Wilfred Spiegelenburg created YARN-9984:
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Summary: FSPreemptionThread crash with NullPointerException
Key: YARN-9984
URL: https://issues.apache.org/jira/browse/YARN-9984
Project: Hadoop YARN
Issue Type: Bug
Components: fairscheduler
Affects Versions: 3.0.0
Reporter: Wilfred Spiegelenburg
Assignee: Wilfred Spiegelenburg
When an application is unregistered there is a chance that there are still
containers running on a node for that application. In all cases we handle the
application missing from the RM gracefully (log a message and continue) except
for the FS pre-emption thread.
In case the application is removed but some containers are still linked to a
node the FSPreemptionThread will crash with a NPE when it tries to retrieve the
application id for the attempt:
{code:java}
FSAppAttempt app =
scheduler.getSchedulerApp(container.getApplicationAttemptId());
ApplicationId appId = app.getApplicationId();{code}
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