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https://issues.apache.org/jira/browse/HBASE-19968?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16361024#comment-16361024
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Ted Yu commented on HBASE-19968:
--------------------------------

bq. Shall I file an issue to fix the comment

Go ahead.

> MapReduce test fails with NoClassDefFoundError against hadoop3
> --------------------------------------------------------------
>
>                 Key: HBASE-19968
>                 URL: https://issues.apache.org/jira/browse/HBASE-19968
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Ted Yu
>            Assignee: Ted Yu
>            Priority: Major
>         Attachments: 19968.v1.txt
>
>
> When running mapreduce tests against hadoop3, I observed the following:
> {code}
> [ERROR] 
> testWithMockedMapReduceSingleRegion(org.apache.hadoop.hbase.mapred.TestTableSnapshotInputFormat)
>   Time elapsed: 0.024 s  <<< ERROR!
> java.lang.NoClassDefFoundError: 
> org/apache/hadoop/hdfs/server/blockmanagement/BlockInfo
>   at 
> org.apache.hadoop.hbase.mapred.TestTableSnapshotInputFormat.testWithMockedMapReduce(TestTableSnapshotInputFormat.java:178)
> Caused by: java.lang.ClassNotFoundException: 
> org.apache.hadoop.hdfs.server.blockmanagement.BlockInfo
>   at 
> org.apache.hadoop.hbase.mapred.TestTableSnapshotInputFormat.testWithMockedMapReduce(TestTableSnapshotInputFormat.java:178)
> {code}
> This was due to lack of dependency on hadoop-hdfs module in the hadoop-3.0 
> profile of hbase-mapreduce/pom.xml



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