[GitHub] [incubator-ratis] runzhiwang opened a new pull request #90: RATIS-925. Fix Memory leak of RaftServerImpl for no remove from static RaftServerMetrics::metricsMap

Tue, 05 May 2020 22:53:42 -0700 


runzhiwang opened a new pull request #90:
URL: https://github.com/apache/incubator-ratis/pull/90


   **What's the problem ?**
   As the image shows, there are 2066 instances of RaftServerImpl, most of them 
are Closed, and should be GC, but actually not.
   
![image](https://user-images.githubusercontent.com/51938049/81141951-bc9a7580-8fa0-11ea-9516-f0fb38067113.png)
   
   **What's the reason ?**
   You can find from the image 2040 RaftServerImpl were held by 
RaftServerMetrics::metricsMap which is a staic map 
   
![image](https://user-images.githubusercontent.com/51938049/81141965-c7eda100-8fa0-11ea-95f7-841981576bca.png)
   


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