https://community.appian.com/discussions/f/administration/11771/configuring-validations-data-source-files-in-jbossHi, We are migrating Appian from 7.6 to 17.2. We are using Jboss as the application server and database is SQL server. As per Jboss documentation its a good practice to have validation check in the data source file. Below is the snippet of the tagen-USTelligent Community 12https://community.appian.com/thread/52112?ContentTypeID=1Wed, 31 Jan 2018 10:05:21 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:493d8be9-2b16-45db-b952-9d2a37fa48ebnikitar442261Yes removing the tags solved the issue.<div style="clear:both;"></div>https://community.appian.com/thread/52004?ContentTypeID=1Thu, 25 Jan 2018 14:34:37 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:eb6dd2ac-25a1-4f1f-96e3-fa8ce459d08aJustin WattsAt first glance, that configuration looks fine.<br /> <br /> Have you confirmed that if your remove the validations tags that JBoss starts correctly? This error seems completely unrelated to the validation entries, and much more likely related to incorrectly setting up your security domain -<a href="https://docs.appian.com/suite/help/17.4/Configuring_Relational_Databases.html#configure-a-security-domain">docs.appian.com/.../Configuring_Relational_Databases.html</a><div style="clear:both;"></div>