[ https://issues.apache.org/jira/browse/HDFS-3509?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Alejandro Abdelnur updated HDFS-3509:
-------------------------------------

    Attachment: HDFS-3509.patch

same solution as the private filesystem impl in httpfs. this patch requires HDFS-3113 (and dep JIRAs), not for the fix itself but for the testcases, httpfs is fully testing proxyuser stuff and kerberos.
                
> 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
>            Assignee: Alejandro Abdelnur
>            Priority: Critical
>         Attachments: HDFS-3509.patch
>
>
> 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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