长时间运行的 Spring Batch 作业中的 TransactionSystemException

Question

我有一个 Spring Batch 作业，有时运行时间超过 2700 秒。当他们这样做时，我注意到来自 spring 批处理框架的异常。

SpringFramework 版本：

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

这里是工作的定义：

<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>

似乎与数据库的连接已用完。

当我轮询需要很长时间的服务时，总是会发生此问题。

如果有任何建议或其他方法，请告诉我！

另请注意，对于运行时间不是很长

如果您需要更多信息，请告诉我。

谢谢， 戴夫

作业的堆栈跟踪：

"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

您的数据库连接将在 45 分钟后断开。您的服务器正在杀死它，或者（更有可能）您的应用程序和数据库之间有防火墙正在杀死长时间打开的持久连接（防火墙通常会切断持久连接，无论它们是否在一段时间后使用时间）。假设它是防火墙，您需要将其配置为不切断连接。