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From "Raghu Angadi (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-1298) adding user info to file
Date Fri, 07 Sep 2007 04:53:29 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-1298?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12525593

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 :


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)


> 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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