitProcessing***.
ログ1:
org.springframework.jdbc.BadSqlGrammarException:StatementCallback。悪いSQL文法[排他モードでのLOCK TABLE T1];ネストされた例外はjava.sql.SQLSyntaxErrorExceptionです:ORA-02049:タイムアウト:ログイン2ロック
at org.springframework.jdbc.support.SQLExceptionSubclassTranslator.doTranslate(SQLExceptionSubclassTranslator.java:94)
at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:72)
at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:80)
at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:406)
at org.springframework.jdbc.core.JdbcTemplate.update(JdbcTemplate.java:518)
at org.springframework.jdbc.core.simple.SimpleJdbcTemplate.update(SimpleJdbcTemplate.java:248)
at com.test.OracleTableLock.processMessage(OracleTableLock.java:52)
at sun.reflect.GeneratedMethodAccessor833.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37)
at java.lang.reflect.Method.invoke(Method.java:600)
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:309)
at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:110)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)
at $Proxy153.receiveMessage(Unknown Source)
at com.test.BatchProcessor.processMessage(BatchProcessor.java:343)
at sun.reflect.GeneratedMethodAccessor779.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37)
at java.lang.reflect.Method.invoke(Method.java:600)
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:309)
at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:110)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)
at $Proxy155.receiveMessage(Unknown Source)
at sun.reflect.GeneratedMethodAccessor778.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37)
at java.lang.reflect.Method.invoke(Method.java:600)
at org.springframework.util.MethodInvoker.invoke(MethodInvoker.java:273)
at org.springframework.scheduling.support.MethodInvokingRunnable.run(MethodInvokingRunnable.java:65)
at org.springframework.scheduling.support.DelegatingErrorHandlingRunnable.run(DelegatingErrorHandlingRunnable.java:51)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:453)
at java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:329)
at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:162)
at org.springframework.scheduling.commonj.TimerManagerTaskScheduler$TimerScheduledFuture.timerExpired(TimerManagerTaskScheduler.java:112)
at com.ibm.ws.asynchbeans.timer.TimerImpl.callListenerMethod(TimerImpl.java:298)
at com.ibm.ws.asynchbeans.timer.GenericTimer.run(GenericTimer.java:216)
at com.ibm.ws.asynchbeans.J2EEContext$RunProxy.run(J2EEContext.java:264)
at java.security.AccessController.doPrivileged(AccessController.java:224)
at javax.security.auth.Subject.doAs(Subject.java:495)
at com.ibm.websphere.security.auth.WSSubject.doAs(WSSubject.java:131)
at com.ibm.websphere.security.auth.WSSubject.doAs(WSSubject.java:89)
at com.ibm.ws.asynchbeans.J2EEContext$DoAsProxy.run(J2EEContext.java:335)
at java.security.AccessController.doPrivileged(AccessController.java:251)
at com.ibm.ws.asynchbeans.J2EEContext.run(J2EEContext.java:1146)
at com.ibm.ws.asynchbeans.timer.TimerImpl.runListenerAsCJWork(TimerImpl.java:425)
at com.ibm.ws.asynchbeans.am._Alarm.fireAlarm(_Alarm.java:333)
at com.ibm.ws.asynchbeans.am._Alarm.run(_Alarm.java:230)
at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1550)
Caused by: java.sql.SQLSyntaxErrorException: ORA-02049: timeout: distributed transaction waiting for lock
at oracle.jdbc.driver.SQLStateMapping.newSQLException(SQLStateMapping.java:91)
at oracle.jdbc.driver.DatabaseError.newSQLException(DatabaseError.java:133)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:206)
at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:455)
at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:413)
at oracle.jdbc.driver.T4C8Oall.receive(T4C8Oall.java:1034)
at oracle.jdbc.driver.T4CStatement.doOall8(T4CStatement.java:183)
at oracle.jdbc.driver.T4CStatement.executeForRows(T4CStatement.java:942)
at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1222)
