MP FT does behave correctly in case when there is @Bulkhead, @Timeout and @Fallback and @Asynchronous on service method. Some of requests do not go to fallback method but end with InterruptedException.

Test scenario:

• Deploy MP FT service with:

      @Asynchronous
      @Bulkhead(value = 15, waitingTaskQueue = 15)
      @Timeout(value = 1000)
      @Fallback(fallbackMethod = "processFallback")
      public CompletionStage<MyConnection> bulkheadTimeout(boolean fail) throws InterruptedException {
          if (fail) {
              Thread.sleep(2000);
          }
          return CompletableFuture.completedFuture(new MyConnection() {
              @Override
              public String getData() {
                  return "Hello from @Bulkhead @Timeout method";
              }
          });
      }
  
      private CompletionStage<MyConnection> processFallback(boolean fail) {
          return CompletableFuture.completedFuture(new MyConnection() {
              @Override
              public String getData() {
                  return "Fallback Hello";
              }
          });
      }
  

• Send 10+ parallel requests with fail == true

Expected result:
All requests should go to fallback.

Actual Result:
Random number of requests (close to the number of requests) go to fallback.