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https://issues.apache.org/jira/browse/HDFS-1773?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tanping Wang updated HDFS-1773:
-------------------------------
Attachment: HDFS-1867.patch
Upload the patch generated for trunk(with Federation).
"Hide/not display/forget" an already decommissioned data node who is neither in
include nor exclude hosts lists from the list of live or dead nodes. This is
being found useful for operators to make the cluster forget a decommissioned
data node. The operation procedure is as following:
Step I: Host must have been in the include hosts list and the include hosts
list must not be empty.
Step II: Host is decommissioned by remaining in the include hosts list and
added into the exclude hosts list. Name node is updated with the new
information by issuing dfsadmin -refreshNodes command.
Step III: Host is removed from both include hosts and exclude hosts lists. Name
node is updated with the new information by issuing dfsamin -refreshNodes
command.
Couple variations to consider:
1. Step II variation ( all the other steps are the same), if a node is added
into exclude list, but removed from include list, the node will appear as dead
node.
2. Step III variation (all the other steps are the same), if a node remains
in
the include list, but removed from exclude list, the node will rejoin as a
live node.
> Remove a datanode from cluster if include list is not empty and this datanode
> is removed from both include and exclude lists
> ----------------------------------------------------------------------------------------------------------------------------
>
> Key: HDFS-1773
> URL: https://issues.apache.org/jira/browse/HDFS-1773
> Project: Hadoop HDFS
> Issue Type: Improvement
> Affects Versions: 0.20.203.1, 0.23.0
> Environment: branch-20-security
> Reporter: Tanping Wang
> Assignee: Tanping Wang
> Priority: Minor
> Fix For: 0.20.204.0, 0.23.0
>
> Attachments: HDFS-1773-2.patch, HDFS-1773-3.patch, HDFS-1773.patch,
> HDFS-1867.patch
>
>
> Our service engineering team who operates the clusters on a daily basis
> founds it is confusing that after a data node is decommissioned, there is no
> way to make the cluster forget about this data node and it always remains in
> the dead node list.
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