LuciferYang commented on PR #49531:
URL: https://github.com/apache/spark/pull/49531#issuecomment-2597486129

   It seems that this code path does not have sufficient test coverage. I added 
a log statement in the `closeAndRead` method and then conducted tests on the 
`network-shuffle` and `core` modules locally. I found that: 
   
   
   1. The tests in the `network-shuffle` module do not cover this code path;
   2.There are a few test cases in the `core` module that indirectly cover this 
path (such as some test cases in `DistributedSuite`),  but it is not easy to 
add new assertions. 
   
   So, could you add a targeted test case in this pull request? @ChenMichael  
Thanks ~


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