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From "Denny Ye (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-3063) NameNode should validate all coming file path
Date Thu, 08 Mar 2012 07:01:06 GMT

     [ https://issues.apache.org/jira/browse/HDFS-3063?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Denny Ye updated HDFS-3063:
---------------------------

    Status: Patch Available  (was: Open)

Validation for NameNode interface
                
> NameNode should validate all coming file path
> ---------------------------------------------
>
>                 Key: HDFS-3063
>                 URL: https://issues.apache.org/jira/browse/HDFS-3063
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: name-node
>    Affects Versions: 0.20.205.0
>            Reporter: Denny Ye
>            Priority: Minor
>              Labels: namenode
>
> NameNode provides RPC service for not only DFS client but also user defined program.
A common case we always met is that user transfers file path prefixed with HDFS protocol("hdfs://{namenode:{port}}/{folder}/{file}").
NameNode cannot map node meta-data with this path and always throw NPE. In user client, we
only see the NullPointerException, no other tips for which step it occurs. 
> Also, NameNode should validate all coming file path with regular format.
> One exception I met:
> Exception in thread "main" org.apache.hadoop.ipc.RemoteException: java.io.IOException:
java.lang.NullPointerException
> 	at org.apache.hadoop.hdfs.server.namenode.INode.getPathComponents(INode.java:334)
> 	at org.apache.hadoop.hdfs.server.namenode.INode.getPathComponents(INode.java:329)

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