Issue

• When a local system user is created on Red Hat Enterprise Linux 7, the command takes a long time if the server is using Active Directory to authenticate users.

• Same delay is not observed if unprivileged users are added to the local system.

  [root@rhel7-test-01 ~]# time useradd -r test1
  real    3m54.588s
  user    0m0.052s
  sys 0m0.080s
  
  [root@rhel7-test-01 ~]# time useradd test2
  real    0m0.615s
  user    0m0.016s
  sys 0m0.010s
  

• With the same configuration on RHEL6, we are not encountering this problem.
• We are seeing that some package installation via yum causing SSSD to fetch all users information and the installation time take too long to complete.