Date: Mon, 07 Jan 2008 17:02:05 -0800 From: Jin Guojun <jin@george.lbl.gov> To: kmacy@FreeBSD.org Cc: freebsd-bugs@FreeBSD.org Subject: Re: kern/37436: [hang] accept dead loop when out of file descriptors Message-ID: <4782CB8D.2040401@george.lbl.gov> In-Reply-To: <200711170119.lAH1Jokl048803@freefall.freebsd.org> References: <200711170119.lAH1Jokl048803@freefall.freebsd.org>
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kmacy@FreeBSD.org wrote: >Synopsis: [hang] accept dead loop when out of file descriptors > >State-Changed-From-To: open->feedback >State-Changed-By: kmacy >State-Changed-When: Sat Nov 17 01:19:37 UTC 2007 >State-Changed-Why: > >Is this still an issue? > >http://www.freebsd.org/cgi/query-pr.cgi?pr=37436 > > This is no longer an issue in both 6.x and 7.0, but some other harder problem comes up :-( I have not been able to determine what is the root yet, and keep digging right now. Brief description to new problem: When a large number of threads (around 1K) created to communicate to a remote server via TCP sockets, if data tranmitted per thread (probably caused by aggregated data) exceed a certain amount, the Tx session will hang. If Tx runs on a terminal session, the terminal hangs. Cannot kill the Tx process. Open another V console term is ok. If Tx runs on a Xterm, the entire X window hangs, although the Xclock is still ticking, but even a top program stops running on another xterm. Samba serve is dead. CTL-ALT-BS can kill X window, but no way to kill the hanging process, thus if testing this multiple times, system dies. Anyway, this is a different problem. Case 37436 can be closed, and thanks for all efforts. -Jin
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