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https://issues.apache.org/jira/browse/HDFS-12826?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16262252#comment-16262252
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usharani commented on HDFS-12826:
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[~vagarychen] thanks for taking a look.
bq. changing ipc to rpc instead?
Currently it's documented with {{rpc}} which can confuse as there is no
configuration for DN. So changing to {{ipc}} which will be more clear.
> Document Saying the RPC port, But it's required IPC port in Balancer Document.
> ------------------------------------------------------------------------------
>
> Key: HDFS-12826
> URL: https://issues.apache.org/jira/browse/HDFS-12826
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: balancer & mover, documentation
> Affects Versions: 3.0.0-beta1
> Reporter: Harshakiran Reddy
> Assignee: usharani
> Priority: Minor
> Attachments: HDFS-12826.patch
>
>
> In {{Adding a new Namenode to an existing HDFS cluster}} , refreshNamenodes
> command required IPC port but in Documentation it's saying the RPC port.
> http://hadoop.apache.org/docs/r3.0.0-beta1/hadoop-project-dist/hadoop-hdfs/Federation.html#Balancer
> {noformat}
> bin>:~/hdfsdata/HA/install/hadoop/datanode/bin> ./hdfs dfsadmin
> -refreshNamenodes host-name:65110
> refreshNamenodes: Unknown protocol:
> org.apache.hadoop.hdfs.protocol.ClientDatanodeProtocol
> bin.:~/hdfsdata/HA/install/hadoop/datanode/bin> ./hdfs dfsadmin
> -refreshNamenodes
> Usage: hdfs dfsadmin [-refreshNamenodes datanode-host:ipc_port]
> bin>:~/hdfsdata/HA/install/hadoop/datanode/bin> ./hdfs dfsadmin
> -refreshNamenodes host-name:50077
> bin>:~/hdfsdata/HA/install/hadoop/datanode/bin>
> {noformat}
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