kaisun2000 commented on a change in pull request #1066:
URL: https://github.com/apache/helix/pull/1066#discussion_r465394923
##########
File path:
helix-core/src/main/java/org/apache/helix/controller/GenericHelixController.java
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@@ -757,9 +753,20 @@ private void handleEvent(ClusterEvent event,
BaseControllerDataProvider dataProv
}
event.addAttribute(AttributeName.ControllerDataProvider.name(),
dataProvider);
- logger.info(String.format("START: Invoking %s controller pipeline for
cluster %s event: %s %s",
- manager.getClusterName(), dataProvider.getPipelineName(),
event.getEventType(),
- event.getEventId()));
+ // If manager session changes, no need to run pipeline for the stale event.
+ Optional<String> eventSessionId =
event.getAttribute(AttributeName.EVENT_SESSION.name());
+ String managerSessionId = manager.getSessionId();
Review comment:
If I understand correctly, the sessionId here can still be stale.
eventually, we need sessionaware write of zkclient used by ZkHelixManager to
ensure correctness, right?
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