kgio_trywrite raises "Broken pipe - send (Errno::EPIPE)"

["Iñaki Baz Castillo" <ibc@aliax.net>]

Hi, I've realized that in certain cases Kgio::TCPSocket#kgio_trywrite
raises a "Broken pipe - send (Errno::EPIPE)" exception.

In my test case, I use Kgio::TCPSocket within EventMachine (using
EM.watch and so).

- Open the connection (*persistent* connection).

- Send a SIP request (like HTTP) to my custom server which replies a
SIP response.

- When "any data" is received (maybe not the entire SIP response since
I use kgio_tryread(40) for testing purposes) I send a *new* SIP
request.

- This means that, at some point, I send much more data than the received one.

- If when reading the received data with kgio_tryread(XXX), XXX is
equal or greater than the SIP response size, then there is no issue
and it works forever.

- But if XXX is less that the SIP response size, then at some point I
get an exception when calling to  Kgio::TCPSocket#kgio_trywrite:

    "Broken pipe - send (Errno::EPIPE)"


I assume this is since the TCP buffer is filled due to the above
"strange" test case. So I wonder, shouldn't kgio_trywrite return
:error_epipe? :)

-- 
Iñaki Baz Castillo
<ibc@aliax.net>