[HDFS-14351] RBF: Optimize configuration item resolving for monitor namenode

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 3.3.0, HDFS-13891
• Component/s: rbf
• Hadoop Flags: Reviewed
• Assignee: Xiaoqiao He
• Reporter: Xiaoqiao He
• Created: 10/Mar/19 16:37
• Updated: 03/Sep/20 09:24
• Resolved: 20/Mar/19 06:15

Description

We invoke configuration.get to resolve configuration item `dfs.federation.router.monitor.namenode` at `Router.java`, then split the value by comma to get nsid and nnid, it may confused users since this is not compatible with blank space but other common parameters could do. The following segment show example that resolve fails.

  <property>
    <name>dfs.federation.router.monitor.namenode</name>
    <value>nameservice1.nn1, nameservice1.nn2</value>
    <description>
      The identifier of the namenodes to monitor and heartbeat.
    </description>
  </property>