Varun Saxena created YARN-3916:
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Summary: DrainDispatcher#await should wait till event has been
completely handled
Key: YARN-3916
URL: https://issues.apache.org/jira/browse/YARN-3916
Project: Hadoop YARN
Issue Type: Bug
Components: resourcemanager
Affects Versions: 2.7.0
Reporter: Varun Saxena
Assignee: Varun Saxena
Priority: Critical
DrainDispatcher#await should wait till event has been completely handled.
Currently it only checks for whether event queue has become empty.
And in many tests we directly check for a state to be changed after calling
await.
Sometimes, the states do not change by the time we check them as event has not
been completely handled.
This is causing test failures such as YARN-3909 and YARN-3910 and may cause
other test failures as well.
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