Github user squito commented on a diff in the pull request:
https://github.com/apache/spark/pull/8760#discussion_r40231455
--- Diff:
yarn/src/main/scala/org/apache/spark/deploy/yarn/YarnAllocator.scala ---
@@ -184,13 +188,21 @@ private[yarn] class YarnAllocator(
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 Container on the problematic
nodes.
+ val blacklistAdditions = nodeBlacklist -- currentNodeBlacklist
+ val blacklistRemovals = currentNodeBlacklist -- nodeBlacklist
+ amClient.updateBlacklist(blacklistAdditions.toList,
blacklistRemovals.toList)
--- End diff --
this is great, I had no idea this was possible and was wondering how to
solve the interaction with yarn here. nice find :)
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