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https://issues.apache.org/jira/browse/HDFS-7611?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14294336#comment-14294336
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Jing Zhao commented on HDFS-7611:
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I cannot reproduce the failure of TestOpenFilesWithSnapshot in my local
environment. And the new Jenkins run did not complain it. Looks like this is
intermittent.
>From the log of the previous run looks like the DNs could not finish
>registration and block report during {{waitClusterUp}}. Maybe this is related
>to 1) slow environment, and 2) the client was still trying to write data to
>DNs in the test thus triggered IBR which delayed the process further. We can
>open a separate jira to track this if you think it's necessary.
> 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: Byron Wong
> Priority: Critical
> 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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