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Verifying An Upgrade

Once an upgrade is completed, you'll want to verify that the application server is actually in a healthy, functional state.

Ensuring the Application Can Start

The first thing to verify when performing an upgrade is whether the app can even start up correctly.

To verify that the application can start up correctly, the first thing to do (aside from visiting the site url to see if it loads) is to check the logs for startup errors.

sudo tail -f /opt/tomcat/logs/catalina.out

While there, you can also verify that any new database migrations are being applied correctly.