advancedxy commented on code in PR #470:
URL: https://github.com/apache/incubator-uniffle/pull/470#discussion_r1070780483
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client/src/main/java/org/apache/uniffle/client/impl/ShuffleWriteClientImpl.java:
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@@ -246,6 +259,12 @@ public SendShuffleDataResult sendShuffleData(String appId,
List<ShuffleBlockInfo
// which is minimum number when there is at most *replicaWrite - replica*
sending server failures.
for (ShuffleBlockInfo sbi : shuffleBlockInfoList) {
List<ShuffleServerInfo> allServers = sbi.getShuffleServerInfos();
+ if (replica > 1 && !shuffleServerBlacklist.isEmpty()) {
+ // We can't modify allServers directly, because allServers is shared
and is not thread safe
+ List<ShuffleServerInfo> newServerList = new ArrayList<>(allServers);
Review Comment:
This is a critical path and we are paying `copying the shuffle server then
reordering the shuffle server` for every shuffle send request. Is it possible
leverage the `shuffleServerBlackList` in the `genServerToBlocks` method?
P.S.: to be more inclusive, we may replace `shuffleServerBlackList` to
`shuffleServerBlockList`.
##########
client/src/main/java/org/apache/uniffle/client/impl/ShuffleWriteClientImpl.java:
##########
@@ -311,6 +330,17 @@ public SendShuffleDataResult sendShuffleData(String appId,
List<ShuffleBlockInfo
return new SendShuffleDataResult(successBlockIds, failedBlockIds);
}
+ @VisibleForTesting
+ void moveBlacklistServersToTheEnd(List<ShuffleServerInfo> serverInfos) {
Review Comment:
I noticed that some unit test refers this method. If possible, I would like
to make this method a static one: `static
moveBlacklistServersToTheEnd(List<ShuffleServerInfo> serverInfos,
Set<ShuffleServerInfo> shuffleServerBlockList)`, and unit test this method.
However, if you refactor the `genServerToBlocks`, this method might be
removed.
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