When attempting to upgrade CABI JasperServer 6.3 to 7.1.1, it fails with a "Cannot connect to the database server" message:
CABI JasperServer 6.x
Red Hat Linux 7.x, 8.x
The Postgres processes were all running, however, found in the DB log (~/postgressql/logs/log.txt) the following errors repeated;
FATAL:the database system is shutting down
This means that the DB processes are in a hung state and not responding.
Stopped the JasperServer and then had to manually stop the Postgres DB using the 'fast' option:
cd <CABI_JASPER_INSTALL_DIR>/postgresql/bin
Then
su $POSTGRES_USER -c "./pg_ctl -D ../data -l ../logs/log.txt stop -m fast"
This immediately stops the Postgres DB processes by cutting any hung client connections.
Then restart the Postgres DB:
su $POSTGRES_USER -c "./pg_ctl -D ../data -l ../logs/log.txt start"
After this, the GUI install proceeds as normal: