Setting SO_TIMEOUT on client socket channel

[chudak]

We aren't talking about the success rate of the deliveries...we are talking
about the client connection hanging indefinitely when it is not getting tcp
acks back from the server. We've found that in the case that we can setup
the tcp connection but the data packets are not getting through that tcp
will keep trying to retransmit every 2 minutes...and then the OS will
finally time the connection out after 15 minutes. This is much to long to
hang around with a failed connection.

We've found that if we set the SO_TIMEOUT on the underlying socket that it
correctly times out the connection if it can't read any data after the
timeout period. We are only able to do this because we had to extend the OIO
code to be able to inject a socket factory so we can handle SSL. To solve
the above we've also had to add another wrapper around our socket factories
that injects the SO_TIMEOUT, which is just another hack. It seems like this
should be supported by the framework.


Trustin Lee wrote:
> 
> As far as I know, SO_TIMEOUT does not affect the success rate of packet 
> deliveries. It just tells how soon socket read() should return before it 
> receives data so that the application can do something else till the 
> next read() attempt.
> 
> Netty uses SO_TIMEOUT internally to check if there is any pending 
> setInterestOps() request every second.
> 
> HTH
> 
> chudak wrote:
>  > There doesn't appear to be any way to do this. We can set the connect 
> timeout
>  > by using the options method of the client bootstrap, e.g.:
>  >
>  > bootstrap.setOption("connectTimeoutMillis", 30);
>  >
>  > We can also set other socket options, e.g.:
>  >
>  > bootstrap.setOption("tcpNoDelay", true);
>  >
>  > We are running our netty client on a mobile device and in low network
>  > coverage situations where we are getting lots of packet loss,
> especially
>  > during the SSL handshake, the connection hangs indefinitely.
>  >
>  > Any reason this isn't supported, especially for OIO?
>  >
>  >
>  >
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