[ https://issues.apache.org/jira/browse/HADOOP-5134?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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dhruba borthakur updated HADOOP-5134:
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Status: Patch Available (was: Open)
> FSNamesystem#commitBlockSynchronization adds under-construction block locations to blocksMap
> --------------------------------------------------------------------------------------------
>
> Key: HADOOP-5134
> URL: https://issues.apache.org/jira/browse/HADOOP-5134
> Project: Hadoop Core
> Issue Type: Bug
> Components: dfs
> Affects Versions: 0.18.2
> Reporter: Hairong Kuang
> Assignee: dhruba borthakur
> Priority: Blocker
> Fix For: 0.18.4, 0.19.1
>
> Attachments: commitBlockSync.patch, commitBlockSync2.patch, commitBlockSync3.patch
>
>
> From my understanding of sync/append design, an under construction block should not have
any block locations associated with it in the blocksMap. So an under construction block will
not be managed by ReplicationMonitor.
> However, if there is an error in the write pipeline, a lease recovery will trigger a
call, commitBlockSynchronization, to NN. This call will add the successfully-recovered datanodes
to blocksMap. This seems to violate the design. It should update the targets of the last block
at INode instead.
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