Github user liyinan926 commented on a diff in the pull request:
https://github.com/apache/spark/pull/21366#discussion_r190953795
--- Diff:
resource-managers/kubernetes/core/src/main/scala/org/apache/spark/scheduler/cluster/k8s/ExecutorPodsLifecycleEventHandler.scala
---
@@ -0,0 +1,130 @@
+/*
+ * 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.cluster.k8s
+
+import java.util.concurrent.TimeUnit
+
+import com.google.common.cache.{Cache, CacheBuilder}
+import io.fabric8.kubernetes.api.model.Pod
+import io.fabric8.kubernetes.client.KubernetesClient
+import scala.collection.JavaConverters._
+
+import org.apache.spark.SparkConf
+import org.apache.spark.deploy.k8s.Config._
+import org.apache.spark.deploy.k8s.Constants._
+import org.apache.spark.internal.Logging
+import org.apache.spark.scheduler.ExecutorExited
+import org.apache.spark.util.Utils
+
+private[spark] class ExecutorPodsLifecycleEventHandler(
+ conf: SparkConf,
+ executorBuilder: KubernetesExecutorBuilder,
+ kubernetesClient: KubernetesClient,
+ podsEventQueue: ExecutorPodsEventQueue,
+ // Use a best-effort to track which executors have been removed
already. It's not generally
+ // job-breaking if we remove executors more than once but it's ideal
if we make an attempt
+ // to avoid doing so. Expire cache entries so that this data structure
doesn't grow beyond
+ // bounds.
+ removedExecutorsCache: Cache[java.lang.Long, java.lang.Long] =
--- End diff --
Can we put the default implementation in `object
ExecutorPodsLifecycleEventHandler`? I'm not sure if syntax-wise if that's
feasible, but it's pretty hard to read here.
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