Jason Lowe created TEZ-3296:
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Summary: Tez job can hang if two vertices at the same root
distance have different task requirements
Key: TEZ-3296
URL: https://issues.apache.org/jira/browse/TEZ-3296
Project: Apache Tez
Issue Type: Bug
Affects Versions: 0.7.1
Reporter: Jason Lowe
Priority: Critical
When two vertices have the same distance from the root Tez will schedule
containers with the same priority. However those vertices could have different
task requirements and therefore different capabilities. As documented in
YARN-314, YARN currently doesn't support requests for multiple sizes at the
same priority. In practice this leads to one vertex allocation requests
clobbering the other, and that can result in a situation where the Tez AM is
waiting on containers it will never receive from the RM.
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