長時間運行彈簧批量作業中的TransactionSystemException

Question

我有一個彈簧批量作業，有時運行時間超過2700秒。當他們這樣做時，我注意到來自Spring批處理框架的異常。

springframework的版本：

<spring-batch.version>2.2.7.RELEASE</spring-batch.version> 
<spring.framework.version>4.0.3.RELEASE</spring.framework.version> 

這裏是工作的定義：

<batch:job id="MyJob"> 
    <batch:step id="trigger-job" next="poll-job"> 
     <batch:tasklet ref="triggerJobStep" /> 
     <batch:listeners> 
      <batch:listener ref="phaseStepListener" /> 
     </batch:listeners> 
    </batch:step> 
    <batch:step id="poll-job"> 
     <batch:tasklet ref="pollJobStatusStep" /> 
     <batch:listeners> 
      <batch:listener ref="phaseStepListener" /> 
     </batch:listeners> 
    </batch:step> 

    <batch:listeners> 
     <batch:listener ref="phaseCompletionListener" /> 
    </batch:listeners> 
</batch:job> 

好像連接到數據庫已經不多了。

這個問題總是發生在我輪詢一個需要很長時間的服務時。

如果有任何建議或其他方法，請讓我知道！

另外請注意，對於那些運行時間不長的工作，這是沒有問題的。

如果您需要更多信息，請讓我知道。

謝謝， 戴夫

工作的堆棧跟蹤：45分鐘後

"errorMessage":"Step requested termination: StepExecution: id=15365, version=2, name=poll-cmpaas-deploy, status=UNKNOWN, exitStatus=FAILED, readCount=0, filterCount=0, writeCount=0 readSkipCount=0, writeSkipCount=0, processSkipCount=0, commitCount=0, rollbackCount=1, 
exitDescription=org.springframework.transaction.TransactionSystemException: Could not roll back JPA transaction; nested exception is javax.persistence.PersistenceException: unexpected error when rollbacking 
    at org.springframework.orm.jpa.JpaTransactionManager.doRollback(JpaTransactionManager.java:546) 
    at org.springframework.transaction.support.AbstractPlatformTransactionManager.processRollback(AbstractPlatformTransactionManager.java:849) 
    at org.springframework.transaction.support.AbstractPlatformTransactionManager.rollback(AbstractPlatformTransactionManager.java:826) 
    at org.springframework.transaction.support.TransactionTemplate.rollbackOnException(TransactionTemplate.java:164) 
    at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:137) 
    at org.springframework.batch.core.step.tasklet.TaskletStep$2.doInChunkContext(TaskletStep.java:267) 
    at org.springframework.batch.core.scope.context.StepContextRepeatCallback.doInIteration(StepContextRepeatCallback.java:77) 
    at org.springframework.batch.repeat.support.RepeatTemplate.getNextResult(RepeatTemplate.java:368) 
    at org.springframework.batch.repeat.support.RepeatTemplate.executeInternal(RepeatTemplate.java:215) 
    at org.springframework.batch.repeat.support.RepeatTemplate.iterate(RepeatTemplate.java:144) 
    at org.springframework.batch.core.step.tasklet.TaskletStep.doExecute(TaskletStep.java:253) 
    at org.springframework.batch.core.step.AbstractStep.execute(AbstractStep.java:195) 
    at org.springframework.batch.core.job.SimpleStepHandler.handleStep(SimpleStepHandler.java:141) 
    at org.springframework.batch.core.job.flow.JobFlowExecutor.executeStep(JobFlowExecutor.java:64) 
    at org.springframework.batch.core.job.flow.support.state.StepState.handle(StepState.java:60) 
    at org.springframework.batch.core.job.flow.support.SimpleFlow.resume(SimpleFlow.java:151) 
    at org.springframework.batch.core.job.flow.support.SimpleFlow.start(SimpleFlow.java:130) 
    at org.springframework.batch.core.job.flow.FlowJob.doExecute(FlowJob.java:135) 
    at org.springframework.batch.core.job.AbstractJob.execute(AbstractJob.java:301) 
    at org.springframework.batch.core.launch.support.SimpleJobLauncher$1.run(SimpleJobLauncher.java:134) 
    at java.lang.Thread.run(Unknown Source) 
Caused by: javax.persistence.PersistenceException: unexpected error when rollbacking 
    at org.hibernate.jpa.internal.TransactionImpl.rollback(TransactionImpl.java:111) 
    at org.springframework.orm.jpa.JpaTransactionManager.doRollback(JpaTransactionManager.java:542) 
    ... 20 more 
Caused by: org.hibernate.TransactionException: rollback failed 
    at org.hibernate.engine.transaction.spi.AbstractTransactionImpl.rollback(AbstractTransactionImpl.java:217) 
    at org.hibernate.jpa.internal.TransactionImpl.rollback(TransactionImpl.java:108) 
    ... 21 more 
Caused by: org.hibernate.TransactionException: unable to rollback against JDBC connection 
    at org.hibernate.engine.transaction.internal.jdbc.JdbcTransaction.doRollback(JdbcTransaction.java:167) 
    at org.hibernate.engine.transaction.spi.AbstractTransactionImpl.rollback(AbstractTransactionImpl.java:211) 
    ... 22 more 
Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Communications link failure during rollback(). Transaction resolution unknown. 
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) 
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source) 
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) 
    at java.lang.reflect.Constructor.newInstance(Unknown Source) 
    at com.mysql.jdbc.Util.handleNewInstance(Util.java:411) 
    at com.mysql.jdbc.Util.getInstance(Util.java:386) 
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1015) 
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:989) 
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:975) 
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:920) 
    at com.mysql.jdbc.ConnectionImpl.rollback(ConnectionImpl.java:5101) 
    at com.mchange.v2.c3p0.impl.NewProxyConnection.rollback(NewProxyConnection.java:860) 
    at org.hibernate.engine.transaction.internal.jdbc.JdbcTransaction.doRollback(JdbcTransaction.java:163) 
    ... 23 more 
Could not roll back JPA transaction; nested exception is javax.persistence.PersistenceException: unexpected error when rollbacking","warningMessage":null,"data":null}' 

Answer 1

你的數據庫連接被切斷。無論是你的服務器正在殺死它，或者（更可能）你的應用程序和數據庫之間有一個防火牆，它正在殺死長時間持續連接（防火牆通常會切斷持久連接，無論它們在一段時間後都處於使用狀態的時間）。假設它是一個防火牆，您需要將其配置爲不切斷連接。