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https://issues.apache.org/jira/browse/HADOOP-1298?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12525593
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Raghu Angadi commented on HADOOP-1298:
--------------------------------------
'Browse Directory' results in an NPE :
Simple cluster with one datanode. Started from scratch. added one file with
copyFromLocal. went to namenode:50070/ and clicked on the datanode link :
We page shows this :
{noformat}
HTTP ERROR: 500
java.io.IOException: java.lang.NullPointerException
at org.apache.hadoop.dfs.NameNode.isDir(NameNode.java:437)
at org.apache.hadoop.dfs.NameNode$12.run(NameNode.java:1070)
at org.apache.hadoop.dfs.NameNode$12.run(NameNode.java:1068)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAsPrivileged(Subject.java:517)
at org.apache.hadoop.dfs.NameNode.doAsSubject(NameNode.java:917)
at org.apache.hadoop.dfs.NameNode.isDir(NameNode.java:1068)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:341)
at org.apache.hadoop.ipc.Server$Handler.run(Server.java:566)
RequestURI=/browseDirectory.jsp
{noformat}
> adding user info to file
> ------------------------
>
> Key: HADOOP-1298
> URL: https://issues.apache.org/jira/browse/HADOOP-1298
> Project: Hadoop
> Issue Type: New Feature
> Components: dfs, fs
> Reporter: Kurtis Heimerl
> Assignee: Christophe Taton
> Fix For: 0.15.0
>
> Attachments: 1298_2007-09-05g.patch, 1298_2007-09-06a.patch,
> hadoop-user-munncha.patch17
>
>
> I'm working on adding a permissions model to hadoop's DFS. The first step is
> this change, which associates user info with files. Following this I'll
> assoicate permissions info, then block methods based on that user info, then
> authorization of the user info.
> So, right now i've implemented adding user info to files. I'm looking for
> feedback before I clean this up and make it offical.
> I wasn't sure what release, i'm working off trunk.
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