ambari 2.7.1 to 2.7.3 upgrade failed

[#1]

When upgrading Ambari from 2.7.1 to 2.7.3, I get these messages with no mention of failure or success:

Preparing to unpack .../ambari-server_2.7.3.0-139_amd64.deb ...
Backing up Ambari properties: /etc/ambari-server/conf/ambari.properties -> /etc/ambari-server/conf/ambari.properties.rpmsave
Backing up Ambari properties: /var/lib/ambari-server/ambari-env.sh -> /var/lib/ambari-server/ambari-env.sh.rpmsave
Backing up JAAS login file: /etc/ambari-server/conf/krb5JAASLogin.conf -> /etc/ambari-server/conf/krb5JAASLogin.conf.rpmsave
Backing up stacks directory: /var/lib/ambari-server/resources/stacks -> /var/lib/ambari-server/resources/stacks_25_01_19_17_08.old
Backing up common-services directory: /var/lib/ambari-server/resources/common-services -> /var/lib/ambari-server/resources/common-services_25_01_19_17_08.old
Backing up mpacks directory: /var/lib/ambari-server/resources/mpacks -> /var/lib/ambari-server/resources/mpacks_25_01_19_17_08.old
Backing up Ambari view jars: /var/lib/ambari-server/resources/views/*.jar -> /var/lib/ambari-server/resources/views/backups/
Backing up Ambari server jar: /usr/lib/ambari-server/ambari-server-2.7.1.0.169.jar -> /usr/lib/ambari-server-backups/
Unpacking ambari-server (2.7.3.0-139) over (2.7.1.0-169) ...
insserv: warning: script 'K01hst' missing LSB tags and overrides
insserv: warning: script 'hst' missing LSB tags and overrides
grep: Invalid content of \{\}
Processing triggers for ureadahead (0.100.0-19) ...
Processing triggers for systemd (229-4ubuntu21.15) ...
Setting up ambari-server (2.7.3.0-139) ...
insserv: warning: script 'K01hst' missing LSB tags and overrides
insserv: warning: script 'hst' missing LSB tags and overrides
grep: Invalid content of \{\}

and the subsequent "ambari-server upgrade" fails with this error:

Using python  /usr/bin/python
Upgrading ambari-server
INFO: Upgrade Ambari Server
INFO: Updating Ambari Server properties in ambari.properties ...
INFO: Updating Ambari Server properties in ambari-env.sh ...
INFO: Original file ambari-env.sh kept
WARNING: server.jdbc.database_name property isn't set in ambari.properties . Setting it to default value - ambari
INFO: Fixing database objects owner
ERROR: Unexpected AttributeError: 'NoneType' object has no attribute 'title'
For more info run ambari-server with -v or --verbose option

Any pointers/guidance to fix this is appreciated.

[#2 · Accepted solution]

@Massoud Mazar

There is a problem with your ambari.properties server.jdbc.database_name entry see attached.

[#3]

Thanks Geoffrey. I copied the backup of the ambari.properties to expected location and ran the upgrade command again and it worked this time.