Piotr Nowojski created FLINK-19174:
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Summary: idleTimeMsPerSecond can report incorrect values if task
is blocked for more then 60 seconds
Key: FLINK-19174
URL: https://issues.apache.org/jira/browse/FLINK-19174
Project: Flink
Issue Type: Bug
Components: Runtime / Metrics
Affects Versions: 1.12.0, 1.11.2
Reporter: Piotr Nowojski
If task is blocked for more than 60 seconds
({{org.apache.flink.metrics.MeterView#DEFAULT_TIME_SPAN_IN_SECONDS}}),
{{idleTimeMsPerSecond}} can be reported as zero, despite task being completely
idle. Once the task is unblocked and the {{idleTimeMsPerSecond}} metric is
updated, it can for the next 60 seconds exceed 1000ms/second.
Average value over the longer periods of time will be correct and accurate.
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