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https://issues.apache.org/jira/browse/HDFS-7611?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14296055#comment-14296055
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Hudson commented on HDFS-7611:
------------------------------

FAILURE: Integrated in Hadoop-trunk-Commit #6953 (See 
[https://builds.apache.org/job/Hadoop-trunk-Commit/6953/])
HDFS-7611. deleteSnapshot and delete of a file can leave orphaned blocks in the 
blocksMap on NameNode restart. Contributed by Jing Zhao and Byron Wong. (jing9: 
rev d244574d03903b0514b0308da85d2f06c2384524)
* 
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSDirectory.java
* 
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSDirDeleteOp.java
* 
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/MiniDFSCluster.java
* 
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSDirRenameOp.java
* 
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/snapshot/TestSnapshotDeletion.java
* hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt


> deleteSnapshot and delete of a file can leave orphaned blocks in the 
> blocksMap on NameNode restart.
> ---------------------------------------------------------------------------------------------------
>
>                 Key: HDFS-7611
>                 URL: https://issues.apache.org/jira/browse/HDFS-7611
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: namenode
>    Affects Versions: 2.6.0
>            Reporter: Konstantin Shvachko
>            Assignee: Jing Zhao
>            Priority: Critical
>             Fix For: 2.7.0
>
>         Attachments: HDFS-7611.000.patch, HDFS-7611.001.patch, 
> HDFS-7611.002.patch, blocksNotDeletedTest.patch, testTruncateEditLogLoad.log
>
>
> If quotas are enabled a combination of operations *deleteSnapshot* and 
> *delete* of a file can leave  orphaned  blocks in the blocksMap on NameNode 
> restart. They are counted as missing on the NameNode, and can prevent 
> NameNode from coming out of safeMode and could cause memory leak during 
> startup.



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