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https://issues.apache.org/jira/browse/HADOOP-14455?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16098042#comment-16098042
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Vinayakumar B commented on HADOOP-14455:
----------------------------------------

Patch looks almost good.

Just 2 nits, You can commit once addressed.
1. Even though reaching this line is impossible now, it should be 
{{IllegalArgumentException}} not {{IllegalStateException}}.
{code}+    default:
+      throw new IllegalStateException("Unexpected rename strategy");
     }
{code}

2. In below code, you can remove the comment line.  Its no longer relavant here
{code}-    resSrc.targetFileSystem.renameInternal(resSrc.remainingPath,
-      resDst.remainingPath, overwrite);
+    //Alternate 1: renames within same file system
+    URI srcUri = resSrc.targetFileSystem.getUri();
+    URI dstUri = resDst.targetFileSystem.getUri();
+    ViewFileSystem.verifyRenameStrategy(srcUri, dstUri,
+        resSrc.targetFileSystem == resDst.targetFileSystem, 
renameStrategy);{code}

Once addressed, you can commit, unless others have different opinion

> ViewFileSystem#rename should support be supported within same nameservice 
> with different mountpoints
> ----------------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-14455
>                 URL: https://issues.apache.org/jira/browse/HADOOP-14455
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: viewfs
>            Reporter: Brahma Reddy Battula
>            Assignee: Brahma Reddy Battula
>         Attachments: HADOOP-14455-002.patch, HADOOP-14455-003.patch, 
> HADOOP-14455-004.patch, HADOOP-14455-005.patch, HADOOP-14455-006.patch, 
> HADOOP-14455.patch
>
>
> *Scenario:* 
> || Mount Point || NameService|| Value||
> |/tmp|hacluster|/tmp|
> |/user|hacluster|/user|
> Move file from {{/tmp}} to {{/user}}
> It will fail by throwing the following error
> {noformat}
> Caused by: java.io.IOException: Renames across Mount points not supported
>         at 
> org.apache.hadoop.fs.viewfs.ViewFileSystem.rename(ViewFileSystem.java:500)
>         at org.apache.hadoop.hive.ql.metadata.Hive.moveFile(Hive.java:2692)
>         ... 22 more
> {noformat}



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