A.P. Lawrence

Best of the Newsgroups: Kernel exception trap

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From: tony@aplawrence.com
Subject: Re: Why does the system hungs?
Date: Sun, 8 Jun 2003 10:34:39 +0000 (UTC) References: <q5qar-m6c.ln1@news.warblade.dyndns.org>

T. E. <pelegrine@hotmail.com> wrote:
: Hello there,

: has anybody out there an idea, why the system hungs during execution of the
: script with an Kernel Error (or Kernel Exeption ... not quite sure anymore
: how its called ...):
:     #!/bin/sh
:     #
:     DATADIR=/FTS/DATEN/21
:     WORKDIR=/q8/tmas/WEAT

(script deleted)

: I tested that script on an linux machine, and it worked fine.
: The SCO OpenServer 5.0.5 system just hungs .... :(
: It starts transfering data, and stops during doing so - simply hungs, with
: an screen showing info of the memorydump, and saying "Now its safe to
: shut-off the system, or reboot by pressing any key" (or something like
: that).

Ordinarily the phrase "or something like that" will engender severe
and well deserved chastisement.  If you want help with a problem,
it behooves you to describe said problem accurately and the make
the effort to transcribe error messages precisely.

In this case, we know what you mean (you have a trap message), but you 
have left out the most important piece of information:  exactly what the trap 
number is.

The most common trap seen is E, which is explained at 
http://aplawrence.com/Unixart/trape.html

However, you might be seeing a panic that included something like
"PANIC: HTFS: Free block freed on HTFS" or similar language indicating
that a block already on the free list was found in an inode being 
freed.  That would be HTFS file system corruption, fixable by 
a single-user fsck -ofull and on some systems preventable by
proper patches.  The reason I suspect something like this is
that you only mention this happening during a certain script, 
which might mean that it is a particular file that causes the problem.

Or you might be seeing something else entirely that could indicate 
adaptor driver problems.

But there's no point in me or anyone else guessing: make it happen 
again and this time write it all down completely.

You mighrt also read http://aplawrence.com/newtosco.html#newsg for
advice on how to ask a better question here.

--  
tony@aplawrence.com Unix/Linux resources: http://aplawrence.com
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