at oracle.jdbc.driver.OracleStatement.executeUpdateInternal(OracleStatement.java:1706)
at oracle.jdbc.driver.OracleStatement.executeUpdate(OracleStatement.java:1674)
at oracle.jdbc.driver.OracleStatementWrapper.executeUpdate(OracleStatementWrapper.java:275)
at com.ibm.ws.rsadapter.jdbc.WSJdbcStatement.pmiExecuteUpdate(WSJdbcStatement.java:1683)
at com.ibm.ws.rsadapter.jdbc.WSJdbcStatement.executeUpdate(WSJdbcStatement.java:1041)
at org.springframework.jdbc.core.JdbcTemplate$1UpdateStatementCallback.doInStatement(JdbcTemplate.java:508)
at org.springframework.jdbc.core.JdbcTemplate$1UpdateStatementCallback.doInStatement(JdbcTemplate.java:1)
at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:395)
... 50 more
を待っている分散トランザクション:
org.springframework.transaction.UnexpectedRollbackException: JTA transaction unexpectedly rolled back (maybe due to a timeout); nested exception is javax.transaction.RollbackException
at org.springframework.transaction.jta.JtaTransactionManager.doCommit(JtaTransactionManager.java:1012)
at org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:754)
at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:723)
at com.test.BatchProcessor.processMessage(BatchProcessor.java:359)
at sun.reflect.GeneratedMethodAccessor1541.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37)
at java.lang.reflect.Method.invoke(Method.java:600)
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:309)
at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:110)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)
at $Proxy204.receiveMessage(Unknown Source)
at sun.reflect.GeneratedMethodAccessor1540.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37)
at java.lang.reflect.Method.invoke(Method.java:600)
at org.springframework.util.MethodInvoker.invoke(MethodInvoker.java:273)
at org.springframework.scheduling.support.MethodInvokingRunnable.run(MethodInvokingRunnable.java:65)
at org.springframework.scheduling.support.DelegatingErrorHandlingRunnable.run(DelegatingErrorHandlingRunnable.java:51)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:453)
at java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:329)
at java.util.concurrent.FutureTask.runAndReset(FutureTask.java)
at org.springframework.scheduling.commonj.TimerManagerTaskScheduler$TimerScheduledFuture.timerExpired(TimerManagerTaskScheduler.java:112)
at com.ibm.ws.asynchbeans.timer.TimerImpl.callListenerMethod(TimerImpl.java:298)
at com.ibm.ws.asynchbeans.timer.GenericTimer.run(GenericTimer.java:216)
at com.ibm.ws.asynchbeans.J2EEContext$RunProxy.run(J2EEContext.java:264)
at java.security.AccessController.doPrivileged(AccessController.java:224)
at javax.security.auth.Subject.doAs(Subject.java:495)
at com.ibm.websphere.security.auth.WSSubject.doAs(WSSubject.java:131)
at com.ibm.websphere.security.auth.WSSubject.doAs(WSSubject.java:89)
at com.ibm.ws.asynchbeans.J2EEContext$DoAsProxy.run(J2EEContext.java:335)
at java.security.AccessController.doPrivileged(AccessController.java:251)
at com.ibm.ws.asynchbeans.J2EEContext.run(J2EEContext.java:1146)
at com.ibm.ws.asynchbeans.timer.TimerImpl.runListenerAsCJWork(TimerImpl.java:425)
at com.ibm.ws.asynchbeans.am._Alarm.fireAlarm(_Alarm.java:333)
at com.ibm.ws.asynchbeans.am._Alarm.run(_Alarm.java:230)
at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1550)
Caused by: javax.transaction.RollbackException
at com.ibm.tx.jta.TransactionImpl.stage3CommitProcessing(TransactionImpl.java:1217)
at com.ibm.tx.jta.TransactionImpl.processCommit(TransactionImpl.java:991)
at com.ibm.tx.jta.TransactionImpl.commit(TransactionImpl.java:913)
at com.ibm.ws.tx.jta.TranManagerImpl.commit(TranManagerImpl.java:377)
at com.ibm.tx.jta.TranManagerSet.commit(TranManagerSet.java:161)
at com.ibm.ws.tx.jta.UserTransactionImpl.commit(UserTransactionImpl.java:293)
at org.springframework.transaction.jta.JtaTransactionManager.doCommit(JtaTransactionManager.java:1009)
... 37 more