summaryzb commented on code in PR #1260:
URL:
https://github.com/apache/incubator-uniffle/pull/1260#discussion_r1369755721
##########
client/src/main/java/org/apache/uniffle/client/impl/ShuffleWriteClientImpl.java:
##########
@@ -355,16 +354,36 @@ public SendShuffleDataResult sendShuffleData(
}
}
/** Records the ShuffleServer that successfully or failed to send blocks */
- Map<Long, List<ShuffleServerInfo>> blockIdSendSuccessTracker =
JavaUtils.newConcurrentMap();
- Map<Long, List<ShuffleServerInfo>> blockIdsSendFailTracker =
JavaUtils.newConcurrentMap();
+ // we assume that most of the blocks can be sent successfully
+ // so initialize the map at first without concurrency insurance
+ // AtomicInteger is enough to reflect value changes in other threads
+ Map<Long, AtomicInteger> blockIdsSendSuccessTracker = Maps.newHashMap();
Review Comment:
No concurrency issues, since `blockIdsSendSuccessTracker` is already
initialize with all blockIds, it will not be modified in other thread.
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