Github user kayousterhout commented on a diff in the pull request:
https://github.com/apache/spark/pull/4708#discussion_r26595137
--- Diff: core/src/main/scala/org/apache/spark/scheduler/ResultStage.scala
---
@@ -0,0 +1,41 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.scheduler
+
+import org.apache.spark.rdd.RDD
+import org.apache.spark.util.CallSite
+
+private[spark] class ResultStage(
+ override val id: Int,
+ override val rdd: RDD[_],
+ override val numTasks: Int,
+ override val parents: List[Stage],
+ override val jobId: Int,
+ override val callSite: CallSite)
+ extends Stage(id, rdd, numTasks, parents, jobId, callSite) {
+
+ /**
+ * For stages that are the final (consists of only ResultTasks), links
to the active job for
+ * this results stage.
+ */
+ var resultOfJob: Option[ActiveJob] = None
+
+ override def toString: String = "ResultStage " + id
+
+ override def isAvailable: Boolean= true
--- End diff --
It looks like isAvailable is only used for shuffleMapStages (and in one log
statement, which can just be changed). Make it a property only of
ShuffleMapStage?
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