xyuanlu commented on code in PR #2344:
URL: https://github.com/apache/helix/pull/2344#discussion_r1084637020
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helix-core/src/main/java/org/apache/helix/monitoring/mbeans/ClusterStatusMonitor.java:
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@@ -109,9 +157,21 @@ public class ClusterStatusMonitor implements
ClusterStatusMonitorMBean {
private final Map<String, JobMonitor> _perTypeJobMonitorMap = new
ConcurrentHashMap<>();
+ /**
+ * Missing top state resource map:
resourceName-><PartitionName->startTimeOfMissingTopState>
+ */
+ private final Map<String, Map<String, Long>> _missingTopStateResourceMap =
new ConcurrentHashMap<>();
+ private final AsyncMissingTopStateMonitor _asyncMissingTopStateMonitor = new
AsyncMissingTopStateMonitor(_missingTopStateResourceMap);
+
public ClusterStatusMonitor(String clusterName) {
_clusterName = clusterName;
_beanServer = ManagementFactory.getPlatformMBeanServer();
+ /**
+ * Start a async thread for each cluster which keeps monitoring missing
top states of any resource for a cluster.
+ * This thread will keep on iterating over resources and report
missingTopStateDuration for them until there are at
+ * least one resource with missing top state for a cluster.
+ */
+ _asyncMissingTopStateMonitor.start();
Review Comment:
Sorry I did not follow. When ClusterStatusMonitor terminates, we need to
join this thread dont we?
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