Uncaught exception thrown by HttpRequestInvokerImpl.invoke() causes main thread to "hang"

[SylarChen]

Describe the bug
on servlet async mode, uncatched exception throwed from graphql.kickstart.servlet.HttpRequestInvokerImpl.invoke() will "hang" the main thread, till servlet timeout.

To Reproduce

1. construct a bad data input to let graphql validation failed. in other words, construct any uncatched exception throwed from graphql.kickstart.servlet.HttpRequestInvokerImpl.invoke()
2. we will see the error printed on console immediately
3. client get the data till servlet timeout. and the error msg is about timeout not the exception we made.

Expected behavior
client get the precise exception information immediately.

Screenshots

Version:

• graphql.java 17.3
• graphql.java.kickstart.servlet 12.0.0

Additional context
maybe some code like this

    configuration
        .getAsyncExecutor()
        .execute(
            () -> {
                  try{
                        FutureExecutionResult futureResult = invoke(invocationInput, request, response);
                        futureHolder.set(futureResult);
                        handle(futureResult, request, response, listenerHandler)
                            .thenAccept(it -> asyncContext.complete());
                  }catch(Exception){
                        // write result & apply RequestCallback ...
                  }
            });