After updating to RHEL 7.x, rpm and yum command fails with "Failed to initialize NSS library"

Solution Verified - Updated -

Issue

  • rpm and yum fail with "error: Failed to initialize NSS library"

    # rpm -qa
    error: Failed to initialize NSS library
    
    # rpm -Va
    error: Failed to initialize NSS library
    
    # yum update
    error: Failed to initialize NSS library
    There was a problem importing one of the Python modules
    required to run yum. The error leading to this problem was:
    
       cannot import name ts
    
    Please install a package which provides this module, or
    verify that the module is installed correctly.
    
    It's possible that the above module doesn't match the
    current version of Python, which is:
    2.7.5 (default, May  3 2017, 07:55:04) 
    [GCC 4.8.5 20150623 (Red Hat 4.8.5-14)]
    
    If you cannot solve this problem yourself, please go to 
    the yum faq at:
      http://yum.baseurl.org/wiki/Faq
    
    

Environment

  • Red Hat Enterprise Linux 7

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