mas-chen commented on code in PR #22303:
URL: https://github.com/apache/flink/pull/22303#discussion_r1152679757
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flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/connector/kafka/sink/KafkaWriter.java:
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@@ -420,6 +420,7 @@ private void checkAsyncException() throws IOException {
if (e != null) {
asyncProducerException = null;
+ numRecordsOutErrorsCounter.inc();
Review Comment:
The logic for counter is duplicated because it is possible for
write/flush/WriterCallback-mailbox to throw the exception. When the exception
is thrown, the counter should also be incremented.
Ideally, we can increment the counter once when I detect the exception
(inside the WriterCallback, before the mailbox) but we have no control over the
Counter and it is not volatile.
I also am questioning the value of such a counter because the exception
should cause a DAG restart.
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