Victsm commented on a change in pull request #29855:
URL: https://github.com/apache/spark/pull/29855#discussion_r503408196
##########
File path:
common/network-shuffle/src/main/java/org/apache/spark/network/shuffle/ExternalBlockHandler.java
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@@ -373,6 +427,54 @@ public ManagedBuffer next() {
}
}
+ /**
+ * Dummy implementation of merged shuffle file manager. Suitable for when
push-based shuffle
+ * is not enabled.
+ */
+ private static class NoOpMergedShuffleFileManager implements
MergedShuffleFileManager {
+
+ @Override
+ public StreamCallbackWithID receiveBlockDataAsStream(PushBlockStream msg) {
+ throw new UnsupportedOperationException("Cannot handle shuffle block
merge");
+ }
+
+ @Override
+ public MergeStatuses finalizeShuffleMerge(FinalizeShuffleMerge msg) throws
IOException {
+ throw new UnsupportedOperationException("Cannot handle shuffle block
merge");
+ }
+
+ @Override
+ public void registerApplication(String appId, String user) {
+ throw new UnsupportedOperationException("Cannot handle shuffle block
merge");
+ }
+
+ @Override
+ public void registerExecutor(String appId, String[] localDirs) {
+ // No-Op. Do nothing.
+ }
+
+ @Override
+ public void applicationRemoved(String appId, boolean cleanupLocalDirs) {
+ throw new UnsupportedOperationException("Cannot handle shuffle block
merge");
Review comment:
This API is right now only invoked by YarnShuffleService during YARN
application shutdown sequence.
Making this a no-op is more generic in case we could potentially invoke this
API from other places down the way.
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