Oracle Linux 7.1 to higher version update not working

Hallo All,

Actually doing update my system OL 7.1 to higher version ,but im getting fallowing error..

[root@<REMOVED> yum.repos.d]# yum update

Geladene Plugins: langpacks

https://yum.oracle.com/repo/OracleLinux/OL7/UEKR4/x86_64/repodata/repomd.xml: [Errno 14] curl#35 - "Encountered end of file"

Anderer Spiegelserver wird versucht.

No packages marked for update

---------------------------------------------------------------------------------------

actual kernel version..

[root@<REMOVED> yum.repos.d]# uname -r

3.8.13-98.2.2.el7uek.x86_64

[root@<REMOVED> yum.repos.d]# cat /etc/os-release

NAME="Oracle Linux Server"

VERSION="7.1"

ID="ol"

VERSION_ID="7.1"

PRETTY_NAME="Oracle Linux Server 7.1"

ANSI_COLOR="0;31"

CPE_NAME="cpe:/o:oracle:linux:7:1"

HOME_URL="