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https://issues.apache.org/jira/browse/HIVE-4838?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13742851#comment-13742851
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Hudson commented on HIVE-4838:
------------------------------
FAILURE: Integrated in Hive-trunk-h0.21 #2273 (See
[https://builds.apache.org/job/Hive-trunk-h0.21/2273/])
HIVE-4838 : Refactor MapJoin HashMap code to improve testability and
readability (Brock Noland via Ashutosh Chauhan) (hashutosh:
http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1514760)
*
/hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/exec/AbstractMapJoinOperator.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/exec/CommonJoinOperator.java
*
/hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/exec/HashTableSinkOperator.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/exec/JoinUtil.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/exec/MapJoinMetaData.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/exec/MapJoinOperator.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/exec/SMBMapJoinOperator.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/exec/mapjoin
*
/hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/exec/mapjoin/MapJoinMemoryExhaustionException.java
*
/hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/exec/mapjoin/MapJoinMemoryExhaustionHandler.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/exec/mr/MapredLocalTask.java
*
/hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/exec/persistence/AbstractMapJoinKey.java
*
/hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/exec/persistence/AbstractMapJoinTableContainer.java
*
/hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/exec/persistence/AbstractRowContainer.java
*
/hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/exec/persistence/DCLLItem.java
*
/hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/exec/persistence/HashMapWrapper.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/exec/persistence/MRU.java
*
/hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/exec/persistence/MapJoinDoubleKeys.java
*
/hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/exec/persistence/MapJoinKey.java
*
/hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/exec/persistence/MapJoinObjectKey.java
*
/hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/exec/persistence/MapJoinObjectSerDeContext.java
*
/hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/exec/persistence/MapJoinObjectValue.java
*
/hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/exec/persistence/MapJoinRowContainer.java
*
/hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/exec/persistence/MapJoinSingleKey.java
*
/hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/exec/persistence/MapJoinTableContainer.java
*
/hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/exec/persistence/MapJoinTableContainerSerDe.java
*
/hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/exec/persistence/RowContainer.java
* /hive/trunk/ql/src/test/org/apache/hadoop/hive/ql/exec/TestHashMapWrapper.java
* /hive/trunk/ql/src/test/org/apache/hadoop/hive/ql/exec/mapjoin
*
/hive/trunk/ql/src/test/org/apache/hadoop/hive/ql/exec/mapjoin/TestMapJoinMemoryExhaustionHandler.java
*
/hive/trunk/ql/src/test/org/apache/hadoop/hive/ql/exec/persistence/TestMapJoinEqualityTableContainer.java
*
/hive/trunk/ql/src/test/org/apache/hadoop/hive/ql/exec/persistence/TestMapJoinKey.java
*
/hive/trunk/ql/src/test/org/apache/hadoop/hive/ql/exec/persistence/TestMapJoinKeys.java
*
/hive/trunk/ql/src/test/org/apache/hadoop/hive/ql/exec/persistence/TestMapJoinRowContainer.java
*
/hive/trunk/ql/src/test/org/apache/hadoop/hive/ql/exec/persistence/TestMapJoinTableContainer.java
*
/hive/trunk/ql/src/test/org/apache/hadoop/hive/ql/exec/persistence/Utilities.java
> Refactor MapJoin HashMap code to improve testability and readability
> --------------------------------------------------------------------
>
> Key: HIVE-4838
> URL: https://issues.apache.org/jira/browse/HIVE-4838
> Project: Hive
> Issue Type: Bug
> Reporter: Brock Noland
> Assignee: Brock Noland
> Fix For: 0.12.0
>
> Attachments: HIVE-4838.patch, HIVE-4838.patch, HIVE-4838.patch,
> HIVE-4838.patch, HIVE-4838.patch, HIVE-4838.patch, HIVE-4838.patch
>
>
> MapJoin is an essential component for high performance joins in Hive and the
> current code has done great service for many years. However, the code is
> showing it's age and currently suffers from the following issues:
> * Uses static state via the MapJoinMetaData class to pass serialization
> metadata to the Key, Row classes.
> * The api of a logical "Table Container" is not defined and therefore it's
> unclear what apis HashMapWrapper
> needs to publicize. Additionally HashMapWrapper has many used public methods.
> * HashMapWrapper contains logic to serialize, test memory bounds, and
> implement the table container. Ideally these logical units could be seperated
> * HashTableSinkObjectCtx has unused fields and unused methods
> * CommonJoinOperator and children use ArrayList on left hand side when only
> List is required
> * There are unused classes MRU, DCLLItemm and classes which duplicate
> functionality MapJoinSingleKey and MapJoinDoubleKeys
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