lei-xia commented on a change in pull request #1413:
URL: https://github.com/apache/helix/pull/1413#discussion_r499821088
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File path:
helix-core/src/main/java/org/apache/helix/controller/dataproviders/BaseControllerDataProvider.java
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@@ -728,6 +782,100 @@ private void updateDisabledInstances() {
}
}
+ /*
+ * Check if the instance is timed-out during maintenance mode. An instance
is timed-out if it has
+ * been offline for longer than the user defined timeout window.
+ * @param timeOutWindow - the timeout window; guaranteed to be non-negative
+ */
+ private boolean isInstanceTimedOutDuringMaintenance(HelixDataAccessor
accessor, String instance,
+ long timeOutWindow) {
+ ParticipantHistory history =
+
accessor.getProperty(accessor.keyBuilder().participantHistory(instance));
+ long currentTime = System.currentTimeMillis();
+
+ // Parse online timestamps from online list
+ List<Long> onlineTimestamps = new ArrayList<>();
+ List<String> historyOnlineList = history.getHistory();
+ if (historyOnlineList != null) {
+ long tailOnlineTime;
+ for (int i = historyOnlineList.size() - 1; i >= 0; i--) {
+ tailOnlineTime =
+
ParticipantHistory.extractTimeFromSessionHistoryString(historyOnlineList.get(i));
+ // Ignore bad format case
+ if (tailOnlineTime != -1) {
+ onlineTimestamps.add(0, tailOnlineTime);
+ // We only need one online timestamp before maintenance mode starts
+ if (tailOnlineTime <= _maintenanceSignal.getTimestamp()) {
+ break;
+ }
+ }
Review comment:
Can we wrap up the logic here into a method in ParticipantHistory, such
as getAllOnlineHistory()?
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