Java Vertx WebClient is not printing log from onSuccess, onFailure, onComplete method but receiving response

Question

I am trying to perform a http call using Java vertx. Below is my sample code which I am using to perform a http post call. After executing this code, I can receive the response but log messages which is written inside onsuccess or onFailure(when failure occur) or onComplete methods are not printing. Kindly help me to rectify the issue here.

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WebClient httpClient; VertxOptions vertxOption = new VertxOptions() .setBlockedThreadCheckInterval(config.getBlockedThreadCheckInterval()) .setBlockedThreadCheckIntervalUnit(TimeUnit.SECONDS) .setMaxEventLoopExecuteTime(config.getMaxEventLoopExecutionTime()) .setMaxEventLoopExecuteTimeUnit(TimeUnit.SECONDS) .setWarningExceptionTime(config.getWarningExecutionTime()) .setWarningExceptionTimeUnit(TimeUnit.SECONDS) .setMaxWorkerExecuteTime(config.getMaxWorkerExecutionTime()) .setMaxWorkerExecuteTimeUnit(TimeUnit.SECONDS); //.setWorkerPoolSize(config.getPoolSize());

      WebClientOptions options = new WebClientOptions();          options
          .setName(config.getVertxName())
          .setConnectTimeout(config.getHttpConnectionTimeout() * 1000)
          .setTrustAll(config.isHttpTrustAll())
          .setKeepAlive(config.isHttpKeepAlive())
              .setIdleTimeout(config.getHttpConnectionTimeout())
              .setHttp2KeepAliveTimeout(config.getHttpConnectionTimeout())
              .setMaxPoolSize(config.getPoolSize());
          Vertx vertx = Vertx.vertx(vertxOption)
                  .exceptionHandler(Throwable::printStackTrace);

      try{
          httpClient = WebClient.create(vertx, options);

      } catch (Exception e) {
          log.error("Error while starting vertx client {0} ",e.getCause());

      } httpClient
          .postAbs("http://localhost:8080/traveldetails/enquery")
          .expect(ResponsePredicate.SC_SUCCESS)           .as(BodyCodec.pipe(new KryoStreamWriter<>(consumer, latch)))            .sendBuffer(buffer)
      .onSuccess(res->{
          future.complete("Future Complete");
          log.info("success response....................");           })          .onFailure(frc->{
          log.error("failure response");
          log.error("Error : {}", frc.getCause());
          future.completeExceptionally(new Throwable("Error occur in vertx"));

      }).onComplete(asyncResult ->{
          System.out.println("Status value "+asyncResult.result().statusCode());
          if(asyncResult.succeeded())
              log.info("On Complete............................ and status code {}", asyncResult.result().statusCode());
          else
              log.error("Failed to get complete the request {} ", asyncResult.result().statusCode());

          latch.countDown();          });

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