rdhabalia opened a new pull request #4280: [pulsar-storm] add more metrics to troubleshoot spout throughput URL: https://github.com/apache/pulsar/pull/4280 ### Motivation Many time user sees lower throughput in pulsar-spout even though standalone consumer can consume such msgRate easily. It would be hard to debug user's topology without enough information so, adding two metrics which can impact spout throughput. - number of message filed: spout sleeps when it sees failed message so, it's important to have visibility of that count - number of times spout-thread not found the message in queue: spout topology internally sleeps if it doesn't see any emitted tuple in collector after triggering `nextTuple()` api. This metrics gives more visibility about consumer throughput.
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