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https://issues.apache.org/jira/browse/HDFS-17313?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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huangzhaobo resolved HDFS-17313.
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Resolution: Fixed
> dfsadmin -reconfig option to start/query reconfig on all live namenodes.
> ------------------------------------------------------------------------
>
> Key: HDFS-17313
> URL: https://issues.apache.org/jira/browse/HDFS-17313
> Project: Hadoop HDFS
> Issue Type: New Feature
> Reporter: huangzhaobo
> Assignee: huangzhaobo
> Priority: Major
> Labels: pull-request-available
>
> https://issues.apache.org/jira/browse/HDFS-16568 Support batch refreshing of
> datanode configurations.
> There are several nn in the HA or Federated Cluster, and this ticket
> implements batch refreshing of nn configurations.
> *Implementation method*
> # Use the DFSUtil.getNNServiceRpcAddressesForCluster method to parse the
> configuration and obtain the addresses of all nn's
> # Using two worker threads, currently does not support configuring the
> number of worker threads (will be implemented in other ticket if necessary)
> *Sample outputs*
> {code:java}
> $ bin/hdfs dfsadmin -reconfig namenode livenodes start
> Started reconfiguration task on node [localhost:50034].
> Started reconfiguration task on node [localhost:50036].
> Started reconfiguration task on node [localhost:50038].
> Started reconfiguration task on node [localhost:50040].
> Starting of reconfiguration task successful on 4 nodes, failed on 0 nodes.
> $ bin/hdfs dfsadmin -reconfig namenode livenodes status
> Reconfiguring status for node [localhost:50034]
> SUCCESS: Changed property dfs.heartbeat.interval
> From: "5"
> To: "3"
> Reconfiguring status for node [localhost:50036]
> SUCCESS: Changed property dfs.heartbeat.interval
> From: "5"
> To: "3"
> Reconfiguring status for node [localhost:50038]
> SUCCESS: Changed property dfs.heartbeat.interval
> From: "5"
> To: "3"
> Reconfiguring status for node [localhost:50040]
> SUCCESS: Changed property dfs.heartbeat.interval
> From: "5"
> To: "3"
> Retrieval of reconfiguration status successful on 4 nodes, failed on 0
> nodes.{code}
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