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From "Micah Whitacre (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CRUNCH-626) HBaseSourceTarget Binary compatibility across HBase versions
Date Thu, 01 Dec 2016 13:08:58 GMT

    [ https://issues.apache.org/jira/browse/CRUNCH-626?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15711923#comment-15711923
] 

Micah Whitacre commented on CRUNCH-626:
---------------------------------------

Yeah with the HBase, Spark, Scala changes, we probably need to develop a strategy for versioning
and compatibility between them.

> HBaseSourceTarget Binary compatibility across HBase versions
> ------------------------------------------------------------
>
>                 Key: CRUNCH-626
>                 URL: https://issues.apache.org/jira/browse/CRUNCH-626
>             Project: Crunch
>          Issue Type: Improvement
>          Components: IO
>            Reporter: Micah Whitacre
>            Assignee: Micah Whitacre
>         Attachments: CRUNCH-626.patch
>
>
> Currently Crunch targets HBase 1.0.   Certain vendors however are trying to maintain
API compatibility with HBase 0.96, 0.98, 1.0, and all 1.x.  
> While the API compatibility is ok across these versions, it was however not binary compatible
as HBase changed the method signature from returning void[1] to returning OperationWithAttributes[1]
(and in later versions Scan).
> This results in an exception like the following, when you try to use the latest Crunch
0.14 release against that vendor's distribution of HBase which we should be theoretically
compatible with.
> {noformat}
> java.lang.NoSuchMethodError: org.apache.hadoop.hbase.client.Scan.setAttribute(Ljava/lang/String;[B)Lorg/apache/hadoop/hbase/client/Scan;
> at org.apache.crunch.io.hbase.HBaseSourceTarget.<init>(HBaseSourceTarget.java:112)
> at org.apache.crunch.io.hbase.HBaseSourceTarget.<init>(HBaseSourceTarget.java:96)
> at org.apache.crunch.io.hbase.HBaseSourceTarget.<init>(HBaseSourceTarget.java:88)
> {noformat}
> [1] - https://github.com/apache/hbase/blob/rel/0.98.0/hbase-client/src/main/java/org/apache/hadoop/hbase/client/OperationWithAttributes.java#L40
> [2] - https://github.com/apache/hbase/blob/rel/1.0.0/hbase-client/src/main/java/org/apache/hadoop/hbase/client/OperationWithAttributes.java#L41



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