Don't update node ip when peer fd is closed (#10696) #13216
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Cherry pick #10696 and solve the problem in the same way on branch '6.2'.
As discussed in #9351, @bjosv mentioned that the cluster node IP may be updated to ? when getpeername() fails due to some reasons like the fd is invalid somehow, and the log looks like:
Thx.
@enjoy-binbin @antirez