Oracle Enterprise Linux 6.x and later do not, by default install the 32-bit versions of the glibc libraries. You need to install the libraries in order to install DataStax Enterprise.
To install glibc on Oracle Linux:
Make the yum.repos.d your current directory.
Download the public-yum-ol6.repo package from the repository.
Check that glibc.i686 is ready for installation and install it.
yum list yum install glibc.i686