Panagiotis Garefalakis created TEZ-4213:
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Summary: Bound appContext executor capacity using a configurable
property
Key: TEZ-4213
URL: https://issues.apache.org/jira/browse/TEZ-4213
Project: Apache Tez
Issue Type: Bug
Reporter: Panagiotis Garefalakis
Assignee: Panagiotis Garefalakis
After TEZ-4170 was merged, appContext executor pool is also used by the
RootInputInitializerManager to speed up SplitGeneration.
However, this executor pool currently has not capacity limit
https://github.com/apache/tez/blob/master/tez-dag/src/main/java/org/apache/tez/dag/app/DAGAppMaster.java#L624
When generating splits for larger inputs (thousands or more) this could result
in
{color:red}java.lang.OutOfMemoryError: unable to create new native thread{color}
(reproducible with a test case)
I propose to limit the capacity of this pool to a configurable value that can
be for example the number of physical cores by default.
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