Hello Pratima, Slightly peripheral to the main thread, the remedy for your problem reminds me of one that some of us had years ago. FTX implemented https://www.ietf.org/rfc/rfc1323.txt section 3.2 wrongly, with 16 bit timestamps. The symptom was that, when the 16-bit timestamps rolled over, all of the incoming packets at the other (linux) end would be filtered out, and the connection would stall and then break. Would you know if your counterparty was doing something like that? Regards, James. On Sun, Apr 21, 2013 at 7:00 AM, <darwin-kernel-request@lists.apple.com> wrote: <snip>

Message: 3 Date: Fri, 19 Apr 2013 13:31:12 -0700 From: Pratima Kudale <Pratima.Kudale@harmonicinc.com> To: Steven Bytnar <smbapplelists@bytnar.net>, Andreas Fink <afink@list.fink.org> Cc: "darwin-kernel@lists.apple.com" <darwin-kernel@lists.apple.com> Subject: RE: kernel lockup Message-ID: <7C241BA63C456C419F2697F2529576B12DFA53E339@EXCH-CMS.hlit.local> Content-Type: text/plain; charset=us-ascii

Andreas,

Are you seeing this issue only on 10.8.3? Or is it reproducible on any 10.8 version?

I am sharing my experience here. We are also running into n/w stack hang issue, I have bug 13138492 open for it.

And I also posted kernel stack trace for hang on this mailing list in January: http://prod.lists.apple.com/archives/darwin-kernel/2013/Jan/msg00007.html

If in case you are running into similar issue: Setting net.link.generic.system.flow_advisory to zero helped to get rid of hang. But it affects n/w performance significantly. Hence, we are still waiting for actual solution from apple on this.

See if this helps you. Please update once you receive any solution / workaround for the issue that you are experiencing here.

Thanks, Pratima

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