Rajesh Balamohan created TEZ-4090:
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Summary: TezIDCache::getInstance sync lock
Key: TEZ-4090
URL: https://issues.apache.org/jira/browse/TEZ-4090
Project: Apache Tez
Issue Type: Bug
Reporter: Rajesh Balamohan
Attachments: tez-task-id-concurrency.png
profiler output shared by [~gopalv].
Looking at the code, it is not mandatory to have sync on getInstance.
https://github.com/apache/tez/blob/master/tez-common/src/main/java/org/apache/tez/dag/records/TezID.java#L48
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