Details
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Bug
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Status: Open
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Minor
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Resolution: Unresolved
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2.7.0
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None
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None
Description
If an AM wants to reconfigure itself or restart with new resources, there's no way to do this without the active participation of a client.
It can call System.exit and rely on YARN to restart it -but that counts as a failure and may lose the entire app. furthermore, that doesn't allow the AM to resize itself.
A simple exit-code to be interpreted as restart-without-failure could handle the first case; an explicit call to indicate restart, including potentially new resource/label requirements, could be more reliabile, and certainly more flexible.