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Problem

When trying to login, application displays the following error: "Exception caught: 500 The call failed on the server".

This can happen:

  1. if the browser window with the application stayed open during update
  2. if the browser session has expired or
  3. if database is not running.



Solution

Refresh browser (Ctrl+F5) and then log in again OR log out and log in manually. If this doesn't help, clear your browsing data and log in again.



If this method doesn't work, access the server via ssh and apply the following steps:

Linux

  1. Check the status of database 
  2. Start the postgresql service
  3. Stop tomcat6 service
  4. Start tomcat6 service (to register the application on the database)

Debian 7 / Ubuntu 14 / Centos 6

  1. service postgresql-9.5 status
  2. service postgresql-9.5 start
  3. service tomcat6 stop
  4. service tomcat6 start

Centos 7

  1. systemctl status postgresql-9.5
  2. systemctl start postgresql-9.5
  3. systemctl stop tomcat
  4. systemctl start tomcat

Debian 8 / Ubuntu 16

  1. systemctl status postgresql
  2. systemctl start postgresql
  3. systemctl stop tomcat7
  4. systemctl start tomcat7


Info

Names of Tomcat and PostgreSQL services in these article are an example. Check which version of these services are installed on your server and use those names in the commands listed above.

Windows

  1. Refresh browser (Ctrl+F5) and then log in again OR log out and log in manually.

If this doesn't work, do next:

  1. Start the postgresql service 
    In Windows Command Prompt or PowerShell execute the following command: net start postgresql-x64-9.5
  2. Restart tomcat service (to register the application on the database)
    1. Double click on Apache Tomcat Properties in system tray. In General tab, click Stop to stop tomcat service.
    2. Click Start to start tomcat service.








Info

Version 9.5 of PostgreSQL service in these article is an example. Check which version of this service is installed on your server and use this name in the commands listed above. For example, if you have installed Postgresql 9.4 the command 2b will be net stop postgresql-x64-9.4