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Description of problem: When NetworkManager service is stopped, nmcli hangs in multiple situations after raising an exception to stdout. Such a hang is very unpleasant for tools or scripts running nmcli command and expecting (prompt) output. Version-Release number of selected component (if applicable): NetworkManager-0.8.1-66.el6.x86_64 How reproducible: 100% Steps to Reproduce: 1. service NetworkManager stop 2. nmcli con status 3. nmcli con show 4. nmcli con --help 5. nmcli con whateverWrong Actual results: commands 2. to 5. hung after raising: ** (process:18982): WARNING **: get_all_cb: couldn't retrieve system settings properties: (2) The name org.freedesktop.NetworkManagerSystemSettings was not provided by any .service files. ** (process:18982): WARNING **: fetch_connections_done: error fetching system connections: (2) The name org.freedesktop.NetworkManagerSystemSettings was not provided by any .service files. Expected results: Commands should not hung. Additional info:
nmcli only hangs when neither NetworkManager nor nm-applet is running. NetworkManager 0.8 (in RHEL 6) has two setting services supplying connections: one is NetworkManager itself handling system connections, and the other is a user service handling user connections - usually nm-applet. From NetworkManager 0.9 upwards all connections are managed by NetworkManager itself. Also note that nmcli commands in RHEL6 differ from RHEL7. For example: List all connections: nmcli con [show] - RHEL7 nmcli con list [user | system] - RHEL6 Active connections: nmcli con show -a - RHEL7 nmcli con status - RHEL6 But, of course, the nmcli freeze is a bug and I will post a patch to fix it.
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://rhn.redhat.com/errata/RHBA-2015-1257.html