Github user mgummelt commented on a diff in the pull request:
https://github.com/apache/spark/pull/11157#discussion_r59632164
--- Diff:
core/src/main/scala/org/apache/spark/scheduler/cluster/mesos/CoarseMesosSchedulerBackend.scala
---
@@ -75,6 +75,13 @@ private[spark] class CoarseMesosSchedulerBackend(
val coresByTaskId = new HashMap[String, Int]
var totalCoresAcquired = 0
+ // Ports acquired so far
+ // SlaveID -> ports
+ val takenPortsPerSlave = new mutable.HashMap[String, List[Long]]
--- End diff --
Why keep track of this? Mesos won't re-offer ports that have already been
allocated?
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