haibow commented on issue #4172: Kafka Low Level Consumer (LLC) Offset Lag metrics URL: https://github.com/apache/incubator-pinot/issues/4172#issuecomment-501824632 @sunithabeeram you are right - lag has the issues described in the design. On double check, we are just 'monitoring' but not 'alerting' on lag. Originally I was wondering how to distinguish expected data staleness (e.g. stopped/windowed ingestion), but using dependent alerts on upstream traffic should help, i.e. if data is stale for X minutes, but input traffic was also flat for last X minutes, then the alert should be suppressed.
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