mridulm commented on a change in pull request #27313: [SPARK-29148][CORE] Add
stage level scheduling dynamic allocation and scheduler backend changes
URL: https://github.com/apache/spark/pull/27313#discussion_r375445487
##########
File path:
core/src/main/scala/org/apache/spark/scheduler/cluster/CoarseGrainedSchedulerBackend.scala
##########
@@ -69,27 +69,17 @@ class CoarseGrainedSchedulerBackend(scheduler:
TaskSchedulerImpl, val rpcEnv: Rp
conf.get(SCHEDULER_MAX_REGISTERED_RESOURCE_WAITING_TIME))
private val createTimeNs = System.nanoTime()
- private val taskResourceNumParts: Map[String, Int] =
- if (scheduler.resourcesReqsPerTask != null) {
- scheduler.resourcesReqsPerTask.map(req => req.resourceName ->
req.numParts).toMap
- } else {
- Map.empty
- }
-
// Accessing `executorDataMap` in the inherited methods from
ThreadSafeRpcEndpoint doesn't need
// any protection. But accessing `executorDataMap` out of the inherited
methods must be
// protected by `CoarseGrainedSchedulerBackend.this`. Besides,
`executorDataMap` should only
// be modified in the inherited methods from ThreadSafeRpcEndpoint with
protection by
// `CoarseGrainedSchedulerBackend.this`.
private val executorDataMap = new HashMap[String, ExecutorData]
- // Number of executors requested by the cluster manager,
[[ExecutorAllocationManager]]
- @GuardedBy("CoarseGrainedSchedulerBackend.this")
- private var requestedTotalExecutors = 0
-
- // Number of executors requested from the cluster manager that have not
registered yet
+ // Number of executors for each ResourceProfile requested by the cluster
+ // manager, [[ExecutorAllocationManager]]
@GuardedBy("CoarseGrainedSchedulerBackend.this")
- private var numPendingExecutors = 0
Review comment:
I am still trying to understand the implications of removal of
numPendingExecutors ... just wanted to confirm in meantime if there are no side
effects of it.
Is it getting handled elsewhere ?
The main place where it was earlier getting used was when there was a
mismatch in expected counts which resulted in killing executors - that is
prevented now ?
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