mehakmeet commented on PR #5780:
URL: https://github.com/apache/hadoop/pull/5780#issuecomment-1617203652

   > No similar test for InputStream?
   
   So, InputStream doesn't actually use any threadpool passed from the FS 
instance so would be tricky to test that. But, Let me just add a test for 
checking back reference notNull, that should be enough I think.
   
   > Can we also handle filesystem.close() in the output stream by failing 
cleanly if the fs was explicitly closed()?
   
   @steveloughran Was thinking about this, so essentially whenever an 
Abfs.close() is closed we need to call the stream's close() as well, so that we 
can flush any remaining writes etc? Was thinking how this should be handled say 
mid way through a write, currently, I believe since the executor itself is shut 
down it just simply rejects any request incoming like this
   
   ```
   Could not submit task to executor 
java.util.concurrent.ThreadPoolExecutor@5c5e7584[Terminated, pool size = 0, 
active threads = 0, queued tasks = 0, completed tasks = 0]
   ```


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