Yuliya Feldman created TWILL-202:
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Summary: TwillAppMaster should not wait indefinitely for resources
in case of changeInstance() request
Key: TWILL-202
URL: https://issues.apache.org/jira/browse/TWILL-202
Project: Apache Twill
Issue Type: Improvement
Components: core, zookeeper
Reporter: Yuliya Feldman
changeInstances() in it's core creates sequential znode that TwillAppMaster
processes in order and until current;y processed request is not satisfied rest
of the changeInstances() requests will be sitting not processed.
The problem comes up if user made unreasonable changeInstances() request that
will be never satisfied with current YARN capacity. User could have mistyped
something.
I suggest to at least put a limit on waiting time for resources to check if
there are more requests pending in line to abandon current one and proceed to
next.
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