Github user srowen commented on a diff in the pull request: https://github.com/apache/spark/pull/17647#discussion_r111682983 --- Diff: core/src/main/scala/org/apache/spark/scheduler/SchedulableBuilder.scala --- @@ -181,23 +181,23 @@ private[spark] class FairSchedulableBuilder(val rootPool: Pool, conf: SparkConf) } override def addTaskSetManager(manager: Schedulable, properties: Properties) { - var poolName = DEFAULT_POOL_NAME - var parentPool = rootPool.getSchedulableByName(poolName) - if (properties != null) { - poolName = properties.getProperty(FAIR_SCHEDULER_PROPERTIES, DEFAULT_POOL_NAME) - parentPool = rootPool.getSchedulableByName(poolName) - if (parentPool == null) { - // we will create a new pool that user has configured in app - // instead of being defined in xml file - parentPool = new Pool(poolName, DEFAULT_SCHEDULING_MODE, - DEFAULT_MINIMUM_SHARE, DEFAULT_WEIGHT) - rootPool.addSchedulable(parentPool) - logWarning(s"A job was submitted with scheduler pool $poolName, which has not been " + - "configured. This can happen when the file that pools are read from isn't set, or " + - s"when that file doesn't contain $poolName. Created $poolName with default " + - s"configuration (schedulingMode: $DEFAULT_SCHEDULING_MODE, " + - s"minShare: $DEFAULT_MINIMUM_SHARE, weight: $DEFAULT_WEIGHT)") + var poolName = if (properties != null) { + properties.getProperty(FAIR_SCHEDULER_PROPERTIES, DEFAULT_POOL_NAME) + } else { + DEFAULT_POOL_NAME } + var parentPool = rootPool.getSchedulableByName(poolName) + if (parentPool == null && properties != null) { --- End diff -- No need to check properties for null?
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