我使用graphx創建了一個圖形,現在我需要從原始圖形中提取子圖形。 users_graph是具有索引給用戶的子圖的RDD。問題是這些子圖沒有被計算出來。當我試圖對這些子圖進行操作時,我得到一個java.lang.NullPointerException異常。使用graphx構建的圖形沒有得到正確的廣播
class VertexProperty(val id:Long) extends Serializable
case class User(val userId:Long, var offset:Int, val userCode:String, val Name:String, val Surname:String, val organizational_unit:String, val UME:String, val person_type:String, val SOD_HIGH:String, val SOD_MEDIUM:String, val SOD_LOW:String, val Under_mitigated:String) extends VertexProperty(userId)
case class Account(val accountId:Long, var offset:Int, val userCode:String, val userId:String, val account_creation_date:String, var disabled:String, var forcechangepwd:String, var pwdlife:String, var numberloginerror:String, var lastchangepwd:String, var lastlogin:String, var lastwronglogin:String, var state:String, var expire:String, var last_cert_time:String, var creation_date:String, var creation_user:String,var challenge_counter:String, var challenge_failed_attempt:String) extends VertexProperty(accountId) //Check if userCode is actually the code in this example.
case class Application(var applicationId:Long, var offset:Int, var Name:String, var Description:String, var Target:String, var Owner:String, var Ownercode:String, var Creation_date:String, var Creation_user:String) extends VertexProperty(applicationId)
case class Entitlement(val entitlementId:Long, var offset:Int, val Name:String, var Code:String, var Description:String, var Type:String, var Application:String, var Administrative:String, var Parent_ID:String, var Owner_code:String, var Scope_type:String, var Business_name:String, var Business_policy:String, var SOD_high:String, var SOD_medium:String, var SOD_low:String) extends VertexProperty(entitlementId)
/*
Some code for computing vertexRDD and edges
*/
val graph: Graph[VertexProperty,String] = Graph(vertexRDD, edges, new VertexProperty(-1))
val triplets = graph.triplets
val temp = triplets.map(t => t.attr)
val distinct_users = temp.distinct.filter(t => t != "NULL")
var bcast_graph = sc.broadcast(graph)
val users_graph = distinct_users.map(du => du -> bcast_graph.value.subgraph(epred = t => t.attr == du))
此外,我試過這個, val user_graph = bcast_graph.value.subgraph(epred = t => t.attr ==「273」)//「273」是一個用戶標識。 這給了我想要的輸出。我不知道爲什麼我在使用地圖功能時沒有獲得輸出。 –
我不明白你爲什麼要廣播。一個'Graph',因爲它是由'RDDs'組成的,它的性質是平行的。你認爲你用'sc.broadcast(graph)'完成了什麼? –
我想在地圖功能中使用構造圖。因此,我需要在那裏使用之前播放它。我錯過了什麼? –