AngersZhuuuu edited a comment on pull request #31437:
URL: https://github.com/apache/spark/pull/31437#issuecomment-823763714
RM clean preempted container's info, then code in `ClientRMService` throw
`ApplicationAttemptNotFoundException`
```
RMAppAttempt appAttempt = application.getAppAttempts().get(attemptId);
if (appAttempt == null) {
throw new ApplicationAttemptNotFoundException(
"ApplicationAttempt with id '" + attemptId + "' doesn't exist in
RM.");
}
```
`org.apache.spark.deploy.yarn.Client` will receive this exception。
In yarn-client mode, `Client` run in client driver side, when it receive
`ApplicationAttemptNotFoundException`, only means AM's container lose. In this
situation, retry and restart a AM attempt is ok.
In cluster mode, `Client` will be wrapper in `YarnClusterApplication` and
start this in user client side.
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