mjsax commented on a change in pull request #8697:
URL: https://github.com/apache/kafka/pull/8697#discussion_r428930276
##########
File path:
streams/src/test/java/org/apache/kafka/streams/processor/internals/StreamTaskTest.java
##########
@@ -420,6 +422,50 @@ public void shouldRecordProcessRatio() {
assertThat(metric.metricValue(), equalTo(1.0d));
}
+ @Test
+ public void shouldRecordE2ELatency() {
+ time = new MockTime(0L, 0L, 0L);
+ metrics = new Metrics(new
MetricConfig().recordLevel(Sensor.RecordingLevel.DEBUG), time);
+
+ task = createStatelessTask(createConfig(false, "0"),
StreamsConfig.METRICS_LATEST);
+
+ final KafkaMetric maxMetric = getMetric("record-e2e-latency",
"%s-max", task.id().toString(), StreamsConfig.METRICS_LATEST);
+ final KafkaMetric minMetric = getMetric("record-e2e-latency",
"%s-min", task.id().toString(), StreamsConfig.METRICS_LATEST);
+
+ assertThat(maxMetric.metricValue(), equalTo(Double.NaN));
+
+ task.addRecords(partition1, asList(
+ getConsumerRecord(partition1, 0L),
+ getConsumerRecord(partition1, 10L),
+ getConsumerRecord(partition1, 5L),
+ getConsumerRecord(partition1, 20L)
Review comment:
We we increase this ts to 35? This would allow to test min in the last
step better
##########
File path:
streams/src/test/java/org/apache/kafka/streams/processor/internals/metrics/TaskMetricsTest.java
##########
@@ -14,15 +14,11 @@
* See the License for the specific language governing permissions and
* limitations under the License.
*/
-package org.apache.kafka.streams.kstream.internals.metrics;
+package org.apache.kafka.streams.processor.internals.metrics;
Review comment:
Nice one!
##########
File path:
streams/src/main/java/org/apache/kafka/streams/processor/internals/metrics/TaskMetrics.java
##########
@@ -86,6 +87,14 @@ private TaskMetrics() {}
private static final String NUM_BUFFERED_RECORDS_DESCRIPTION = "The count
of buffered records that are polled " +
"from consumer and not yet processed for this active task";
+ private static final String RECORD_E2E_LATENCY = "record-e2e-latency";
+ static final String RECORD_E2E_LATENCY_MAX_DESCRIPTION =
+ "The maximum end-to-end latency of a record, measuring by comparing
the record timestamp with the "
+ + "system time when it has been fully processed by the task";
Review comment:
Assuming that a task might have a cache, is this correct, ie, `has been
fully processed by the task`)?
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