virajjasani commented on code in PR #5691:
URL: https://github.com/apache/hadoop/pull/5691#discussion_r1207016560
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hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/router/NamenodeHeartbeatService.java:
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@@ -482,17 +508,36 @@ private void
updateHAStatusParameters(NamenodeStatusReport report) {
}
}
+ /**
+ * Evaluates whether the JMX report should be refreshed by
+ * calling the Namenode, based on the following conditions:
+ * 1. JMX Updates must be enabled.
+ * 2. The last attempt to update JMX occurred before the
+ * configured interval (if any).
+ */
+ private boolean shouldUpdateJmx() {
+ return updateJmxEnabled
+ && (updateJmxIntervalMs < 0
+ || Time.monotonicNow() - lastJmxUpdateAttempt > updateJmxIntervalMs);
Review Comment:
can we only rely on one config rather than both? here we can get rid of
`updateJmxEnabled` and only rely on `updateJmxIntervalMs`?
something like:
if updateJmxIntervalMs < 0 => return false (disabled)
if updateJmxIntervalMs == 0 => return true (enabled)
if updateJmxIntervalMs > 0 => return `Time.monotonicNow() -
lastJmxUpdateAttempt > updateJmxIntervalMs`
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