[GitHub] [helix] NealSun96 commented on a change in pull request #1413: Feature: Offline Node Timeout During Maintenance Mode

[GitBox <gi...@apache.org>]

NealSun96 commented on a change in pull request #1413:
URL: https://github.com/apache/helix/pull/1413#discussion_r498610539



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File path: helix-core/src/main/java/org/apache/helix/controller/dataproviders/BaseControllerDataProvider.java
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@@ -253,9 +254,34 @@ private void refreshIdealState(final HelixDataAccessor accessor,
   private void refreshLiveInstances(final HelixDataAccessor accessor,
       Set<HelixConstants.ChangeType> refreshedType) {
     if (_propertyDataChangedMap.get(HelixConstants.ChangeType.LIVE_INSTANCE).getAndSet(false)) {
+      // Keep a copy of old live instances in case of maintenance mode
+      Map<String, LiveInstance> oldLiveInstances = getLiveInstances();
       _liveInstanceCache.refresh(accessor);
       _updateInstanceOfflineTime = true;
       refreshedType.add(HelixConstants.ChangeType.LIVE_INSTANCE);
+
+      // If maintenance mode is enabled and timeout window is specified, filter 'new' live nodes
+      // for timed-out nodes
+      long timeOutWindow = _clusterConfig.getMaintenanceOfflineNodeTimeOut();
+      if (timeOutWindow >= 0 && isMaintenanceModeEnabled()) {
+        for (String instance : _liveInstanceCache.getPropertyMap().keySet()) {
+          // For every 'new' live node, check if it's timed-out
+          if (!oldLiveInstances.containsKey(instance) && isInstanceTimedOutDuringMaintenance(

Review comment:
       The new method should address the problem. 




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