Github user sryza commented on a diff in the pull request: https://github.com/apache/spark/pull/4141#discussion_r23564546 --- Diff: yarn/src/main/scala/org/apache/spark/deploy/yarn/YarnAllocator.scala --- @@ -192,15 +186,32 @@ private[yarn] class YarnAllocator( } /** - * Request numExecutors additional containers from YARN. Visible for testing. + * Update the set of container requests that we will sync with the RM based on the number of + * executors we have currently running and our target number of executors. + * + * Visible for testing. */ - def addResourceRequests(numExecutors: Int): Unit = { - for (i <- 0 until numExecutors) { - val request = new ContainerRequest(resource, null, null, RM_REQUEST_PRIORITY) - amClient.addContainerRequest(request) - val nodes = request.getNodes - val hostStr = if (nodes == null || nodes.isEmpty) "Any" else nodes.last - logInfo("Container request (host: %s, capability: %s".format(hostStr, resource)) + def updateResourceRequests(): Unit = { --- End diff -- `YarnAllocator` is already `private[yarn]`, so this will end up `private[yarn]` already.
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