Adapt to the latest Reactor

Author: artembilan

spring-integration-core/src/main/java/org/springframework/integration/channel/FluxMessageChannel.java

@@ -82,7 +82,8 @@ public void subscribeTo(Publisher<Message<?>> publisher) {
 		ConnectableFlux<?> connectableFlux =
 				Flux.from(publisher)
 						.handle((message, sink) -> sink.next(send(message)))
-						.onErrorContinue()
+						.onErrorContinue((throwable, o) -> logger.warn("Error during processing event: " + o, throwable)
+						)
 						.doOnComplete(() -> this.publishers.remove(publisher))
 						.hide() // TODO remove after upgrade to Reactor 3.1.9.RELEASE or later
 						.publish();