[ 
https://issues.apache.org/jira/browse/FLINK-14717?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

lining updated FLINK-14717:
---------------------------
    Description: 
*Current*

The job's exceptions just show current attempt’s exceptions in web UI.(ps: 
[code|https://github.com/apache/flink/blob/34b5399f4effb679baabd8bca312cbf92ec34165/flink-runtime/src/main/java/org/apache/flink/runtime/rest/handler/job/JobExceptionsHandler.java#L97-L98])

If the job failovers, we couldn't see any prior attempts' exceptions.

*Proposal*

We could use executionVertex.getPriorExecutionAttempt to get prior attempt in 
JobExceptionsHandler.
{code:java}
for (int i = task.getAttemptNumber() - 1; i >= 0; i--) {
  task = executionVertex.getPriorExecutionAttempt(i);
}
{code}

  was:
*Current*

The job's exceptions just show current attempt’s exceptions in web UI.(ps: 
[code|https://github.com/apache/flink/blob/34b5399f4effb679baabd8bca312cbf92ec34165/flink-runtime/src/main/java/org/apache/flink/runtime/rest/handler/job/JobExceptionsHandler.java#L97-L98

If the job failovers, we couldn't see any prior attempts' exceptions.

*Proposal*

We could use executionVertex.getPriorExecutionAttempt to get prior attempt in 
JobExceptionsHandler.
{code:java}
for (int i = task.getAttemptNumber() - 1; i >= 0; i--) {
  task = executionVertex.getPriorExecutionAttempt(i);
}
{code}


> JobExceptionsHandler show exceptions of prior  attempts 
> --------------------------------------------------------
>
>                 Key: FLINK-14717
>                 URL: https://issues.apache.org/jira/browse/FLINK-14717
>             Project: Flink
>          Issue Type: Sub-task
>          Components: Runtime / Web Frontend
>            Reporter: lining
>            Priority: Major
>
> *Current*
> The job's exceptions just show current attempt’s exceptions in web UI.(ps: 
> [code|https://github.com/apache/flink/blob/34b5399f4effb679baabd8bca312cbf92ec34165/flink-runtime/src/main/java/org/apache/flink/runtime/rest/handler/job/JobExceptionsHandler.java#L97-L98])
> If the job failovers, we couldn't see any prior attempts' exceptions.
> *Proposal*
> We could use executionVertex.getPriorExecutionAttempt to get prior attempt in 
> JobExceptionsHandler.
> {code:java}
> for (int i = task.getAttemptNumber() - 1; i >= 0; i--) {
>   task = executionVertex.getPriorExecutionAttempt(i);
> }
> {code}



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