I run "strace -o 1.log yum update"...
[root@nf ~]# ldd /usr/lib64/python2.6/lib-dynload/pyexpat.so
/usr/lib64/python2.6/lib-dynload/pyexpat.so: /u01/app/oracle/product/11.2.0/dbhome_1/lib/libexpat.so.1: no version information available (required by /usr/lib64/python2.6/lib-dynload/pyexpat.so)
linux-vdso.so.1 => (0x00007fff67b25000)
libexpat.so.1 => /u01/app/oracle/product/11.2.0/dbhome_1/lib/libexpat.so.1 (0x00007f8f9a94e000)
libpython2.6.so.1.0 => /usr/lib64/libpython2.6.so.1.0 (0x00007f8f9a589000)
libpthread.so.0 => /lib64/libpthread.so.0 (0x00007f8f9a36c000)
libc.so.6 => /lib64/libc.so.6 (0x00007f8f99fda000)
libdl.so.2 => /lib64/libdl.so.2 (0x00007f8f99dd5000)
libutil.so.1 => /lib64/libutil.so.1 (0x00007f8f99bd2000)
libm.so.6 => /lib64/libm.so.6 (0x00007f8f9994e000)
/lib64/ld-linux-x86-64.so.2 (0x00007f8f9ac8c000)
I think my problem caused with /u01/app/oracle/product/11.2.0/dbhome_1/lib/libexpat.so.1.
When I can change library for /usr/lib64/python2.6/lib-dynload/pyexpat.so to /lib64/libexpat.so.1?
Sorry for my english.