Polish

spring-boot-actuator/src/main/java/org/springframework/boot/actuate/health/CompositeReactiveHealthIndicator.java

@@ -93,8 +93,10 @@ public class CompositeReactiveHealthIndicator implements ReactiveHealthIndicator
 	@Override
 	public Mono<Health> health() {
 		return Flux.fromIterable(this.indicators.entrySet())
-				.flatMap((entry) -> Mono.just(entry.getKey())
-						.zipWith(entry.getValue().health().compose(this.timeoutCompose)))
+				.flatMap((entry) -> Mono.zip(
+						Mono.just(entry.getKey()),
+						entry.getValue().health().compose(this.timeoutCompose))
+				)
 				.collectMap(Tuple2::getT1, Tuple2::getT2)
 				.map(this.healthAggregator::aggregate);
 	}