Github user CodingCat commented on a diff in the pull request: https://github.com/apache/spark/pull/731#discussion_r12511545 --- Diff: core/src/main/scala/org/apache/spark/deploy/master/Master.scala --- @@ -466,30 +466,14 @@ private[spark] class Master( * launched an executor for the app on it (right now the standalone backend doesn't like having * two executors on the same worker). */ - def canUse(app: ApplicationInfo, worker: WorkerInfo): Boolean = { - worker.memoryFree >= app.desc.memoryPerSlave && !worker.hasExecutor(app) + private def canUse(app: ApplicationInfo, worker: WorkerInfo): Boolean = { + worker.memoryFree >= app.desc.memoryPerExecutor && !worker.hasExecutor(app) && + worker.coresFree > 0 --- End diff -- yes, but this function is only called when we want to schedule a single executor to a certain worker
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