Github user dragos commented on a diff in the pull request: https://github.com/apache/spark/pull/8653#discussion_r39018872 --- Diff: core/src/test/scala/org/apache/spark/scheduler/cluster/mesos/MesosSchedulerBackendSuite.scala --- @@ -42,6 +42,38 @@ import org.apache.spark.{LocalSparkContext, SparkConf, SparkContext, SparkFunSui class MesosSchedulerBackendSuite extends SparkFunSuite with LocalSparkContext with MockitoSugar { + test("Use configured mesosExecutor.cores for ExecutorInfo") { + val mesosExecutorCores = 3 + val conf = new SparkConf + conf.set("spark.mesos.mesosExecutor.cores", mesosExecutorCores.toString) + + val listenerBus = mock[LiveListenerBus] + listenerBus.post( + SparkListenerExecutorAdded(anyLong, "s1", new ExecutorInfo("host1", 2, Map.empty))) + + val sc = mock[SparkContext] + when(sc.getSparkHome()).thenReturn(Option("/spark-home")) + + when(sc.conf).thenReturn(conf) + when(sc.executorEnvs).thenReturn(new mutable.HashMap[String, String]) + when(sc.executorMemory).thenReturn(100) + when(sc.listenerBus).thenReturn(listenerBus) + val taskScheduler = mock[TaskSchedulerImpl] + when(taskScheduler.CPUS_PER_TASK).thenReturn(2) + + val mesosSchedulerBackend = new MesosSchedulerBackend(taskScheduler, sc, "master") + + val resources = Arrays.asList( + mesosSchedulerBackend.createResource("cpus", 4), + mesosSchedulerBackend.createResource("mem", 1024)) + // uri is null. + val (executorInfo, _) = mesosSchedulerBackend.createExecutorInfo(resources, "test-id") + val executorResources = executorInfo.getResourcesList + val cpus = executorResources.asScala.find(_.getName == "cpus").get.getScalar.getValue --- End diff -- Oh, I see. I can do that. Do you know why `equals` is preferred? `==` is safe w.r.t. to nulls, so we assume `getName` (and all other getters, like `getContainerPath`) never return `null`?
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