Github user zsxwing commented on a diff in the pull request:
https://github.com/apache/spark/pull/10440#discussion_r48302701
--- Diff:
core/src/main/scala/org/apache/spark/scheduler/cluster/mesos/MesosClusterScheduler.scala
---
@@ -126,7 +125,7 @@ private[spark] class MesosClusterScheduler(
private val retainedDrivers = conf.getInt("spark.mesos.retainedDrivers",
200)
private val maxRetryWaitTime =
conf.getInt("spark.mesos.cluster.retry.wait.max", 60) // 1 minute
private val schedulerState = engineFactory.createEngine("scheduler")
- private val stateLock = new ReentrantLock()
--- End diff --
It's not necessary to use `ReentrantLock` here since we only use
`synchronized`
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