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https://issues.apache.org/jira/browse/HADOOP-3329?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12594644#action_12594644
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Tsz Wo (Nicholas), SZE commented on HADOOP-3329:
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+1 codes look good
> 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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