Github user mxm commented on the pull request:
https://github.com/apache/flink/pull/992#issuecomment-130222078
Actually point 3 is not so bad because we're using a buffered reader that
fills the buffer and does not read a character from the socket on every call to
`read()`.
The `read()` method may throw an Exception or return -1. So we need to
handle both of these cases. If closed properly, the socket should send the EOF
event and the `read()` method returns -1.
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