[Mono-dev] TCP Async

Greg Young gregoryyoung1 at gmail.com
Wed Jun 27 13:23:06 UTC 2012

Trying to get it into a testcase has been very difficult unfortunately
we only really see it at saturation levels and not commonly. Seems
like some kind of internal race condtion.

Are the begin/end calls more stable and preferable at this time?

On Wed, Jun 27, 2012 at 9:14 AM, Rodrigo Kumpera <kumpera at gmail.com> wrote:
> We've been aware of such issues, could you file a bug and attach a test case
> with it please?
> This would really really help us fix it.
> On Wed, Jun 27, 2012 at 4:08 AM, Greg Young <gregoryyoung1 at gmail.com> wrote:
>> We are experiencing an issue with async behaviours in sockets (with
>> SendAsync/callback not Begin/End).
>> Our visible issue is that when in a send loop we will fail on our
>> heartbeats. After debugging and counting calls into/out of
>> SendAsync/callback we see that we are inside of a call to SendAsync
>> (eg: it never returns, in our case for 10 seconds before we declare
>> the socket dead). We can duplicate this fairly regularly on
>> mac/bsd/linux though its nonconsistent (sometimes it may happen
>> repeatedly other times it works fine). The code does not have such
>> issues on MS CLR. We are also running on loopback so its unlikely that
>> an underlying network problem is causing the hang up. The code itself
>> is fairly straight forward (not that different than the MS example of
>> the API except that its fully async (separate send/receive loops while
>> the example is request/response))
>> I am pulling sources now to build latest but does anyone happen to
>> know of known issues with this sort of thing?
>> Cheers,
>> Greg
>> --
>> Le doute n'est pas une condition agréable, mais la certitude est absurde.
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Le doute n'est pas une condition agréable, mais la certitude est absurde.

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