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From "dhruba borthakur (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-3329) DatanodeDescriptor objects stored in FSImage may be out dated.
Date Fri, 09 May 2008 21:39:55 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-3329?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12595728#action_12595728

dhruba borthakur commented on HADOOP-3329:

I just committed this.

> DatanodeDescriptor objects stored in FSImage may be out dated.
> --------------------------------------------------------------
>                 Key: HADOOP-3329
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3329
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: dfs
>            Reporter: Tsz Wo (Nicholas), SZE
>            Assignee: dhruba borthakur
>             Fix For: 0.18.0
>         Attachments: lastBlockLocations.patch
> INodeFileUnderConstruction.targets is a DatanodeDescriptor array which stores the locations
for last block.  These DatanodeDescriptors are serialized and stored in the FSImage.  However,
a DatanodeDescriptor contains information like IP address and ports.  These information may
be out dated after a datanode restart.
> We should probably only stored the storageID of a DatanodeDescriptor in FSImage and then
lookup the DatanodeDescriptor object from the datanodeMap.

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