Github user mwws commented on a diff in the pull request:
https://github.com/apache/spark/pull/8760#discussion_r40281631
--- Diff:
core/src/main/scala/org/apache/spark/scheduler/BlacklistStrategy.scala ---
@@ -0,0 +1,156 @@
+/*
+ * 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 scala.collection.mutable
+
+import org.apache.spark.Logging
+import org.apache.spark.SparkConf
+import org.apache.spark.util.SystemClock
+
+/**
+ * The interface to determine executor blacklist and node blacklist.
+ */
+trait BlacklistStrategy {
+ val expireTimeInMillisecond: Long
+
+ // TaskId is optional here because the BlacklistStrategy could be
unrelated to TaskId
--- End diff --
My original thinking was becasue (1) nodeBlacklist could depend on the
result of executorBlacklist (2) executorBlacklist might be taskId related ==>
then nodeBlacklist could also be taskId related. Your suggestion extinguish the
possibility to make nodeBlacklist taskId related. And In "speculate" mode, when
calling ```getExecutorBlacklist``` related to some taskId, we would like to
```getNodeBlacklist``` related to the same taskId.
Maybe we just keep both method with/without taskId to make the API more
extendable and provide additional layer of trait to simplify the implementation?
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