当步骤失败时，Spring批处理将抛出UNKNOWN退出状态

Question

我使用Spring批处理分区技术来处理块中的记录。我有一个控制器来启动作业和分区程序，以便在40个线程之间平均分配记录。由于我们已经实现了分页并在我们的项目中使用JPA，这就是我们使用JPAPagingItemReader的原因。 writer类正在实现ItemWriter。有人可以帮我解决这个问题吗

org.springframework.batch.core.step.FatalStepExecutionException: JobRepository failure forcing rollback
    at org.springframework.batch.core.step.tasklet.TaskletStep$ChunkTransactionCallback.doInTransaction(TaskletStep.java:459)
    at org.springframework.batch.costrong textre.step.tasklet.TaskletStep$ChunkTransactionCallback.doInTransaction(TaskletStep.java:330)
    at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:133)
    at org.springframework.batch.core.step.tasklet.TaskletStep$2.doInChunkContext(TaskletStep.java:271)
    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:257)
    at org.springframework.batch.core.step.AbstractStep.execute(AbstractStep.java:198)
    at org.springframework.batch.core.partition.support.TaskExecutorPartitionHandler$1.call(TaskExecutorPartitionHandler.java:139)
    at org.springframework.batch.core.partition.support.TaskExecutorPartitionHandler$1.call(TaskExecutorPartitionHandler.java:136)
    at java.util.concurrent.FutureTask.run(FutureTask.java:262)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at java.lang.Thread.run(Thread.java:744)
Caused by: java.util.ConcurrentModificationException
    at java.util.HashMap$HashIterator.nextEntry(HashMap.java:926)
    at java.util.HashMap$KeyIterator.next(HashMap.java:960)
    at com.thoughtworks.xstream.converters.collections.CollectionConverter.marshal(CollectionConverter.java:73)
    at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:69)
    at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:58)
    at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:43)
    at com.thoughtworks.xstream.core.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:88)
    at com.thoughtworks.xstream.converters.collections.AbstractCollectionConverter.writeItem(AbstractCollectionConverter.java"

作业report.xml将

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:batch="http://www.springframework.org/schema/batch" 
    xmlns:util="http://www.springframework.org/schema/util"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://www.springframework.org/schema/batch 
    http://www.springframework.org/schema/batch/spring-batch-2.2.xsd
    http://www.springframework.org/schema/beans 
    http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
    http://www.springframework.org/schema/util 
    http://www.springframework.org/schema/util/spring-util-3.2.xsd">

    <job id="testChunkJob" xmlns="http://www.springframework.org/schema/batch">
        <step id="testMasterStep">
            <partition step="testSlaveStep" partitioner="testPartitioner">
                <handler grid-size="40" task-executor="multiThreadedTaskExecutor" />
            </partition>
        </step>
        <batch:listeners>
            <batch:listener ref="baseJobListener" />            
        </batch:listeners>      
    </job>

    <step id="testSlaveStep" xmlns="http://www.springframework.org/schema/batch">
        <tasklet>
            <chunk reader="testChunkReader" processor="testChunkProcessor" writer="testChunkWriter" commit-interval="50" />
            <batch:listeners>
                <listener ref="baseItemListener" />
            </batch:listeners>
        </tasklet>
        <listeners>
            <listener ref="baseStepListener" />
        </listeners>
    </step>

    <bean id="multiThreadedTaskExecutor" class="org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor">
        <property name="corePoolSize" value="40" />
        <property name="maxPoolSize" value="40" />
        <property name="allowCoreThreadTimeOut" value="true" />
    </bean>


    <bean id="baseJobListener" class="com.test.batch.listener.BaseJobListener" />

    <bean id="baseItemListener" class="com.test.batch.listener.BaseItemListener" />

    <bean id="baseStepListener" class="com.test.batch.listener.BaseStepListener" />

    <bean id="testPartitioner" class="com.test.batch.partitioner.TestPartitioner"/>

    <bean id="testChunkReader"
        class="com.test.batch.reader.TestChunkReader" scope="step">
        <property name="minValue" value="#{stepExecutionContext[minValue]}" />
        <property name="maxValue" value="#{stepExecutionContext[maxValue]}" />
        <property name="gtfContext" value="#{stepExecutionContext[gtfContext]}" />
        <property name="entityManagerFactory" ref="entityManagerFactory" />
        <property name="pageSize" value="40" />
    </bean>

    <bean id="testChunkProcessor" class="com.test.batch.processing.TestChunkProcessor" scope="step"/>       

    <bean id="testChunkWriter" class="com.test.batch.writer.TestChunkWriter" scope="step"/>         
</beans>