[GitHub] [bookkeeper] HQebupt opened a new pull request, #3662: [fix][server]fix memory leak when operating ledger metadata

[GitBox]

HQebupt opened a new pull request, #3662:
URL: https://github.com/apache/bookkeeper/pull/3662

   ### Motivation
   There is memory lead in Bookkeeper client, see the following heap report:
   <img width="1007" alt="image" 
src="https://user-images.githubusercontent.com/4970972/203212033-09337cf0-afd1-4b0c-9ddf-3ba246e85849.png";>
   
   It happens when opening a non-existent or expired ledger data. The following 
screen shot is memeory leak point by [Eclipse Memory 
Analyzer](https://www.eclipse.org/mat/).
   <img width="799" alt="image" 
src="https://user-images.githubusercontent.com/4970972/203212114-d75cfcbc-f8d1-4880-977f-aa1847acb837.png";>
   
   
   ### Changes
   Handle exception and clean up when promise complete exceptionally.
   
   Master Issue: [#1](https://github.com/HQebupt/bookkeeper/pull/1)
   


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