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From "Haohui Mai (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HDFS-4720) Misleading warning message in WebhdfsFileSystem when trying to check whether path exist using webhdfs url
Date Thu, 26 Sep 2013 00:48:03 GMT

     [ https://issues.apache.org/jira/browse/HDFS-4720?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Haohui Mai resolved HDFS-4720.
------------------------------

    Resolution: Duplicate
    
> Misleading warning message in WebhdfsFileSystem when trying to check whether path exist
using webhdfs url
> ---------------------------------------------------------------------------------------------------------
>
>                 Key: HDFS-4720
>                 URL: https://issues.apache.org/jira/browse/HDFS-4720
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: webhdfs
>    Affects Versions: 1.1.1, 1.1.2
>            Reporter: Yu Li
>            Assignee: Yu Li
>            Priority: Minor
>         Attachments: HDFS-4720-trunk.patch
>
>
> When we trying to check whether the target path exists in HDFS through webhdfs, if the
given path to check doesn't exist, we will always observe warning message like:
> ===========================================================
> 13/04/21 04:38:01 WARN web.WebHdfsFileSystem: Original exception is
> org.apache.hadoop.ipc.RemoteException: user = biadmin, proxyUser = null, path = /testWebhdfs
>         at org.apache.hadoop.hdfs.web.JsonUtil.toRemoteException(JsonUtil.java:114)
>         at org.apache.hadoop.hdfs.web.WebHdfsFileSystem.validateResponse(WebHdfsFileSystem.java:294)
>         at org.apache.hadoop.hdfs.web.WebHdfsFileSystem.access$500(WebHdfsFileSystem.java:103)
>         at org.apache.hadoop.hdfs.web.WebHdfsFileSystem$Runner.getResponse(WebHdfsFileSystem.java:552)
>         at org.apache.hadoop.hdfs.web.WebHdfsFileSystem$Runner.run(WebHdfsFileSystem.java:473)
>         at org.apache.hadoop.hdfs.web.WebHdfsFileSystem.run(WebHdfsFileSystem.java:404)
>         at org.apache.hadoop.hdfs.web.WebHdfsFileSystem.getHdfsFileStatus(WebHdfsFileSystem.java:573)
>         at org.apache.hadoop.hdfs.web.WebHdfsFileSystem.getFileStatus(WebHdfsFileSystem.java:584)
>         at org.apache.hadoop.fs.FileSystem.exists(FileSystem.java:768)
> ===========================================================
> while actually FileNotFoundException should be expected when the operation is GETFILESTATUS
and target path doesn't exist. The fact that RemoteException didn't include the real exception
class(FileNotFoundException) in its toString method even make the message more misleading,
since from the message user won't know what the warning is about

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