ifplusor commented on a change in pull request #2983:
URL: https://github.com/apache/rocketmq/pull/2983#discussion_r730374895
##########
File path:
client/src/main/java/org/apache/rocketmq/client/impl/consumer/ConsumeMessageStagedConcurrentlyService.java
##########
@@ -179,15 +179,20 @@ public AtomicInteger getCurrentStageOffset(MessageQueue
messageQueue, String top
if (null == groupByStrategy) {
ConcurrentMap<String, ConcurrentMap<String, AtomicInteger>>
stageOffset = stageOffsetStore == null ?
new ConcurrentHashMap<>() :
convert(stageOffsetStore.readStageOffset(messageQueue,
ReadOffsetType.MEMORY_FIRST_THEN_STORE));
- currentStageOffsetMap.putIfAbsent(topic, stageOffset);
+ currentStageOffsetMap.put(topic, stageOffset);
groupByStrategy = currentStageOffsetMap.get(topic);
}
- ConcurrentMap<String, AtomicInteger> groups =
groupByStrategy.putIfAbsent(strategyId, new ConcurrentHashMap<>());
+ ConcurrentMap<String, AtomicInteger> groups =
groupByStrategy.get(strategyId);
if (null == groups) {
+ groupByStrategy.put(strategyId, new ConcurrentHashMap<>());
Review comment:
`putIfAbsent` is correct under concurrent.
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