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From "Gaurav Kanade (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-12717) NPE when trying to rename a directory in Windows Azure Storage FileSystem
Date Thu, 03 Mar 2016 22:49:18 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-12717?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15178758#comment-15178758

Gaurav Kanade commented on HADOOP-12717:

Thanks [~madhuch-ms]; [~rayokota] has provided the original patch and I'm not sure what test
we can add; however I spoke to [~dchickabasapa] to get this signed off and +1 from me again;
it seems this issue will always be hit when multiple file systems interact in scenarios such
as export and so on; recently several people are facing this and we need to move fast on this.

> NPE when trying to rename a directory in Windows Azure Storage FileSystem
> -------------------------------------------------------------------------
>                 Key: HADOOP-12717
>                 URL: https://issues.apache.org/jira/browse/HADOOP-12717
>             Project: Hadoop Common
>          Issue Type: Bug
>    Affects Versions: 2.7.0
>            Reporter: Robert Yokota
>            Assignee: Robert Yokota
>         Attachments: HADOOP-12717.001.patch, diff.txt
> Encountered an NPE when trying to use the HBase utility ExportSnapshot with Azure as
the target.  
> It turns out verifyAndConvertToStandardFormat is returning null when determining the
hbaseRoot, and this is being added to the atomicRenameDirs set.
> java.lang.NullPointerException
>         at org.apache.hadoop.fs.azure.AzureNativeFileSystemStore.isKeyForDirectorySet(AzureNativeFileSystemStore.java:1059)
>         at org.apache.hadoop.fs.azure.AzureNativeFileSystemStore.isAtomicRenameKey(AzureNativeFileSystemStore.java:1053)
>         at org.apache.hadoop.fs.azure.NativeAzureFileSystem.prepareAtomicFolderRename(NativeAzureFileSystem.java:2098)
>         at org.apache.hadoop.fs.azure.NativeAzureFileSystem.rename(NativeAzureFileSystem.java:1996)
>         at org.apache.hadoop.hbase.snapshot.ExportSnapshot.run(ExportSnapshot.java:944)
>         at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
>         at com.yammer.calmie.snapshot.AbstractSnapshotUtil.exportSnapshot(AbstractSnapshotUtil.java:210)
>         at com.yammer.calmie.snapshot.AbstractSnapshotUtil.run(AbstractSnapshotUtil.java:79)
>         at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
>         at com.yammer.calmie.snapshot.SnapshotAzureBlobUtil.main(SnapshotAzureBlobUtil.java:85)

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