[ https://issues.apache.org/jira/browse/SPARK-6507?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Cheng Lian updated SPARK-6507: ------------------------------ Shepherd: Cheng Lian > Create separate Hive Driver instance for each SQL query in HiveThriftServer2 > ---------------------------------------------------------------------------- > > Key: SPARK-6507 > URL: https://issues.apache.org/jira/browse/SPARK-6507 > Project: Spark > Issue Type: Bug > Components: SQL > Affects Versions: 1.0.2, 1.1.1, 1.2.1, 1.3.0 > Reporter: Cheng Lian > > In the current implementation of HiveThriftServer2, Hive {{Driver}} instances > are cached and reused among queries. However, {{Driver}} is not thread-safe, > and may cause racing conditions. In SPARK-4908, we synchronized > {{HiveContext.runHive}} to avoid this issue, but this affects concurrency > negatively, because no two native commands can be executed concurrently. This > is pretty bad for heavy commands like ANALYZE. > Please refer [this > comment|https://issues.apache.org/jira/browse/SPARK-4908?focusedCommentId=14264469&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14264469] > in SPARK-4908 for details. -- This message was sent by Atlassian JIRA (v6.3.4#6332) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org