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https://issues.apache.org/jira/browse/HDFS-7493?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ted Yu resolved HDFS-7493.
--------------------------
    Resolution: Duplicate

Dup of HDFS-7538

> removedDst should be checked against null in finally block of 
> FSDirRenameOp#unprotectedRenameTo()
> -------------------------------------------------------------------------------------------------
>
>                 Key: HDFS-7493
>                 URL: https://issues.apache.org/jira/browse/HDFS-7493
>             Project: Hadoop HDFS
>          Issue Type: Bug
>            Reporter: Ted Yu
>            Priority: Minor
>
> {code}
>           removedDst = dstIIP.getLastINode();
>           undoRemoveDst = true;
> {code}
> If removedDst is null, the following code in finally block may result in NPE:
> {code}
>         if (dstParent.isDirectory() &&
>             dstParent.asDirectory().isWithSnapshot()) {
>           dstParent.asDirectory().undoRename4DstParent(removedDst,
>               dstIIP.getLatestSnapshotId());
> {code}



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