fjpanag commented on PR #6956:
URL: https://github.com/apache/incubator-nuttx/pull/6956#issuecomment-1232114674

   > If you don't close the socket by self, and unplug the netdev without 
CONFIG_NETDOWN_NOTIFIER, nobody can notify you. Does the problem disappear 
without this patch?
   
   The socket will soon try to send data and it will fail. This will call 
`close()`.
   
   I have added logs and I monitor the usage of `close()` and 
`tcp_close_eventhandler()`. I can assure you that when the first one is called 
the second one may **not** be called.
   
   The problem with the stuck thread only happened once, using this patch. I am 
trying hard, but I haven't found a way to reproduce it.


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