Jaume M created HIVE-20853:
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Summary: Expose ShuffleHandler.registerDag in the llap daemon API
Key: HIVE-20853
URL: https://issues.apache.org/jira/browse/HIVE-20853
Project: Hive
Issue Type: Improvement
Components: llap
Affects Versions: 3.1.0
Reporter: Jaume M
Currently DAGs are only registered when a submitWork is called for that DAG. At
this point the crendentials are added to the ShuffleHandler and it can start
serving.
However Tez might (and will) schedule tasks to fetch from the ShuffleHandler
before anything of this happens and all this tasks will fail which may results
in the query failing.
This happens in the scenario in which a LlapDaemon just comes up and tez
fetchers try to open a connection before a DAG has been registered.
Adding this API will allow to register the DAG against the Daemon when the AM
notices that a new Daemon is up.
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