He Xiaoqiao created HDFS-14351:
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Summary: Optimize configuration item resolving for monitor namenode
Key: HDFS-14351
URL: https://issues.apache.org/jira/browse/HDFS-14351
Project: Hadoop HDFS
Issue Type: Sub-task
Components: rbf
Reporter: He Xiaoqiao
Assignee: He Xiaoqiao
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.
{code:java}
<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>
{code}
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