areyouok commented on a change in pull request #3639:
URL: https://github.com/apache/rocketmq/pull/3639#discussion_r768311983
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File path:
client/src/main/java/org/apache/rocketmq/client/producer/RequestFutureHolder.java
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@@ -37,19 +38,13 @@
private static final RequestFutureHolder INSTANCE = new
RequestFutureHolder();
private ConcurrentHashMap<String, RequestResponseFuture>
requestFutureTable = new ConcurrentHashMap<String, RequestResponseFuture>();
private final AtomicInteger producerNum = new AtomicInteger(0);
Review comment:
there is no need use AtomicInteger.
I suggest change to HashSet《DefaultMQProducerImpl》 and
startScheduledTask/shutdown support re-entry.
eg: called DefaultMQProducerImpl.shutdown got exception, and the user may
call shutdown again.
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