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From "Tsz Wo (Nicholas), SZE (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-3509) WebHdfsFilesystem does not work within a proxyuser doAs call in secure mode
Date Wed, 06 Jun 2012 00:08:23 GMT

    [ https://issues.apache.org/jira/browse/HDFS-3509?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13289877#comment-13289877
] 

Tsz Wo (Nicholas), SZE commented on HDFS-3509:
----------------------------------------------

There is a try-catch but it catches IOException since the [API of JSON.parse(Reader)|http://jetty.codehaus.org/jetty/jetty-6/apidocs/org/mortbay/util/ajax/JSON.html#parse%28java.io.Reader%29]
said that it throws IOException.  We should change it to catch exception. Good catch!
                
> WebHdfsFilesystem does not work within a proxyuser doAs call in secure mode
> ---------------------------------------------------------------------------
>
>                 Key: HDFS-3509
>                 URL: https://issues.apache.org/jira/browse/HDFS-3509
>             Project: Hadoop HDFS
>          Issue Type: Bug
>    Affects Versions: 2.0.0-alpha
>            Reporter: Alejandro Abdelnur
>            Priority: Critical
>
> It does not find kerberos credentials in the context (the UGI is logged in from a keytab)
and it fails with the following trace:
> {code}
> java.lang.IllegalStateException: unknown char '<'(60) in org.mortbay.util.ajax.JSON$ReaderSource@23245e75
> 	at org.mortbay.util.ajax.JSON.handleUnknown(JSON.java:788)
> 	at org.mortbay.util.ajax.JSON.parse(JSON.java:777)
> 	at org.mortbay.util.ajax.JSON.parse(JSON.java:603)
> 	at org.mortbay.util.ajax.JSON.parse(JSON.java:183)
> 	at org.apache.hadoop.hdfs.web.WebHdfsFileSystem.jsonParse(WebHdfsFileSystem.java:259)
> 	at org.apache.hadoop.hdfs.web.WebHdfsFileSystem.validateResponse(WebHdfsFileSystem.java:268)
> 	at org.apache.hadoop.hdfs.web.WebHdfsFileSystem.run(WebHdfsFileSystem.java:427)
> 	at org.apache.hadoop.hdfs.web.WebHdfsFileSystem.getDelegationToken(WebHdfsFileSystem.java:722)
> {code}

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