Github user ericl commented on a diff in the pull request:
https://github.com/apache/spark/pull/13152#discussion_r72685380
--- Diff: core/src/main/scala/org/apache/spark/storage/BlockManager.scala
---
@@ -159,8 +162,27 @@ private[spark] class BlockManager(
blockTransferService.init(this)
shuffleClient.init(appId)
+ val topologyInfo = {
+ val topologyStr =
master.getTopologyInfo(blockTransferService.hostName)
+ if (topologyStr == null || topologyStr.isEmpty) {
+ None
+ } else {
+ Some(topologyStr)
+ }
+ }
+
+ blockReplicationPrioritizer = {
+ val priorityClass = conf.get(
+ "spark.replication.topologyawareness.prioritizer",
+ "org.apache.spark.storage.DefaultBlockReplicationPrioritization")
+ val clazz = Utils.classForName(priorityClass)
+ val ret =
clazz.newInstance.asInstanceOf[BlockReplicationPrioritization]
+ logInfo(s"Using $priorityClass for prioritizing peers")
+ ret
+ }
+
blockManagerId = BlockManagerId(
- executorId, blockTransferService.hostName, blockTransferService.port)
+ executorId, blockTransferService.hostName,
blockTransferService.port, topologyInfo)
--- End diff --
Would it work if topologyInfo was sent back from the master when
`registerBlockManager` is called? It doesn't seem that anything uses
`blockManagerId` until registration finishes. That way we wouldn't need this
weird two-step registration.
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