mjsax commented on code in PR #15189:
URL: https://github.com/apache/kafka/pull/15189#discussion_r1520627804
##########
streams/src/main/java/org/apache/kafka/streams/kstream/internals/StreamStreamJoinUtil.java:
##########
@@ -25,36 +25,46 @@
public final class StreamStreamJoinUtil {
- private StreamStreamJoinUtil(){
+ private StreamStreamJoinUtil() {
}
public static <KIn, VIn, KOut, VOut> boolean skipRecord(
final Record<KIn, VIn> record, final Logger logger,
final Sensor droppedRecordsSensor,
- final ProcessorContext<KOut, VOut> context) {
+ final ProcessorContext<KOut, VOut> context
+ ) {
// we do join iff keys are equal, thus, if key is null we cannot join
and just ignore the record
//
// we also ignore the record if value is null, because in a key-value
data model a null-value indicates
// an empty message (ie, there is nothing to be joined) -- this
contrast SQL NULL semantics
// furthermore, on left/outer joins 'null' in ValueJoiner#apply()
indicates a missing record --
// thus, to be consistent and to avoid ambiguous null semantics, null
values are ignored
if (record.key() == null || record.value() == null) {
- if (context.recordMetadata().isPresent()) {
- final RecordMetadata recordMetadata =
context.recordMetadata().get();
- logger.warn(
- "Skipping record due to null key or value. "
- + "topic=[{}] partition=[{}] offset=[{}]",
- recordMetadata.topic(), recordMetadata.partition(),
recordMetadata.offset()
- );
- } else {
- logger.warn(
- "Skipping record due to null key or value. Topic,
partition, and offset not known."
- );
- }
- droppedRecordsSensor.record();
+ logSkip("null key or value", logger, droppedRecordsSensor,
context);
return true;
} else {
return false;
}
}
+
+ public static <KOut, VOut> void logSkip(
+ final String reason,
+ final Logger logger,
+ final Sensor droppedRecordsSensor,
+ final ProcessorContext<KOut, VOut> context
+ ) {
+ if (context.recordMetadata().isPresent()) {
+ final RecordMetadata recordMetadata =
context.recordMetadata().get();
+ logger.warn(
+ "Skipping record. reason=[{}] topic=[{}] partition=[{}]
offset=[{}]",
Review Comment:
```suggestion
"Skipping record. Reason=[{}] topic=[{}] partition=[{}]
offset=[{}]",
```
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