Github user zentol commented on a diff in the pull request:
https://github.com/apache/flink/pull/4187#discussion_r127400689
--- Diff:
flink-connectors/flink-connector-kafka-base/src/main/java/org/apache/flink/streaming/connectors/kafka/FlinkKafkaConsumerBase.java
---
@@ -505,6 +519,21 @@ public void run(SourceContext<T> sourceContext) throws
Exception {
throw new Exception("The partitions were not set for
the consumer");
}
+ // initialize commit metrics and default offset callback method
+ this.successfulCommits =
this.getRuntimeContext().getMetricGroup().counter("commitsSucceeded");
+ this.failedCommits =
this.getRuntimeContext().getMetricGroup().counter("commitsFailed");
+
+ this.offsetCommitCallback = new KafkaCommitCallback() {
+ @Override
+ public void onComplete(Exception exception) {
+ if (exception == null) {
+ successfulCommits.inc();
--- End diff --
If the callbacks are executed by another thread the result will be
inaccurate, as the default counter implementation is not thread-safe.
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