[jira] [Commented] (HIVE-6867) Bucketized Table feature fails in some cases
[ https://issues.apache.org/jira/browse/HIVE-6867?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=13969001#comment-13969001 ] Ashutosh Chauhan commented on HIVE-6867: Dupe of HIVE-3077 / HIVE-3244 ? Bucketized Table feature fails in some cases Key: HIVE-6867 URL: https://issues.apache.org/jira/browse/HIVE-6867 Project: Hive Issue Type: Bug Components: HiveServer2 Affects Versions: 0.12.0 Reporter: Laljo John Pullokkaran Assignee: Laljo John Pullokkaran Bucketized Table feature fails in some cases. if src destination is bucketed on same key, and if actual data in the src is not bucketed (because data got loaded using LOAD DATA LOCAL INPATH ) then the data won't be bucketed while writing to destination. Example -- CREATE TABLE P1(key STRING, val STRING) CLUSTERED BY (key) SORTED BY (key) INTO 2 BUCKETS STORED AS TEXTFILE; LOAD DATA LOCAL INPATH '/Users/jp/apache-hive1/data/files/P1.txt' INTO TABLE P1; – perform an insert to make sure there are 2 files INSERT OVERWRITE TABLE P1 select key, val from P1; -- This is not a regression. This has never worked. This got only discovered due to Hadoop2 changes. In Hadoop1, in local mode, number of reducers will always be 1, regardless of what is requested by app. Hadoop2 now honors the number of reducer setting in local mode (by spawning threads). Long term solution seems to be to prevent load data for bucketed table. -- This message was sent by Atlassian JIRA (v6.2#6252)
[jira] [Commented] (HIVE-6867) Bucketized Table feature fails in some cases
[ https://issues.apache.org/jira/browse/HIVE-6867?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=13963472#comment-13963472 ] Laljo John Pullokkaran commented on HIVE-6867: -- BucketingSortingReduceSinkOptimizer removes RS op if src destination is bucketed on same key. Bucketized Table feature fails in some cases Key: HIVE-6867 URL: https://issues.apache.org/jira/browse/HIVE-6867 Project: Hive Issue Type: Bug Components: HiveServer2 Affects Versions: 0.12.0 Reporter: Laljo John Pullokkaran Assignee: Laljo John Pullokkaran Bucketized Table feature fails in some cases. if src destination is bucketed on same key, and if actual data in the src is not bucketed (because data got loaded using LOAD DATA LOCAL INPATH ) then the data won't be bucketed while writing to destination. Example -- CREATE TABLE P1(key STRING, val STRING) CLUSTERED BY (key) SORTED BY (key) INTO 2 BUCKETS STORED AS TEXTFILE; LOAD DATA LOCAL INPATH '/Users/jpullokkaran/apache-hive1/data/files/P1.txt' INTO TABLE P1; – perform an insert to make sure there are 2 files INSERT OVERWRITE TABLE P1 select key, val from P1; -- This is not a regression. This has never worked. This got only discovered due to Hadoop2 changes. In Hadoop1, in local mode, number of reducers will always be 1, regardless of what is requested by app. Hadoop2 now honors the number of reducer setting in local mode (by spawning threads). Long term solution seems to be to prevent load data for bucketed table. -- This message was sent by Atlassian JIRA (v6.2#6252)
