sarthfrey commented on a change in pull request #27395: [SPARK-30667][CORE] Add
allGather method to BarrierTaskContext
URL: https://github.com/apache/spark/pull/27395#discussion_r378010218
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File path: core/src/main/scala/org/apache/spark/BarrierCoordinator.scala
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@@ -173,7 +204,18 @@ private[spark] class BarrierCoordinator(
requesters: ArrayBuffer[RpcCallContext],
numTasks: Int): Boolean = {
if (requesters.size == numTasks) {
- requesters.foreach(_.reply(()))
+ if (requestMethodToSync == RequestMethod.BARRIER) {
+ requesters.foreach(_.reply(""))
+ }
+ else if (requestMethodToSync == RequestMethod.ALL_GATHER) {
+ val jsonArray = JArray(
+ allGatherMessages.map(
+ (msg) => JString(msg)
+ ).toList
+ )
+ val json: String = compact(render(jsonArray))
Review comment:
Primarily because for users using the Python API, we must deserialize the
result in the python on the python side in `taskcontext.py` after it reads the
result from the socket file in the `load_from_socket` function. Is there a
different serialization scheme you would recommend?
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