Github user tnachen commented on a diff in the pull request: https://github.com/apache/spark/pull/4027#discussion_r38496861 --- Diff: core/src/main/scala/org/apache/spark/scheduler/cluster/mesos/CoarseMesosSchedulerBackend.scala --- @@ -357,30 +380,34 @@ private[spark] class CoarseMesosSchedulerBackend( * slave IDs that we might have asked to be killed. It also notifies the driver * that an executor was removed. */ - private def executorTerminated(d: SchedulerDriver, slaveId: String, reason: String): Unit = { + private def executorTerminated( + d: SchedulerDriver, + executorId: String, + slaveId: String, + reason: String): Unit = { stateLock.synchronized { - if (slaveIdsWithExecutors.contains(slaveId)) { - val slaveIdToTaskId = taskIdToSlaveId.inverse() - if (slaveIdToTaskId.containsKey(slaveId)) { - val taskId: Int = slaveIdToTaskId.get(slaveId) - taskIdToSlaveId.remove(taskId) - removeExecutor(sparkExecutorId(slaveId, taskId.toString), reason) + if (slaveIdsWithExecutors.contains(slaveId) && taskIdToSlaveId.contains(executorId)) { + taskIdToSlaveId.remove(executorId) + removeExecutor(executorId, reason) + val newCount = slaveIdsWithExecutors(slaveId) - 1 + if (newCount == 0) { + slaveIdsWithExecutors.remove(slaveId) + } else { + slaveIdsWithExecutors(slaveId) = newCount } - // TODO: This assumes one Spark executor per Mesos slave, - // which may no longer be true after SPARK-5095 - pendingRemovedSlaveIds -= slaveId - slaveIdsWithExecutors -= slaveId } } } - private def sparkExecutorId(slaveId: String, taskId: String): String = { - s"$slaveId/$taskId" - } - override def slaveLost(d: SchedulerDriver, slaveId: SlaveID): Unit = { logInfo(s"Mesos slave lost: ${slaveId.getValue}") - executorTerminated(d, slaveId.getValue, "Mesos slave lost: " + slaveId.getValue) + // Terminate all executors in the slave + stateLock.synchronized { + val lostExecutors = taskIdToSlaveId.filter(_._2.equals(slaveId.getValue)).map(_._1) + lostExecutors.foreach { taskId => + executorTerminated(d, taskId, slaveId.getValue, "Mesos slave lost: " + slaveId.getValue) + } + } } override def executorLost(d: SchedulerDriver, e: ExecutorID, s: SlaveID, status: Int): Unit = { --- End diff -- You're right, I've updated it now.
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