From: Sev Binello Subject: Re: executables crash when moved Date: Wed, 15 Feb 2006 16:29:53 -0500 Message-ID: <43F39D51.5010803@bnl.gov> References: <43F36BD6.7010408@bnl.gov> <1140031915.7888.35.camel@lade.trondhjem.org> Mime-Version: 1.0 Content-Type: text/html; charset=us-ascii Cc: nfs@lists.sourceforge.net Return-path: Received: from sc8-sf-mx2-b.sourceforge.net ([10.3.1.92] helo=mail.sourceforge.net) by sc8-sf-list2.sourceforge.net with esmtp (Exim 4.30) id 1F9UDp-0005uJ-VH for nfs@lists.sourceforge.net; Wed, 15 Feb 2006 13:30:01 -0800 Received: from smtpgw.bnl.gov ([130.199.3.132] helo=smtpgateway.bnl.gov ident=SMTP) by mail.sourceforge.net with esmtps (TLSv1:AES256-SHA:256) (Exim 4.44) id 1F9UDo-0007D1-Gs for nfs@lists.sourceforge.net; Wed, 15 Feb 2006 13:30:02 -0800 To: Trond Myklebust In-Reply-To: <1140031915.7888.35.camel@lade.trondhjem.org> Sender: nfs-admin@lists.sourceforge.net Errors-To: nfs-admin@lists.sourceforge.net List-Unsubscribe: , List-Id: Discussion of NFS under Linux development, interoperability, and testing. List-Post: List-Help: List-Subscribe: , List-Archive: Trond Myklebust wrote:

On Wed, 2006-02-15 at 12:58 -0500, Sev Binello wrote:

We have had a consistent problem of executables shared over NFS crashing
when new executables are released.

    Before a new executable replaces an older one with a cp,
    we mv the executable to a fallback dir and rename it.
    We have 2 renaming schemes,
    either .old, .older, .oldest or  append a date to the old executable.
   
    This used to work fine when the nfs sever was solaris,
    however since we migrated it to redhat linux WS,
    we find that the executables crash with a SIGBUS.
   
    The executables don't necessarily crash right away,
    as a matter of fact we can't intentionally reproduce the crash.
    Which leads me to believe it is cache related.


It isn't. It is a consequence of using the (admittedly _very_ stupid)
default server setting of "subtree_check", and then renaming into a
different directory (man 5 exports).

You have one of 2 possible solutions:

 1) Edit your /etc/exports, and add no_subtree_check options to the
entries for your exported filesystem.

OR

 2) rename the executables into the same directory.

Cheers,
  Trond

Many, many .... many thanks !

-Sev

-- 

Sev Binello
Brookhaven National Laboratory
Upton, New York
631-344-5647
sev@bnl.gov

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