When installing Varnish Cache on CentOS 6.5 server, i got following error.

--> Finished Dependency Resolution
Error: Package: varnish-4.0.1-1.el6.x86_64 (varnish-4.0)
           Requires: libjemalloc.so.1()(64bit)
           Available: varnish-4.0.0-0.20140328beta1.el6.x86_64 (varnish-4.0)
               libjemalloc.so.1()(64bit)
           Available: varnish-4.0.0-1.el6.x86_64 (varnish-4.0)
               libjemalloc.so.1()(64bit)
           Available: varnish-4.0.0-0.20131129tp1.el6.x86_64 (varnish-4.0)
               Not found
           Installing: varnish-4.0.1-1.el6.x86_64 (varnish-4.0)
               Not found
Error: Package: varnish-4.0.1-1.el6.x86_64 (varnish-4.0)
           Requires: jemalloc
 You could try using --skip-broken to work around the problem
 You could try running: rpm -Va --nofiles --nodigest
[root@cl-208 httpd]# 

This is fixed by enabling EPEL repository.

rpm -ivh http://download.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm

Now install varnish with command

yum install varnish

It will work now.