Handle Scope in Kafka producer properly
Holding onto scope in `Callback` is bad because that code may run on
different thread.
MODIFY
dd-java-agent/instrumentation/kafka-clients-0.11/src/main/java/datadog/trace/instrumentation/kafka_clients/KafkaProducerInstrumentation.java
dd-java-agent/instrumentation/kafka-clients-0.11/src/main/java/datadog/trace/instrumentation/kafka_clients/KafkaProducerInstrumentation.java
@@ -10,6 +10,7 @@ import static net.bytebuddy.matcher.ElementMatchers.takesArgument;
import com.google.auto.service.AutoService;
import datadog.trace.agent.tooling.Instrumenter;
import io.opentracing.Scope;
+import io.opentracing.Span;
import io.opentracing.propagation.Format;
import io.opentracing.util.GlobalTracer;
import java.util.Map;
@@ -70,7 +71,7 @@ public final class KafkaProducerInstrumentation extends Instrumenter.Default {
PRODUCER_DECORATE.afterStart(scope);
PRODUCER_DECORATE.onProduce(scope, record);
- callback = new ProducerCallback(callback, scope);
+ callback = new ProducerCallback(callback, scope.span());
// Do not inject headers for batch versions below 2
// This is how similar check is being done in Kafka client itself:
@@ -115,24 +116,25 @@ public final class KafkaProducerInstrumentation extends Instrumenter.Default {
public static class ProducerCallback implements Callback {
private final Callback callback;
- private final Scope scope;
+ private final Span span;
- public ProducerCallback(final Callback callback, final Scope scope) {
+ public ProducerCallback(final Callback callback, final Span span) {
this.callback = callback;
- this.scope = scope;
+ this.span = span;
}
@Override
public void onCompletion(final RecordMetadata metadata, final Exception exception) {
- PRODUCER_DECORATE.onError(scope, exception);
+ try (final Scope scope = GlobalTracer.get().scopeManager().activate(span, false)) {
+ PRODUCER_DECORATE.onError(span, exception);
try {
if (callback != null) {
callback.onCompletion(metadata, exception);
}
} finally {
- PRODUCER_DECORATE.beforeFinish(scope);
- scope.span().finish();
- scope.close();
+ PRODUCER_DECORATE.beforeFinish(span);
+ span.finish();
+ }
}
}
}

Handle Scope in Kafka producer properly

Holding onto scope in `Callback` is bad because that code may run on
different thread.