It seems that permission has been changed, in 16.04 localhost privileges are drwxrwxr-x 2 root tomcat8 4096 Dec 22 10:22 localhost
In 18.04 drwxr-xr-x 2 root tomcat8 4096 Sep 9 19:47 localhost
so write privilege has been removed for tomcat8 group in 18.04. Has manager comes with tomcat8 it does not have permission to deploy application.
More generally I think my bug concern the whole tomcat8-admin package (where manager belongs to) which is not working.
It seems that permission has been changed, in 16.04 localhost privileges are
drwxrwxr-x 2 root tomcat8 4096 Dec 22 10:22 localhost
In 18.04
drwxr-xr-x 2 root tomcat8 4096 Sep 9 19:47 localhost
so write privilege has been removed for tomcat8 group in 18.04. Has manager comes with tomcat8 it does not have permission to deploy application.
More generally I think my bug concern the whole tomcat8-admin package (where manager belongs to) which is not working.