From: Urabe Shyouhei <shyouhei@...>
Date: 2011-08-02T08:42:03+09:00
Subject: [ruby-core:38676] Re: [Ruby 1.9 - Bug #5138][Open] Add nonblocking IO that does not use exceptions for EOF and EWOULDBLOCK

(08/02/2011 08:35 AM), Eric Wong wrote:
> Urabe Shyouhei <shyouhei@ruby-lang.org> wrote:
>> (08/02/2011 08:14 AM), Eric Wong wrote:
>>> Urabe Shyouhei <shyouhei@ruby-lang.org> wrote:
>>>> So when you  do a read loop,  nothing bothers you, as long  as you use
>>>> readpartial.
>>>
>>> That use of select + readpartial is unsafe.
>>
>> Unsafe how?  readpatial works even without no data on a buffer.
> 
> readpartial will block if there's no data readable, potentially freezing
> the whole process.

Yes but that's not catastrophic.  The peer side is sending a data anyway.
Checksum incorrect packets are dropped but retransmitted sooner or later.
The process blocks during that retransmission.  That won't last so long.