MediatR并发调用抛出空引用异常

Question

我是MediatR的新手。对于并发调用，MediatR会为await next()调用抛出空引用异常。

这是我的代码。如果您需要更多信息，请与我们联系。

public class ValidatorBehaviour<TRequest, TResponse> : IPipelineBehavior<TRequest, TResponse> {
   ...     
   public ValidatorBehaviour(IValidator<TRequest>[] validators, ILogHandler logHandler) {
       _validators = validators;   _logger = logHandler;
   }

   public async Task<TResponse> Handle(TRequest request, RequestHandlerDelegate<TResponse> next) {
       var failures = ...

       if (failures.Any()) { 
           throw new Exception("some exception");
       }

       var response = await next();
       return response;
   }
}