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From "Aaron T. Myers (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-2367) HA: Enable the configuration of multiple HA cluster addresses
Date Thu, 19 Jan 2012 19:30:41 GMT

    [ https://issues.apache.org/jira/browse/HDFS-2367?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13189321#comment-13189321

Aaron T. Myers commented on HDFS-2367:

bq. In theory this should also support a non-federated configuration by just specifying dfs.ha.namenodes
and then dfs.namenode.rpc-address.nn1, etc.. have you tested that manually?

I talked to Todd about this, and we concluded this isn't actually true. Some of the server
side configuration is implemented such that it could deal with a null value for nameServiceId,
but the configuration is necessary for client side failover to be configured correctly.

bq. Can you either leave this TODO in there, or file a JIRA for it?

Filed: HDFS-2811
> HA: Enable the configuration of multiple HA cluster addresses
> -------------------------------------------------------------
>                 Key: HDFS-2367
>                 URL: https://issues.apache.org/jira/browse/HDFS-2367
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: ha, hdfs client
>    Affects Versions: HA branch (HDFS-1623)
>            Reporter: Aaron T. Myers
>            Assignee: Aaron T. Myers
>             Fix For: HA branch (HDFS-1623)
>         Attachments: HDFS-2367-HDFS-1623.patch, HDFS-2367-HDFS-1623.patch
> Todd pointed out this issue with the current patch posted for HDFS-1623. It seems like
the solution would be to replace "dfs.ha.namenode.addresses" with something like "dfs.ha.namenode.addresses.<logical-uri>",
so as to be able to support configuring the addresses of multiple HA clusters.

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