Yang-LI-CS commented on code in PR #743:
URL:
https://github.com/apache/flink-kubernetes-operator/pull/743#discussion_r1441489844
##########
flink-autoscaler/src/main/java/org/apache/flink/autoscaler/metrics/ScalingMetrics.java:
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@@ -216,15 +216,23 @@ private static double getNumRecordsInPerSecond(
Map<FlinkMetric, AggregatedMetric> flinkMetrics,
JobVertexID jobVertexID,
boolean isSource) {
+ // Generate numRecordsInPerSecond from 3 metrics:
+ // 1. If available, directly use the NUM_RECORDS_IN_PER_SEC task
metric.
var numRecordsInPerSecond =
flinkMetrics.get(FlinkMetric.NUM_RECORDS_IN_PER_SEC);
+ // 2. If the former is unavailable and the vertex contains a source
operator, use the
+ // corresponding source operator metric.
if (isSource && (numRecordsInPerSecond == null ||
numRecordsInPerSecond.getSum() == 0)) {
numRecordsInPerSecond =
flinkMetrics.get(FlinkMetric.SOURCE_TASK_NUM_RECORDS_IN_PER_SEC);
}
+ // 3. If the vertex contains a source operator which does not emit
input metrics, use output
+ // metrics instead.
+ // then use SOURCE_TASK_NUM_RECORDS_OUT_PER_SEC metric
Review Comment:
@1996fanrui indeed, I'll remove it
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