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From: "Yongjun Zhang (JIRA)" <jira@apache.org>
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Subject: [jira] [Commented] (HDFS-5939) WebHdfs returns misleading error
 code and logs nothing if trying to create a file with no DNs in cluster
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    [ https://issues.apache.org/jira/browse/HDFS-5939?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13909176#comment-13909176 ] 

Yongjun Zhang commented on HDFS-5939:
-------------------------------------

Uploaded version 006 with the message printing removed. Thanks.



> WebHdfs returns misleading error code and logs nothing if trying to create a file with no DNs in cluster
> --------------------------------------------------------------------------------------------------------
>
>                 Key: HDFS-5939
>                 URL: https://issues.apache.org/jira/browse/HDFS-5939
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: hdfs-client
>    Affects Versions: 2.3.0
>            Reporter: Yongjun Zhang
>            Assignee: Yongjun Zhang
>         Attachments: HDFS-5939.001.patch, HDFS-5939.002.patch, HDFS-5939.003.patch, HDFS-5939.004.patch, HDFS-5939.005.patch, HDFS-5939.006.patch
>
>
> When trying to access hdfs via webhdfs, and when datanode is dead, user will see an exception below without any clue that it's caused by dead datanode:
> $ curl -i -X PUT ".../webhdfs/v1/t1?op=CREATE&user.name=<userName>&overwrite=false"
> ...
> {"RemoteException":{"exception":"IllegalArgumentException","javaClassName":"java.lang.IllegalArgumentException","message":"n must be positive"}}
> Need to fix the report to give user hint about dead datanode.



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