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https://issues.apache.org/jira/browse/HADOOP-6048?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kan Zhang updated HADOOP-6048:
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Attachment: 6048-09.patch
this patch does the following.
1. when the primary datanode recovers a block, it sends back a newly generated
access token along a new generation stamp if any.
2. add a namenode method so that a DFSClient can call to get a new access token
when access token becomes expired during datanode error recovery.
3. To differentiate access token error from other errors, datanode now needs to
send back a status code together with firstBadLink during pipeline setup for
dfs write (only for DFSClients, not for other datanodes).
> Need to handle access token expiration when re-establishing the pipeline for
> dfs write
> --------------------------------------------------------------------------------------
>
> Key: HADOOP-6048
> URL: https://issues.apache.org/jira/browse/HADOOP-6048
> Project: Hadoop Core
> Issue Type: Bug
> Components: dfs, security
> Reporter: Kan Zhang
> Assignee: Kan Zhang
> Attachments: 6048-09.patch
>
>
> Original access token may have expired when re-establishing the pipeline
> within processDatanodeError().
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