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From "Matt McCline (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-9824) LLAP: Native Vectorization of Map Join so previously CPU bound queries shift their bottleneck to I/O and make it possible for the rest of LLAP to shine ;)
Date Fri, 17 Apr 2015 12:51:00 GMT

    [ https://issues.apache.org/jira/browse/HIVE-9824?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14499765#comment-14499765
] 

Matt McCline commented on HIVE-9824:
------------------------------------

Well, add to the mystery, when I run that query with vectorization on and on MR (i.e. no native
vector map join since we only do Tez), I get the following exception!

{noformat}
Caused by: java.lang.reflect.InvocationTargetException
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
	at org.apache.hadoop.hive.ql.exec.OperatorFactory.getVectorOperator(OperatorFactory.java:159)
	... 58 more
Caused by: org.apache.hadoop.hive.ql.metadata.HiveException: org.apache.hadoop.hive.ql.metadata.HiveException:
java.lang.NullPointerException
	at org.apache.hadoop.hive.ql.exec.vector.VectorizationContext.createVectorExpression(VectorizationContext.java:1037)
	at org.apache.hadoop.hive.ql.exec.vector.VectorizationContext.getVectorExpressionForUdf(VectorizationContext.java:995)
	at org.apache.hadoop.hive.ql.exec.vector.VectorizationContext.getGenericUdfVectorExpression(VectorizationContext.java:1162)
	at org.apache.hadoop.hive.ql.exec.vector.VectorizationContext.getVectorExpression(VectorizationContext.java:440)
	at org.apache.hadoop.hive.ql.exec.vector.VectorFilterOperator.<init>(VectorFilterOperator.java:54)
	... 63 more
Caused by: org.apache.hadoop.hive.ql.metadata.HiveException: java.lang.NullPointerException
	at org.apache.hadoop.hive.ql.exec.vector.VectorizationContext.createVectorExpression(VectorizationContext.java:1037)
	at org.apache.hadoop.hive.ql.exec.vector.VectorizationContext.getVectorExpressionForUdf(VectorizationContext.java:995)
	at org.apache.hadoop.hive.ql.exec.vector.VectorizationContext.getGenericUdfVectorExpression(VectorizationContext.java:1162)
	at org.apache.hadoop.hive.ql.exec.vector.VectorizationContext.getVectorExpression(VectorizationContext.java:440)
	at org.apache.hadoop.hive.ql.exec.vector.VectorizationContext.createVectorExpression(VectorizationContext.java:1013)
	... 67 more
Caused by: java.lang.NullPointerException
	at org.apache.hadoop.hive.ql.exec.vector.VectorizationContext.getInputColumnIndex(VectorizationContext.java:290)
	at org.apache.hadoop.hive.ql.exec.vector.VectorizationContext.createVectorExpression(VectorizationContext.java:1017)
	... 71 more
{noformat}

> LLAP: Native Vectorization of Map Join so previously CPU bound queries shift their bottleneck
to I/O and make it possible for the rest of LLAP to shine ;)
> ----------------------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: HIVE-9824
>                 URL: https://issues.apache.org/jira/browse/HIVE-9824
>             Project: Hive
>          Issue Type: Sub-task
>            Reporter: Matt McCline
>            Assignee: Matt McCline
>            Priority: Critical
>         Attachments: HIVE-9824.01.patch, HIVE-9824.02.patch
>
>
> Today's VectorMapJoinOperator is a pass-through that converts each row from a vectorized
row batch in a Java Object[] row and passes it to the MapJoinOperator superclass.
> This enhancement creates specialized vectorized map join operator classes that are optimized.



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