Daryn Sharp created HADOOP-9747:
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Summary: Reduce unnecessary UGI synchronization
Key: HADOOP-9747
URL: https://issues.apache.org/jira/browse/HADOOP-9747
Project: Hadoop Common
Issue Type: Bug
Components: security
Affects Versions: 2.0.0-alpha, 0.23.0, 3.0.0
Reporter: Daryn Sharp
Assignee: Daryn Sharp
Priority: Critical
Jstacks of heavily loaded NNs show up to dozens of threads blocking in the UGI.
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