Github user kl0u commented on a diff in the pull request:
https://github.com/apache/flink/pull/3484#discussion_r106139593
--- Diff:
flink-streaming-java/src/main/java/org/apache/flink/streaming/runtime/tasks/OperatorChain.java
---
@@ -441,26 +486,53 @@ public void close() {
private static final class CopyingChainingOutput<T> extends
ChainingOutput<T> {
private final TypeSerializer<T> serializer;
-
+
public CopyingChainingOutput(
OneInputStreamOperator<T, ?> operator,
TypeSerializer<T> serializer,
+ OutputTag<T> outputTag,
StreamStatusProvider streamStatusProvider) {
- super(operator, streamStatusProvider);
+ super(operator, streamStatusProvider, outputTag);
this.serializer = serializer;
}
@Override
public void collect(StreamRecord<T> record) {
+ if (this.outputTag != null) {
+ // we are only responsible for emitting to the
main input
+ return;
+ }
+
+ pushToOperator(record);
+ }
+
+ @Override
+ public <X> void collect(OutputTag<?> outputTag, StreamRecord<X>
record) {
+ if (this.outputTag == null ||
!this.outputTag.equals(outputTag)) {
+ // we are only responsible for emitting to the
side-output specified by our
+ // OutputTag.
+ return;
+ }
+
+ pushToOperator(record);
+ }
+
+ @Override
+ protected <X> void pushToOperator(StreamRecord<X> record) {
try {
+ // we know that the given outputTag matches our
OutputTag so the record
+ // must be of the type that our operator (and
Serializer) expects.
+ @SuppressWarnings("unchecked")
+ StreamRecord<T> castRecord = (StreamRecord<T>)
record;
+
numRecordsIn.inc();
- StreamRecord<T> copy =
record.copy(serializer.copy(record.getValue()));
+ StreamRecord<T> copy =
castRecord.copy(serializer.copy(castRecord.getValue()));
operator.setKeyContextElement1(copy);
- operator.processElement(copy);
- }
- catch (Exception e) {
+ operator.processElement(castRecord);
--- End diff --
This should be `copy`, not `castRecord`.
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