Just checked in the logs, the region is not actually dead after the exception
Apr 9 18:56:51 swoobat regiond[1297846]: TypeError: sequence item 0: expected str instance, ConnectionLost found Apr 9 18:56:51 swoobat regiond[1297846]: regiond: [info] 127.0.0.1 POST /MAAS/api/2.0/machines/ HTTP/1.1 --> 500 INTERNAL_SERVER_ERROR (referrer: -; agent: Python-httplib2/0.20.2 (gzip)) Apr 9 18:57:07 swoobat maas-log[1302692]: maas.interface: [info] eno1 (physical) on swoobat: New MAC, IP binding observed: 14:02:ec:3e:e1:78, 10.244.40.159 Apr 9 18:57:07 swoobat maas-log[1302692]: Apr 9 18:56:46 meinfoo maas.rpc.rackcontrollers: [info] Existing rack controller 'swoobat' running version 3.5.0~rc9-16269-g.8ccfdc1b0 has connected to region 'meinfoo'. Apr 9 18:57:07 swoobat maas-log[1302692]: Apr 9 18:57:07 meinfoo maas.interface: [info] eno1 (physical) on meinfoo: New MAC, IP binding observed: 14:02:ec:3e:e1:78, 10.244.40.159 Apr 9 18:57:07 swoobat maas-log[1302692]: Apr 9 18:57:07 leafeon maas.interface: [info] eno1 (physical) on leafeon: New MAC, IP binding observed: 14:02:ec:3e:e1:78, 10.244.40.159 Apr 9 18:57:15 swoobat rackd[1304815]: Uninitialized: [info] ClusterClient connection established (HOST:IPv6Address(type='TCP', host='::ffff:192.168.33.23', port=34234, flowInfo=0, scopeID=0) PEER:IPv6Address(type='TCP', host='::ffff:192.168.33.22', port=5252, flowInfo=0, scopeID=0)) Apr 9 18:57:15 swoobat rackd[1304815]: Uninitialized: [info] ClusterClient connection established (HOST:IPv6Address(type='TCP', host='::ffff:192.168.33.23', port=34250, flowInfo=0, scopeID=0) PEER:IPv6Address(type='TCP', host='::ffff:192.168.33.22', port=5252, flowInfo=0, scopeID=0)) Apr 9 18:57:15 swoobat rackd[1304815]: provisioningserver.rpc.clusterservice: [info] Event-loop 'meinfoo:pid=2128395' authenticated. Apr 9 18:57:16 swoobat rackd[1304815]: provisioningserver.rpc.clusterservice: [info] Event-loop 'meinfoo:pid=2128395' authenticated. Apr 9 18:57:16 swoobat maas-log[1302692]: Apr 9 18:57:16 meinfoo maas.rpc.rackcontrollers: [info] Existing rack controller 'swoobat' running version 3.5.0~rc9-16269-g.8ccfdc1b0 has connected to region 'meinfoo'. Apr 9 18:57:16 swoobat rackd[1304815]: provisioningserver.rpc.clusterservice: [info] Rack controller '6m8qr6' registered (via meinfoo:pid=2128395) with MAAS version 3.5.0~rc9-16269-g.8ccfdc1b0. Apr 9 18:57:16 swoobat rackd[1304815]: provisioningserver.rpc.clusterservice: [info] Rack controller '6m8qr6' registered (via meinfoo:pid=2128395) with MAAS version 3.5.0~rc9-16269-g.8ccfdc1b0. Apr 9 18:57:17 swoobat regiond[1297844]: twisted.internet.protocol.Factory: [info] RegionServer connection established (HOST:IPv6Address(type='TCP', host='::ffff:10.245.222.223', port=5251, flowInfo=0, scopeID=0) PEER:IPv6Address(type='TCP', host='::ffff:10.245.222.182', port=34344, flowInfo=0, scopeID=0)) Apr 9 18:57:17 swoobat regiond[1297844]: twisted.internet.protocol.Factory: [info] RegionServer connection established (HOST:IPv6Address(type='TCP', host='::ffff:10.245.222.223', port=5251, flowInfo=0, scopeID=0) PEER:IPv6Address(type='TCP', host='::ffff:10.245.222.182', port=34354, flowInfo=0, scopeID=0)) Apr 9 18:57:17 swoobat regiond[1297844]: maasserver.rpc.regionservice: [info] Rack controller authenticated from '::ffff:10.245.222.182:34344'. Apr 9 18:57:17 swoobat regiond[1297844]: maasserver.rpc.regionservice: [info] Rack controller authenticated from '::ffff:10.245.222.182:34354'.
