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