Hello all, Unless I'm missing something, the synchronization in FSNameSystemMetrics on the 0.20 does not appear correct. It locks on itself while pulling various metrics from the FSNameSystem object. For example, FSNameSystem.getBlocksTotal() delegates to BlocksMap.size() which delegates to the contained HashMap object. None of those methods are synchronized on FSNameSystem, so one cannot get accurate data for that metric. Is this intentional?
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