If the regiond was actually starting again there should be other log statements about twisted and other startup messages
Just checked in the logs, the region is not actually dead after the exception
Apr 9 18:56:51 swoobat regiond[1297846]: TypeError: sequence item 0: expected str instance, ConnectionLost found 2.0/machines/ HTTP/1.1 --> 500 INTERNAL_ SERVER_ ERROR (referrer: -; agent: Python- httplib2/ 0.20.2 (gzip)) rackcontrollers : [info] Existing rack controller 'swoobat' running version 3.5.0~rc9- 16269-g. 8ccfdc1b0 has connected to region 'meinfoo'. ss(type= 'TCP', host=': :ffff:192. 168.33. 23', port=34234, flowInfo=0, scopeID=0) PEER:IPv6Addres s(type= 'TCP', host=': :ffff:192. 168.33. 22', port=5252, flowInfo=0, scopeID=0)) ss(type= 'TCP', host=': :ffff:192. 168.33. 23', port=34250, flowInfo=0, scopeID=0) PEER:IPv6Addres s(type= 'TCP', host=': :ffff:192. 168.33. 22', port=5252, flowInfo=0, scopeID=0)) ver.rpc. clusterservice: [info] Event-loop 'meinfoo: pid=2128395' authenticated. ver.rpc. clusterservice: [info] Event-loop 'meinfoo: pid=2128395' authenticated. rackcontrollers : [info] Existing rack controller 'swoobat' running version 3.5.0~rc9- 16269-g. 8ccfdc1b0 has connected to region 'meinfoo'. ver.rpc. clusterservice: [info] Rack controller '6m8qr6' registered (via meinfoo: pid=2128395) with MAAS version 3.5.0~rc9- 16269-g. 8ccfdc1b0. ver.rpc. clusterservice: [info] Rack controller '6m8qr6' registered (via meinfoo: pid=2128395) with MAAS version 3.5.0~rc9- 16269-g. 8ccfdc1b0. internet. protocol. Factory: [info] RegionServer connection established (HOST:IPv6Addre ss(type= 'TCP', host=': :ffff:10. 245.222. 223', port=5251, flowInfo=0, scopeID=0) PEER:IPv6Addres s(type= 'TCP', host=': :ffff:10. 245.222. 182', port=34344, flowInfo=0, scopeID=0)) internet. protocol. Factory: [info] RegionServer connection established (HOST:IPv6Addre ss(type= 'TCP', host=': :ffff:10. 245.222. 223', port=5251, flowInfo=0, scopeID=0) PEER:IPv6Addres s(type= 'TCP', host=': :ffff:10. 245.222. 182', port=34354, flowInfo=0, scopeID=0)) rpc.regionservi ce: [info] Rack controller authenticated from '::ffff: 10.245. 222.182: 34344'. rpc.regionservi ce: [info] Rack controller authenticated from '::ffff: 10.245. 222.182: 34354'.
Apr 9 18:56:51 swoobat regiond[1297846]: regiond: [info] 127.0.0.1 POST /MAAS/api/
Apr 9 18:57:07 swoobat maas-log[1302692]: maas.interface: [info] eno1 (physical) on swoobat: New MAC, IP binding observed: 14:02:ec:3e:e1:78, 10.244.40.159
Apr 9 18:57:07 swoobat maas-log[1302692]: Apr 9 18:56:46 meinfoo maas.rpc.
Apr 9 18:57:07 swoobat maas-log[1302692]: Apr 9 18:57:07 meinfoo maas.interface: [info] eno1 (physical) on meinfoo: New MAC, IP binding observed: 14:02:ec:3e:e1:78, 10.244.40.159
Apr 9 18:57:07 swoobat maas-log[1302692]: Apr 9 18:57:07 leafeon maas.interface: [info] eno1 (physical) on leafeon: New MAC, IP binding observed: 14:02:ec:3e:e1:78, 10.244.40.159
Apr 9 18:57:15 swoobat rackd[1304815]: Uninitialized: [info] ClusterClient connection established (HOST:IPv6Addre
Apr 9 18:57:15 swoobat rackd[1304815]: Uninitialized: [info] ClusterClient connection established (HOST:IPv6Addre
Apr 9 18:57:15 swoobat rackd[1304815]: provisioningser
Apr 9 18:57:16 swoobat rackd[1304815]: provisioningser
Apr 9 18:57:16 swoobat maas-log[1302692]: Apr 9 18:57:16 meinfoo maas.rpc.
Apr 9 18:57:16 swoobat rackd[1304815]: provisioningser
Apr 9 18:57:16 swoobat rackd[1304815]: provisioningser
Apr 9 18:57:17 swoobat regiond[1297844]: twisted.
Apr 9 18:57:17 swoobat regiond[1297844]: twisted.
Apr 9 18:57:17 swoobat regiond[1297844]: maasserver.
Apr 9 18:57:17 swoobat regiond[1297844]: maasserver.
If the regiond was actually starting again there should be other log statements about twisted and other startup messages