Github user kayousterhout commented on a diff in the pull request: https://github.com/apache/spark/pull/14079#discussion_r92103550 --- Diff: yarn/src/main/scala/org/apache/spark/deploy/yarn/YarnAllocator.scala --- @@ -217,18 +219,35 @@ private[yarn] class YarnAllocator( * @param localityAwareTasks number of locality aware tasks to be used as container placement hint * @param hostToLocalTaskCount a map of preferred hostname to possible task counts to be used as * container placement hint. + * @param nodeBlacklist a set of blacklisted nodes, which is passed in to avoid allocating new + * containers on them. It will be used to update the application master's + * blacklist. * @return Whether the new requested total is different than the old value. */ def requestTotalExecutorsWithPreferredLocalities( requestedTotal: Int, localityAwareTasks: Int, - hostToLocalTaskCount: Map[String, Int]): Boolean = synchronized { + hostToLocalTaskCount: Map[String, Int], + nodeBlacklist: Set[String]): Boolean = synchronized { this.numLocalityAwareTasks = localityAwareTasks this.hostToLocalTaskCounts = hostToLocalTaskCount if (requestedTotal != targetNumExecutors) { logInfo(s"Driver requested a total number of $requestedTotal executor(s).") targetNumExecutors = requestedTotal + + // Update blacklist infomation to YARN ResouceManager for this application, + // in order to avoid allocating new Containers on the problematic nodes. + val blacklistAdditions = nodeBlacklist -- currentNodeBlacklist + val blacklistRemovals = currentNodeBlacklist -- nodeBlacklist + if (blacklistAdditions.nonEmpty) { + logInfo(s"adding nodes to blacklist: $blacklistAdditions") --- End diff -- can you add "YARN application master" here and below? (so "adding nodes to YARN application master's blacklist: $...") (to differentiate clearly from the app-level blacklisting used elsewhere)
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