Jaume M created TEZ-3981:
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Summary: UnorderedPartitionedKVWriter.getInitialMemoryRequirement
may return negative memory
Key: TEZ-3981
URL: https://issues.apache.org/jira/browse/TEZ-3981
Project: Apache Tez
Issue Type: Bug
Affects Versions: 0.9.1
Reporter: Jaume M
The reason for this is because
[here|https://github.com/apache/tez/blob/4b9a7be1b98cff00c44e7d3ffb2486bb59ca6804/tez-runtime-library/src/main/java/org/apache/tez/runtime/library/common/writers/UnorderedPartitionedKVWriter.java#L678]
first we shift the int, and then we assign it to the long, therefore if the
int is bigger than {{2^12}} when shifting {{20}} it becomes a negative value.
We should cast to long and then do the shift.
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