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Denys Kuzmenko edited comment on HIVE-20737 at 10/15/18 4:48 PM: ----------------------------------------------------------------- Possible race condition in SparkSession.open() in case of user queries run in parallel within a single session. Double-checked locking should be used in combination with WriteLock. was (Author: dkuzmenko): [~stakiar] Sorry, I just realised that we have only session and maintenance threads. So race condition is not possible. But I think it's better to have check condition inside of the open method to reduce risk of having it called twice. > SparkContext is shared between user sessions and should be closed only when > there is no active one > -------------------------------------------------------------------------------------------------- > > Key: HIVE-20737 > URL: https://issues.apache.org/jira/browse/HIVE-20737 > Project: Hive > Issue Type: Bug > Components: Hive > Reporter: Denys Kuzmenko > Assignee: Denys Kuzmenko > Priority: Major > Attachments: HIVE-20737.1.patch, HIVE-20737.2.patch, > HIVE-20737.5.patch, HIVE-20737.6.patch, HIVE-20737.7.patch > > > 1. SparkContext is shared between user sessions and should be closed only > when there is no active one. > 2. Possible race condition in SparkSession.open() in case of user queries run > in parallel within a single session. -- This message was sent by Atlassian JIRA (v7.6.3#76005)