I am not 100% sure what Burrow does, but I would assume that it compares committed offsets to end offsets (similar to `bin/kafka-consumer-group.sh`). This is a "global" view over all consumer in the group. Compare to the consumer metric, the might report a higher lag as it relies on consumer commits.
The consumer lag metric reports a single client view (obviously a consumer does not know anything about the lag of other consumers in the group) and it's based on the current fetch offsets the consumer maintains internally. Thus, the lag might be smaller if the offsets are not committed yet. -Matthias On 5/11/20 5:23 PM, Eleanore Jin wrote: > Hi community, > > I just wonder what is the difference between the consumer lag reported by > Kafka client and the consumer lag reported by burrow? > > Thanks a lot! > Eleanore >
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