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From "Kihwal Lee (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-9696) Garbage snapshot records lingering forever
Date Fri, 12 Aug 2016 22:08:20 GMT

    [ https://issues.apache.org/jira/browse/HDFS-9696?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15419584#comment-15419584
] 

Kihwal Lee commented on HDFS-9696:
----------------------------------

It looks like these tests failed because the snapshot section wasn't present. When the existing
namenode reloads such an image, the snapshot manager state may not be properly reset. I made
it skip only the diff section and they seem to pass. 

> Garbage snapshot records lingering forever
> ------------------------------------------
>
>                 Key: HDFS-9696
>                 URL: https://issues.apache.org/jira/browse/HDFS-9696
>             Project: Hadoop HDFS
>          Issue Type: Bug
>    Affects Versions: 2.7.2
>            Reporter: Kihwal Lee
>            Assignee: Kihwal Lee
>            Priority: Critical
>         Attachments: HDFS-9696.patch, HDFS-9696.v2.patch
>
>
> We have a cluster where the snapshot feature might have been tested years ago. When the
HDFS does not have any snapshot, but I see filediff records persisted in its fsimage.  Since
it has been restarted many times and checkpointed over 100 times since then, it must haven
been persisted and  carried over since then.



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