Daniel Klessing created STORM-2705:
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Summary: DRPCSpout sleeps twice when idle
Key: STORM-2705
URL: https://issues.apache.org/jira/browse/STORM-2705
Project: Apache Storm
Issue Type: Bug
Components: storm-core
Reporter: Daniel Klessing
Attachments: drpc_idle_overhead.png
Profiling our topology I noticed that the {{DRPCSpout}} actually sleeps twice
if it has nothing to do. This is due to a {{Utils.sleep(1)}} call at the end of
{{nextTuple()}} while the {{SleepSpoutWaitStrategy}} performs the default sleep
if a spout did not emit any tuple.
This causes - in my understanding - unnecessary context switches, especially
with a high number of parallelism.
Attached the corresponding YourKit screenshot.
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