xyuanlu commented on code in PR #2344:
URL: https://github.com/apache/helix/pull/2344#discussion_r1084647869
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helix-core/src/main/java/org/apache/helix/monitoring/mbeans/ClusterStatusMonitor.java:
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@@ -55,6 +55,55 @@
import org.slf4j.LoggerFactory;
public class ClusterStatusMonitor implements ClusterStatusMonitorMBean {
+ private class AsyncMissingTopStateMonitor extends Thread {
+ private final ConcurrentHashMap<String, Map<String, Long>>
_missingTopStateResourceMap;
+ private long _missingTopStateDurationThreshold = Long.MAX_VALUE;;
+
+ public AsyncMissingTopStateMonitor(ConcurrentHashMap<String, Map<String,
Long>> missingTopStateResourceMap) {
+ _missingTopStateResourceMap = missingTopStateResourceMap;
+ }
+
+ public void setMissingTopStateDurationThreshold(long
missingTopStateDurationThreshold) {
+ _missingTopStateDurationThreshold = missingTopStateDurationThreshold;
+ }
+
+ @Override
+ public void run() {
+ try {
+ synchronized (this) {
+ while (true) {
+ while (_missingTopStateResourceMap.size() == 0) {
+ this.wait();
+ }
+ for (Iterator<Map.Entry<String, Map<String, Long>>>
resourcePartitionIt =
+ _missingTopStateResourceMap.entrySet().iterator();
resourcePartitionIt.hasNext(); ) {
+ Map.Entry<String, Map<String, Long>> resourcePartitionEntry =
resourcePartitionIt.next();
+ // Iterate over all partitions and if any partition has missing
top state greater than threshold then report
+ // it.
+ ResourceMonitor resourceMonitor =
getOrCreateResourceMonitor(resourcePartitionEntry.getKey());
+ // If all partitions of resource has top state recovered then
reset the counter
+ if (resourcePartitionEntry.getValue().isEmpty()) {
+
resourceMonitor.resetOneOrManyPartitionsMissingTopStateRealTimeGuage();
+ resourcePartitionIt.remove();
+ } else {
+ for (Long missingTopStateStartTime :
resourcePartitionEntry.getValue().values()) {
+ if (_missingTopStateDurationThreshold < Long.MAX_VALUE &&
System.currentTimeMillis() - missingTopStateStartTime >
_missingTopStateDurationThreshold) {
+
resourceMonitor.updateOneOrManyPartitionsMissingTopStateRealTimeGuage();
+ }
+ }
+
+ }
+ }
+ // TODO: Check if this SLEEP_TIME is correct? Thread should keep
on increasing the counter continuously until top
+ // state is recovered but it can sleep for reasonable amount of
time in between.
+ sleep(100);
+ }
+ }
+ } catch (InterruptedException e) {
+ LOG.error("AsyncMissingTopStateMonitor has been interrupted.", e);
Review Comment:
Question about the interrupt handling here and in reset().
When the thread receives an interrupt in reset() and we log error and
returns..? Then no monitor thread is created and loop to continue
monitoring...?
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