xinglin commented on code in PR #5764:
URL: https://github.com/apache/hadoop/pull/5764#discussion_r1239137137
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hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/NameNode.java:
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@@ -2051,6 +2056,26 @@ synchronized HAServiceState getServiceState() {
return state.getServiceState();
}
+ /**
+ * Emit Namenode HA service state as an integer so that one can monitor NN HA
+ * state based on this metric.
+ *
+ * @return 0 when not fully started
+ * 1 for active or standalone (non-HA) NN
+ * 2 for standby
+ * 3 for observer
+ *
Review Comment:
Searching codebase, it seems we would set a state to STOPPING state only in
YARN ResourceManager HA. We are not using that state in HDFS.
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