Spring Batch决策器无法正常工作

Question

我必须根据decider的响应执行一个tasklet。下面的代码片段。

COMLPETED场景运作良好。但是，FAILED场景无效。有什么建议。感谢

public FlowExecutionStatus decide(JobExecution jobExecution,
        StepExecution stepExecution) 
{
    LOGGER.info("Entering Decider");
    if(stepExecution.getExitStatus().equals(ExitStatus.FAILED))
    {
        LOGGER.info("Exit Status Failed");
        return  FlowExecutionStatus.FAILED;
    }
    return FlowExecutionStatus.COMPLETED;
    // TODO Auto-generated method stub
}

<batch:decision decider="fileCopyDecider" id="fileCopyDecider">
        <batch:next on="FAILED" to="FailureFolder"/>
        <batch:next on="COMPLETED" to="SuccessFolder"/> 
    </batch:decision>
<batch:step id ="SuccessFolder">
<batch:tasklet ref="filecopyTaskletOnSuccess"></batch:tasklet>
</batch:step>
<batch:step id ="FailureFolder">
<batch:tasklet ref="filecopyTaskletOnFailure"></batch:tasklet>
</batch:step>