Github user zsxwing commented on a diff in the pull request: https://github.com/apache/spark/pull/12188#discussion_r58631336 --- Diff: core/src/main/scala/org/apache/spark/scheduler/cluster/CoarseGrainedSchedulerBackend.scala --- @@ -68,23 +75,26 @@ class CoarseGrainedSchedulerBackend(scheduler: TaskSchedulerImpl, val rpcEnv: Rp // Executors we have requested the cluster manager to kill that have not died yet; maps // the executor ID to whether it was explicitly killed by the driver (and thus shouldn't // be considered an app-related failure). + @GuardedBy("CoarseGrainedSchedulerBackend.this") private val executorsPendingToRemove = new HashMap[String, Boolean] // A map to store hostname with its possible task number running on it + @GuardedBy("CoarseGrainedSchedulerBackend.this") protected var hostToLocalTaskCount: Map[String, Int] = Map.empty // The number of pending tasks which is locality required + @GuardedBy("CoarseGrainedSchedulerBackend.this") protected var localityAwareTasks = 0 - // Executors that have been lost, but for which we don't yet know the real exit reason. - protected val executorsPendingLossReason = new HashSet[String] - // The num of current max ExecutorId used to re-register appMaster - protected var currentExecutorIdCounter = 0 + @volatile protected var currentExecutorIdCounter = 0 --- End diff -- This line is actually a bug fix.
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