[GitHub] jiangxinlingdu opened a new pull request #540: 更新并发创建mappedFile

Thu, 15 Nov 2018 17:13:31 -0800 

jiangxinlingdu opened a new pull request #540: 更新并发创建mappedFile
URL: https://github.com/apache/rocketmq/pull/540
 
 
   在CommitLog类中，putMessage的时候，
   
![image](https://user-images.githubusercontent.com/6373972/48544999-e02ab580-e8ff-11e8-81c3-ce43cdaf3303.png)
 当2个同时进入的时候，第一步的时候都是null，那么在第二步的时候，就创建了2个了，
   
![image](https://user-images.githubusercontent.com/6373972/48545051-fcc6ed80-e8ff-11e8-98fd-3c1404f560b3.png)，修改改问题bug
   
   

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