scala – 如何利用Play2.1框架中的SLF4J varargs登录？

Logger log = LoggerFactory.getLogger( getClass() );
log.debug( "Hello,{}.  The current time is {}","robert",new Date() );

试图在Play 2.1 Framework / Scala中做这个简单的例子,我遇到编译器拒绝我.

import play.api._
import play.api.mvc._
import org.slf4j.LoggerFactory

object Application extends Controller {
  val log: org.slf4j.Logger = LoggerFactory.getLogger(getClass())

  def hb = Action {
    val message = makeMessage()
    // COMPILER HATES THIS:  ambiguous reference compiler error here
    log.info("Hello {}.  The current time is {}",new java.util.Date() )
    Ok(message)
  }
  def makeMessage(): String = { return "stuff" }
}

[dm2-server] $compile
[info] Compiling 2 Scala sources to /Users/bobk/work/dm2-server/target/scala-2.10/classes...
[error] /Users/bobk/work/dm2-server/app/controllers/Application.scala:16: ambiguous reference to overloaded definition,[error] both method info in trait Logger of type (x$1: String,x$2: <repeated...>[Object])Unit
[error] and  method info in trait Logger of type (x$1: String,x$2: Any,x$3: Any)Unit
[error] match argument types (String,String,java.util.Date)
[error]     log.info("Hello {}.  The current time is {}",new java.util.Date() )
[error]         ^
[error] one error found
[error] (compile:compile) Compilation failed
[error] Total time: 1 s,completed Jun 6,2013 10:54:41 AM

这是什么错误,我如何克服它来调用SLF4J API？如果我不能这样做,我如何使用Play 2.1 Logging Framework来获取日志记录调用的变量？ Scala-land中有些东西不对.