构造函数无法实例化为所需的类型；找到：(T1，T2，T3，T4，T5)

Question

我是spark-graphx和scala的新手。我编写此方法来验证球门顶点的得分是否已更改。

 def IsGoalVertexFound(graph: Graph[(VertexId,(Int,Float,Float,Float,String)),Float],goalVertex:(VertexId,(Int,Float,Float,Float))): Boolean ={
        var IsgoalFound:Boolean=false
        var targetVertex=graph.vertices.filter{ case (id,(_,gScore,_,_,_)) => id == goalVertex._1 && gScore!=Float.PositiveInfinity}
          if(targetVertex.isEmpty())
            IsgoalFound=true
        return IsgoalFound
      }

我得到了这个错误：

Error:(41, 54) constructor cannot be instantiated to expected type;
 found   : (T1, T2, T3, T4, T5)
 required: (org.apache.spark.graphx.VertexId, (Int, Float, Float, Float, String))
    (which expands to)  (Long, (Int, Float, Float, Float, String))
    var targetVertex=graph.vertices.filter{ case (id,(_,gScore,_,_,_)) => id == goalVertex._1 && gScore!=Float.PositiveInfinity}

有什么想法吗？非常感谢

Answer 1

这看起来像是序列化错误。尝试将goalVertex._1参数提取到局部变量中，这样VertexId就不会被序列化：

def IsGoalVertexFound(graph: Graph[(VertexId,(Int,Float,Float,Float,String)),Float],goalVertex:(VertexId,(Int,Float,Float,Float))): Boolean ={
    var IsgoalFound:Boolean=false
    val localGoal = goalVertex._1
    var targetVertex=graph.vertices.filter{ case (id,(_,gScore,_,_,_)) => id == localGoal && gScore!=Float.PositiveInfinity}
      if(targetVertex.isEmpty())
        IsgoalFound=true
    return IsgoalFound
 }

Answer 2

我尝试了以下解决方案，它工作正常：

 def IsGoalVertexFound(graph: Graph[(VertexId,(Int,Float,Float,Float,String)),Float],goalVertex:(VertexId,(Int,Float,Float,Float))): Boolean ={
    var IsgoalFound:Boolean=false
    var targetVertex=graph.vertices.filter{ case (id,attr) => id == goalVertex._1 && attr._2._2!=Float.PositiveInfinity}.first()
     // if(targetVertex.isEmpty())
      //  IsgoalFound=true
    return IsgoalFound
  }