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unable to open the console

Unable to open VM console, when i open the console of instance vm console not come, it does not showing anything. every service of openstack working fine except novncproxy it shows error. and when novncproxy service able to run this console will come.

[root@controller ~]# service openstack-nova-novncproxy status
openstack-nova-novncproxy dead but pid file exists

In /var/log/messgages

Feb 17 15:32:42 controller abrt: detected unhandled Python exception in '/usr/bin/nova-novncproxy'
Feb 17 15:32:42 controller abrtd: New client connected
Feb 17 15:32:42 controller abrtd: Directory 'pyhook-2017-02-17-15:32:42-26030' creation detected
Feb 17 15:32:42 controller abrt-server[26039]: Saved Python crash dump of pid 26030 to /var/spool/abrt/pyhook-2017-02-17-15:32:42-26030
Feb 17 15:32:42 controller abrtd: Package 'openstack-nova-novncproxy' isn't signed with proper key
Feb 17 15:32:42 controller abrtd: 'post-create' on '/var/spool/abrt/pyhook-2017-02-17-15:32:42-26030' exited with 1
Feb 17 15:32:42 controller abrtd: Deleting problem directory '/var/spool/abrt/pyhook-2017-02-17-15:32:42-26030'
Feb 17 15:39:23 controller proxy-server: Invalid user token - deferring reject downstream
Feb 17 17:04:31 controller proxy-server: Invalid user token - deferring reject downstream
Feb 17 17:04:32 controller proxy-server: Invalid user token - deferring reject downstream
Feb 17 17:04:33 controller proxy-server: Invalid user token - deferring reject downstream

earlier every thing is working fine this error come unexpectedly. kindly help to sort it out.

unable to open the console

Unable to open VM console, when i open the console of instance vm console not come, it does not showing anything. every service of openstack working fine except novncproxy it shows error. and when novncproxy service able to run this console will come.

[root@controller ~]# service openstack-nova-novncproxy status
openstack-nova-novncproxy dead but pid file exists

In /var/log/messgages

Feb 17 15:32:42 controller abrt: detected unhandled Python exception in '/usr/bin/nova-novncproxy'
Feb 17 15:32:42 controller abrtd: New client connected
Feb 17 15:32:42 controller abrtd: Directory 'pyhook-2017-02-17-15:32:42-26030' creation detected
Feb 17 15:32:42 controller abrt-server[26039]: Saved Python crash dump of pid 26030 to /var/spool/abrt/pyhook-2017-02-17-15:32:42-26030
Feb 17 15:32:42 controller abrtd: Package 'openstack-nova-novncproxy' isn't signed with proper key
Feb 17 15:32:42 controller abrtd: 'post-create' on '/var/spool/abrt/pyhook-2017-02-17-15:32:42-26030' exited with 1
Feb 17 15:32:42 controller abrtd: Deleting problem directory '/var/spool/abrt/pyhook-2017-02-17-15:32:42-26030'
Feb 17 15:39:23 controller proxy-server: Invalid user token - deferring reject downstream
Feb 17 17:04:31 controller proxy-server: Invalid user token - deferring reject downstream
Feb 17 17:04:32 controller proxy-server: Invalid user token - deferring reject downstream
Feb 17 17:04:33 controller proxy-server: Invalid user token - deferring reject downstream
Feb 20 12:40:49 controller proxy-server: Configuring auth_uri to point to the public identity endpoint is required; clients may not be able to authenticate against an admin endpoint
Feb 20 12:40:49 controller proxy-server: Using /tmp/keystone-signing-7OZ5Zi as cache directory for signing certificate
Feb 20 12:40:49 controller proxy-server: Using /tmp/keystone-signing-JFNDVS as cache directory for signing certificate
Feb 20 12:40:49 controller proxy-server: Starting keystone auth_token middleware
Feb 20 12:40:49 controller proxy-server: Configuring admin URI using auth fragments. This is deprecated, use 'identity_uri' instead.
Feb 20 12:40:49 controller proxy-server: Configuring auth_uri to point to the public identity endpoint is required; clients may not be able to authenticate against an admin endpoint
Feb 20 12:40:49 controller proxy-server: Using /tmp/keystone-signing-8MrAUw as cache directory for signing certificate

earlier every thing is working fine this error come unexpectedly. kindly help to sort it out.