[FWTools] FWTools 1.0.0a7 Problems on Linux

[Bryan Keith]

Ed et al,

Hmmm.  This could be my problem as well.  I sent a couple e-mails to 
this list (12/1/05 and 12/6/05), and I didn't get any replies.

When I try to copy a dataset with gdal_translate, the tool hangs but not 
(when I've checked) with 100% CPU usage.  Sometimes the tool will finish 
with Segmentation fault.

I updated from FWTools-linux-1.0.0a1 to FWTools-linux-1.0.0a7, but that 
didn't change the problem.

Here's my RH info:

$ cat /proc/version
Linux version 2.4.20-8smp (bhcompile at porky.devel.redhat.com) (gcc 
version 3.2.2 20030222 (Red Hat Linux 3.2.2-5)) #1 SMP Thu Mar 13 
17:45:54 EST 2003
$

Ed, it sounds like I should upgrade to RH ES 4, Update 2, right?  Do the 
symptoms I've having sound like the same problem that you fixed with the 
upgrade?

Bryan

Bryan Keith
GIS Specialist
Geomega, Inc.
Boulder, CO, USA

Ed McNierney wrote:

>Frank et al. -
>
>A few weeks ago I reported some problems with FWTools 1.0.0a7 running on
>my Red Hat ES 3 systems.  Frank generously spent some time looking into
>it, and I've been working on the problems on and off ever since.  I
>don't know much, but here's what I do know (or think I know):
>
>1. The problems seem to be GDAL-based, popping up in tools using GDAL.
>I particularly ran into trouble working with GeoTIFF data sets, but
>that's really all I was testing on so I can't say whether these seemed
>to be GeoTIFF-specific.  Tools would hang with 100% CPU use, or crash.
>
>2. Various debug tools gave me reason to suspect libtiff and/or the
>compiler runtime libraries.  RH ES 3 ships with libtiff 3.5 which might
>have been a problem.  However, I upgraded various TIFF and related
>libraries, then selected compiler libraries, then finally upgraded the
>whole compiler suite to 3.4.5.  Nothing fixed the problem.
>
>3. I then put FWTools on a back burner and did a refresh and rebuild of
>my MapServer source tree, including GDAL and its utilities.  I continued
>to have exactly the same problems.
>
>4. Since I was going to do it anyway, and since Frank suspected problems
>with "older Red Hat" systems, I upgraded to RH EL 4, Update 2.  This
>made the problems go away, and all the tools work fine.
>
>Unfortunately, I don't know what the problem really was and I can't
>continue to investigate now that it's "fixed".  But I'd add this data to
>the belief that RH ES 3 (and perhaps other releases) may be troublesome,
>while RH ES 4, Update 2, seems to work fine.
>
>At the same time I also reported that the link to the FWTools
>distribution had a typo and linked to a file ending in ".tar.tar"
>instead of ".tar.gz"  When I tried later that day (on a different
>system) the problem had already been "fixed".  I have since discovered
>that there is something wrong with my browser on one particular machine,
>and it was that browser that was mangling the filename (it does it to
>anything ending in ".tar.gz".  There actually wasn't (and isn't) any
>problem on the FWTools site at all.
>
>Thanks to Frank for the help!
>
>	- Ed
>
>Ed McNierney
>President and Chief Mapmaker
>TopoZone.com / Maps a la carte, Inc.
>73 Princeton Street, Suite 305
>North Chelmsford, MA  01863
>Phone: +1 (978) 251-4242
>Fax: +1 (978) 251-1396
>ed at topozone.com
>
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