Github user zsxwing commented on a diff in the pull request:
https://github.com/apache/spark/pull/12188#discussion_r58631408
--- 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
class DriverEndpoint(override val rpcEnv: RpcEnv, sparkProperties:
Seq[(String, String)])
extends ThreadSafeRpcEndpoint with Logging {
+ // Executors that have been lost, but for which we don't yet know the
real exit reason.
+ protected val executorsPendingLossReason = new HashSet[String]
--- End diff --
Move this into `DriverEndpoint` so that it's easy to know it's only
accessed by `receive/receiveAndReply`
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