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Posted to dev@helix.apache.org by GitBox <gi...@apache.org> on 2019/07/30 00:23:56 UTC
[GitHub] [helix] kaisun2000 commented on a change in pull request #363: Fix
the race condition while Helix refresh cluster status cache.
kaisun2000 commented on a change in pull request #363: Fix the race condition while Helix refresh cluster status cache.
URL: https://github.com/apache/helix/pull/363#discussion_r308489309
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File path: helix-core/src/main/java/org/apache/helix/controller/dataproviders/BaseControllerDataProvider.java
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@@ -82,7 +84,7 @@
private ExecutorService _asyncTasksThreadPool;
// A map recording what data has changed
- protected Map<HelixConstants.ChangeType, Boolean> _propertyDataChangedMap;
+ protected Map<HelixConstants.ChangeType, AtomicBoolean> _propertyDataChangedMap;
Review comment:
I think the atomicBoolean here is not essential. To fix this bug, we don't really need atomicBoolean. It is essential to use a concurrentHashMap as notifyDataChange() will update value in this map to true in an async way. Value changed in ConcurrentHashMap is considered as safe publication anyway.
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