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Sandy Ryza commented on SPARK-4921: ----------------------------------- [~xuefuz] [~lirui] was that query against data not in HDFS? If the data is in HDFS, we'd expect NODE_LOCAL, not NO_PREF, right? > Performance issue caused by TaskSetManager returning PROCESS_LOCAL for > NO_PREF tasks > ------------------------------------------------------------------------------------- > > Key: SPARK-4921 > URL: https://issues.apache.org/jira/browse/SPARK-4921 > Project: Spark > Issue Type: Bug > Components: Spark Core > Affects Versions: 1.2.0 > Reporter: Xuefu Zhang > Attachments: NO_PREF.patch > > > During research for HIVE-9153, we found that TaskSetManager returns > PROCESS_LOCAL for NO_PREF tasks, which may caused performance degradation. > Changing the return value to NO_PREF, as demonstrated in the attached patch, > seemingly improves the performance. -- 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