OK, we're running 32 bit CentOS 4.2, on Xeon processors. I'm thinking there's some problem with the newer glibc or something like that, which would also explain the crashes I was having at first on a specific map?
J.F. -----Original Message----- From: UMN MapServer Users List [mailto:[EMAIL PROTECTED] On Behalf Of Doyon, Jean-Francois Sent: March 3, 2006 9:56 AM To: [email protected] Subject: Re: [UMN_MAPSERVER-USERS] MapServer incompatibility with RHEL4/CE NTOS4.2 Lowell, Indeed! These are 64 bit CPU's! (Intel Xeon, Dell PowerEdge 1850's) And we're running CentOS, though I'm not sure whether it's the i386 version, or the x86_64 one, I'll look into that. I've also replicated the problem on a Pentium 4 machine though, which is 32 bit, though with what intel calls EM64T technology. Could it be the HyperThreading? J.F. -----Original Message----- From: Lowell.Filak [mailto:[EMAIL PROTECTED] Sent: March 3, 2006 9:41 AM To: Doyon, Jean-Francois Cc: [email protected] Subject: Re: [UMN_MAPSERVER-USERS] MapServer incompatibility with RHEL4/CENTOS4.2 Doyon, Jean-Francois writes: > Hello, > > OK well I've tracked down the source of my problem to the operating > system itself it seems. > > Regardless of the versions/combinations of mapserver/gd/freetype I > use, there are definite visual rendering problems when on this OS. On > RedHat 7.3, everything is fine! > > Example: > > http://atlas.gc.ca/family-good.gif > http://atlas.gc.ca/family-bad.gif > > Note the small dot that appears on the symbol? > > Also: > > http://atlas.gc.ca/the-market-good.gif > http://atlas.gc.ca/the-market-bad.gif > > Notice how on the bad version, a bunch of point symbols are missing? > > I tried various combinations of: > > MapServer 4.6.1 and 4.8.1 > FreeType 2.0.9 and 2.1.9 > GD 2.0.28 and 2.0.33 > > A given combination works on 7.3, but not on CentOS. > > Without luck. The problem with the strange shape of the symbols ( > http://atlas.gc.ca/mapserver-symbol-problem.png ) seemes to be related > to the version of FreeType for some reason? FreeType 2.0.9 acts as we > expect it to, FreeType 2.1.9 does not. There may be cumulative > effects also. > > CentOS 4.2 uses GCC 3.4.4 and GLIBC 2.3.4. I had gotten a horrible > crash message at some point with a version of mapserver on this OS > (http://lists.umn.edu/cgi-bin/wa?A2=ind0602&L=mapserver-users&P=R60802 > &I=-3& X=106ECE1CAE6B73E23F), but upgrading from 4.6.1 to 4.8.1 had > fixed it. This was related to memory allocation. Could something > related to that be causing this? Turns out I've got 4.6.1 running on > this platform now, but that really didn't help. > > I'm out of ideas :( Anyone? J.F., Is the 7.3 box a 32-bit and the RHEL box a 64-bit kernel by any chance (you may have already stated that in your previous "double free detected.." post but I don't remember). Not that I know of a particular fix, but we have certainly had strange problems here also. Lowell
