Web service not available after updating to v2.4.6

cryosparcm thinks it started okay, and the process is in fact running … but nothing is listening on port 39000:

[cryosparc@norfolk ~]$ cryosparcm start
Starting cryoSPARC System master process..
CryoSPARC is not already running.
database: started
command_core: started
  cryosparc command core startup complete.
command_vis: started
command_proxy: started
webapp: started
-----------------------------------------------------

CryoSPARC master started. 
 From this machine, access the webapp at
    http://localhost:39000
 From other machines on the network, access at
    http://norfolk.maas:39000

Startup can take several minutes. Point your browser to the address
and refresh until you see the cryoSPARC web interface.
[cryosparc@norfolk ~]$ ss -tln
State       Recv-Q Send-Q                                 Local Address:Port                                                Peer Address:Port              
LISTEN      0      128                                                *:39003                                                          *:*                  
LISTEN      0      50                                                 *:39004                                                          *:*                  
LISTEN      0      64                                                 *:33440                                                          *:*                  
LISTEN      0      128                                                *:6818                                                           *:*                  
LISTEN      0      5                                                  *:8649                                                           *:*                  
LISTEN      0      64                                                 *:37870                                                          *:*                  
LISTEN      0      128                                                *:111                                                            *:*                  
LISTEN      0      128                                                *:50641                                                          *:*                  
LISTEN      0      128                                                *:22                                                             *:*                  
LISTEN      0      128                                        127.0.0.1:631                                                            *:*                  
LISTEN      0      128                                                *:39001                                                          *:*                  
LISTEN      0      128                                                *:39002                                                          *:*                  
LISTEN      0      128                                        127.0.0.1:6010                                                           *:*                  
LISTEN      0      64                                                :::6556                                                          :::*                  
LISTEN      0      64                                                :::38595                                                         :::*                  
LISTEN      0      128                                               :::58187                                                         :::*                  
LISTEN      0      128                                               :::111                                                           :::*                  
LISTEN      0      128                                               :::22                                                            :::*                  
LISTEN      0      128                                              ::1:631                                                           :::*                  
LISTEN      0      64                                                :::46841                                                         :::*                  
LISTEN      0      128                                              ::1:6010                                                          :::*                  
[cryosparc@norfolk ~]$

Hi @ScarabMonkey,

Thanks for posting. Can you post the logs of cryosparcm log webapp?

It reports absolutely nothing - even after a crysparcm restart:

[cryosparc@norfolk ~]$ cryosparcm restart
CryoSPARC is running.
Stopping cryosparc.
command_proxy: stopped
command_vis: stopped
webapp: stopped
command_core: stopped
database: stopped
Shut down
Starting cryoSPARC System master process..
CryoSPARC is not already running.
database: started
command_core: started
  cryosparc command core startup complete.
command_vis: started
command_proxy: started
webapp: started
-----------------------------------------------------

CryoSPARC master started. 
 From this machine, access the webapp at
    http://localhost:39000
 From other machines on the network, access at
    http://norfolk.maas:39000

Startup can take several minutes. Point your browser to the address
and refresh until you see the cryoSPARC web interface.
[cryosparc@norfolk ~]$ cryosparcm log webapp
^C
[cryosparc@norfolk ~]$ curl http://localhost:39000
curl: (7) Failed connect to localhost:39000; Connection refused
[cryosparc@norfolk ~]$

I have just tried a fresh install on the same machine with a new database directory and get exactly the same issue.

Hey @ScarabMonkey,

When you did a fresh install, did you use a different port?

I hadn’t tried a different port, but now I did and get exactly the same.

Now I’ve tried a fresh install of v2.4.6 with a clean directory and database, running on a different port on CentOS 7.5.1804
At least the service now starts and appears to be listening on the new port and indeed the webpage tries to load, but I just get a blank grey page after seeing the login box appear and disappear for a split second.
I note that the url gets redirected to “[hostname]/login?redirect=%2F”

EDIT: this re-install is now working - but it means we have lost all previous records