Varun Saxena created YARN-3986:
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Summary: getTransferredContainers in AbstractYarnScheduler should
be present in YarnScheduler interface instead
Key: YARN-3986
URL: https://issues.apache.org/jira/browse/YARN-3986
Project: Hadoop YARN
Issue Type: Bug
Components: scheduler
Affects Versions: 2.7.0
Reporter: Varun Saxena
Assignee: Varun Saxena
Currently getTransferredContainers is present in {{AbstractYarnScheduler}}.
But in ApplicationMasterService, while registering AM, we are calling this
method by typecasting it to AbstractYarnScheduler, which is incorrect.
This method should be moved to YarnScheduler.
Because if a custom scheduler is to be added, it will implement YarnScheduler,
not AbstractYarnScheduler.
As ApplicationMasterService is calling getTransferredContainers by typecasting
it to AbstractYarnScheduler, it is imposing an indirect dependency on
AbstractYarnScheduler for any pluggable custom scheduler.
We can move the method to YarnScheduler and leave the definition in
AbstractYarnScheduler as it is.
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