yum update command failed with "NSS: client certificate not found (nickname not specified)" with a local yum repository configured on httpd.

Solution Verified - Updated -

Issue

  • When executing a command yum update or yum check-update, I'd expect to connect to an internal YUM repository server. But, I'm getting the following error.

    [Errno 14] problem making ssl connection
    
  • With export URLGRABBER_DEBUG=1;yum update, I got the following output.

    NSS: client certificate not found (nickname not specified)
    NSS error -12227
    

Environment

  • Red Hat Enterprise Linux 6

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