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https://issues.apache.org/jira/browse/HADOOP-12831?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15170905#comment-15170905
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Hudson commented on HADOOP-12831:
---------------------------------

FAILURE: Integrated in Hadoop-trunk-Commit #9383 (See 
[https://builds.apache.org/job/Hadoop-trunk-Commit/9383/])
HADOOP-12831. LocalFS/FSOutputSummer NPEs in constructor if bytes per 
(gtcarrera9: rev 7545ce6636066a05763744a817878e03ee87f456)
* hadoop-common-project/hadoop-common/CHANGES.txt
* 
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/ChecksumFileSystem.java
* 
hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/TestChecksumFileSystem.java


> LocalFS/FSOutputSummer NPEs in constructor if bytes per checksum  set to 0
> --------------------------------------------------------------------------
>
>                 Key: HADOOP-12831
>                 URL: https://issues.apache.org/jira/browse/HADOOP-12831
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: fs
>    Affects Versions: 2.8.0
>            Reporter: Steve Loughran
>            Assignee: Mingliang Liu
>            Priority: Minor
>             Fix For: 2.8.0
>
>         Attachments: HADOOP-12831.000.patch, HADOOP-12831.001.patch, 
> HADOOP-12831.002.patch
>
>
> If you set the number of bytes per checksum to zero, 
> {code}    
> conf.setInt(LocalFileSystemConfigKeys.LOCAL_FS_BYTES_PER_CHECKSUM_KEY, 0)
> {code}
> then create a "file://" instance, you get to see a stack trace



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