mirror of https://github.com/apache/kafka.git
07fee62afe
This patch copy over existing metrics and add new consumer group metrics to the new GroupCoordinatorService. Now that each coordinator is responsible for a topic partition, this patch introduces a GroupCoordinatorMetrics that records gauges for global metrics such as the number of generic groups in PreparingRebalance state, etc. For GroupCoordinatorShard specific metrics, GroupCoordinatorMetrics will activate new GroupCoordinatorMetricsShards that will be responsible for incrementing/decrementing TimelineLong objects and then aggregate the total amount across all shards. As the CoordinatorRuntime/CoordinatorShard does not care about group metadata, we have introduced a CoordinatorMetrics.java/CoordinatorMetricsShard.java so that in the future transaction coordinator metrics can also be onboarded in a similar fashion. Main files to look at: GroupCoordinatorMetrics.java GroupCoordinatorMetricsShard.java CoordinatorMetrics.java CoordinatorMetricsShard.java CoordinatorRuntime.java Metrics to add after #14408 is merged: offset deletions sensor (OffsetDeletions); Meter(offset-deletion-rate, offset-deletion-count) Metrics to add after https://issues.apache.org/jira/browse/KAFKA-14987 is merged: offset expired sensor (OffsetExpired); Meter(offset-expiration-rate, offset-expiration-count) Reviewers: Justine Olshan <jolshan@confluent.io> |
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