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Sergey Shelukhin commented on HIVE-19813: ----------------------------------------- +1. Could also be atomicboolean? > SessionState.start don't have to be synchronized > ------------------------------------------------ > > Key: HIVE-19813 > URL: https://issues.apache.org/jira/browse/HIVE-19813 > Project: Hive > Issue Type: Bug > Reporter: Daniel Dai > Assignee: Daniel Dai > Priority: Major > Attachments: HIVE-19813.1.patch > > > This is introduced in HIVE-14690. However, only check-set block needs to be > synchronized, not the whole block. The method will start Tez AM, which is a > long operation. Make the method synchronized will serialize session start > thus slow down hs2. -- This message was sent by Atlassian JIRA (v7.6.3#76005)