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https://issues.apache.org/jira/browse/HDFS-9330?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15118377#comment-15118377
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Arpit Agarwal commented on HDFS-9330:
-------------------------------------
I think another pre-existing bug is this piece of code in
{{DataNode#refreshVolumes}}:
{code}
conf.set(DFS_DATANODE_DATA_DIR_KEY,
Joiner.on(",").join(effectiveVolumes));
dataDirs = getStorageLocations(conf);
{code}
If the effectiveVolumes set is not the same as the list passed in, this will be
immediately undone as soon as {{DataNode#reconfigurePropertyImpl}} returns by
{{ReconfigurableBase#reconfigureProperty}}
{code}
reconfigurePropertyImpl(property, newVal);
if (newVal != null) {
getConf().set(property, newVal);
} else {
getConf().unset(property);
}
{code}
I will comment on HDFS-7035.
> Support reconfiguring dfs.datanode.duplicate.replica.deletion without DN
> restart
> ---------------------------------------------------------------------------------
>
> Key: HDFS-9330
> URL: https://issues.apache.org/jira/browse/HDFS-9330
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: datanode
> Reporter: Xiaobing Zhou
> Assignee: Xiaobing Zhou
> Attachments: HDFS-9330-HDFS-9000.002.patch,
> HDFS-9330-HDFS-9000.003.patch, HDFS-9330.001.patch
>
>
> This is to reconfigure
> {code}
> dfs.datanode.duplicate.replica.deletion
> {code}
> without restarting DN.
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