[GitHub] [rocketmq] dongeforever commented on pull request #470: Upgrade JDK dependency and code clean based on the features of JDK 1.8

[GitHub]

@ConeyLiu why you polish createTopicInSendMessageBackMethod and skip 
createTopicInSendMessageMethod? 

[ Full content available at: https://github.com/apache/rocketmq/pull/470 ]
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