From nobody@FreeBSD.org  Fri Aug 19 16:05:00 2011
Return-Path: <nobody@FreeBSD.org>
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 0F7761065680
	for <freebsd-gnats-submit@FreeBSD.org>; Fri, 19 Aug 2011 16:05:00 +0000 (UTC)
	(envelope-from nobody@FreeBSD.org)
Received: from red.freebsd.org (red.freebsd.org [IPv6:2001:4f8:fff6::22])
	by mx1.freebsd.org (Postfix) with ESMTP id F32CE8FC17
	for <freebsd-gnats-submit@FreeBSD.org>; Fri, 19 Aug 2011 16:04:59 +0000 (UTC)
Received: from red.freebsd.org (localhost [127.0.0.1])
	by red.freebsd.org (8.14.4/8.14.4) with ESMTP id p7JG4xbl092459
	for <freebsd-gnats-submit@FreeBSD.org>; Fri, 19 Aug 2011 16:04:59 GMT
	(envelope-from nobody@red.freebsd.org)
Received: (from nobody@localhost)
	by red.freebsd.org (8.14.4/8.14.4/Submit) id p7JG4xCu092458;
	Fri, 19 Aug 2011 16:04:59 GMT
	(envelope-from nobody)
Message-Id: <201108191604.p7JG4xCu092458@red.freebsd.org>
Date: Fri, 19 Aug 2011 16:04:59 GMT
From: markham breitbach <markham_breitbach@ssimicro.com>
To: freebsd-gnats-submit@FreeBSD.org
Subject: inter-jail communication failure
X-Send-Pr-Version: www-3.1
X-GNATS-Notify:

>Number:         159918
>Category:       kern
>Synopsis:       [jail] inter-jail communication failure
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-jail
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:  
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Fri Aug 19 16:10:10 UTC 2011
>Closed-Date:    
>Last-Modified:  Sat Aug 20 04:10:25 UTC 2011
>Originator:     markham breitbach
>Release:        FreeBSD 8.1-RELEASE
>Organization:
>Environment:
FreeBSD kimmirut-pd1.qiniq.com 8.1-RELEASE FreeBSD 8.1-RELEASE #0: Mon Jul 19 02:55:53 UTC 2010     root@almeida.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC  i386

>Description:
We run a system with two jails operating different services in very
remote locations.  Each jail is assigned a unique routable IP address.

Intermittently, we lose power unexpectedly and backup batteries drain
before we can get the servers shut down cleanly.

Occasionally after the servers come back up, we cannot connect to the
services provided by jail2 from jail1.

The jails are quite minimal, containing the files necessary to run the
services and very little else.  Any suggestions to further diagnose this
problem would greatly be appreciated.
>How-To-Repeat:
We cannot repeat this problem on the bench, but his happens in the field
every few months.
>Fix:
The solution to the problem is not always consistent.

Sometimes the solution is as simple as flushing the arp cache.

Sometimes the dance is a bit more complicated and involves unaliasing
the addresses from the interface, flushing the route and arp caches and
re-aliasing the interface IP. (and restarting the services)



>Release-Note:
>Audit-Trail:
Responsible-Changed-From-To: freebsd-bugs->freebsd-jail 
Responsible-Changed-By: linimon 
Responsible-Changed-When: Sat Aug 20 04:09:27 UTC 2011 
Responsible-Changed-Why:  
Over to maintainer(s). 

http://www.freebsd.org/cgi/query-pr.cgi?pr=159918 
>Unformatted:
