BEA-000438

:####<Apr 4, 2011 2:11:56 PM CST> <Error> <Socket> <ydcrh07> <myserver> <barEDIJobProcessor0-0> <<anonymous>> <> <BEA-000438> <Unable to load performance pack. Using Java I/O instead. Please ensure that libmuxer library is in :'/opt/j2sdk1.4.2_05/jre/lib/i386/server:/opt/j2sdk1.4.2_05/jre/lib/i386:/opt/j2sdk1.4.2_05/jre/../lib/i386:/opt/bea816/weblogic81/server/lib/linux/x86_64:/opt/bea816/weblogic81/server/lib/linux/x86_64/oci920_8'
wl-domain.log:####<Apr 4, 2011 2:16:08 PM CST> <Error> <Kernel> <ydcrh07> <myserver> <ExecuteThread: '0' for queue: 'weblogic.kernel.System'> <<WLS Kernel>> <> <BEA-000802> <ExecuteRequest failed
Solution:

Please help add below in
/opt/bea816/weblogic81//server/bin/startWLS.sh

LINUX|Linux)
arch='uname -m'
if [ "${arch}" = "x86_64" ]; then
arch=i686
fi

http://download.oracle.com/docs/cd/E13196_01/platform/suppconfigs/configs81/rhelinux40as_es_em64t/81sp6.html