hadoop-hdfs-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Vinay (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-5428) under construction files deletion after snapshot+checkpoint+nn restart leads nn safemode
Date Thu, 07 Nov 2013 02:43:17 GMT

    [ https://issues.apache.org/jira/browse/HDFS-5428?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13815580#comment-13815580
] 

Vinay commented on HDFS-5428:
-----------------------------

I tried to update the patch according to my previous comment.
But to replace the exact inode we need to have the full snapshot path. in the current case
since the full snapshot path is not tracked anywhere we cannot replace the INode.
Need a way to track the full path of the snapshot INode and replace the INode with INodeFileUC.

> under construction files deletion after snapshot+checkpoint+nn restart leads nn safemode
> ----------------------------------------------------------------------------------------
>
>                 Key: HDFS-5428
>                 URL: https://issues.apache.org/jira/browse/HDFS-5428
>             Project: Hadoop HDFS
>          Issue Type: Bug
>    Affects Versions: 3.0.0, 2.2.0
>            Reporter: Vinay
>            Assignee: Vinay
>         Attachments: HDFS-5428-v2.patch, HDFS-5428.000.patch, HDFS-5428.patch
>
>
> 1. allow snapshots under dir /foo
> 2. create a file /foo/test/bar and start writing to it
> 3. create a snapshot s1 under /foo after block is allocated and some data has been written
to it
> 4. Delete the directory /foo/test
> 5. wait till checkpoint or do saveNameSpace
> 6. restart NN.
> NN enters to safemode.
> Analysis:
> Snapshot nodes loaded from fsimage are always complete and all blocks will be in COMPLETE
state. 
> So when the Datanode reports RBW blocks those will not be updated in blocksmap.
> Some of the FINALIZED blocks will be marked as corrupt due to length mismatch.



--
This message was sent by Atlassian JIRA
(v6.1#6144)

Mime
View raw message