Tomcat uses its context.xml file to create database connection pools and to find the database. Remove the "jdbc/problemDB" resource from context.xml. Shrine-setup.zip contains a sample context.xml file. 

Here's an example of an existing context.xml file for a local mariaDB:

/opt/shrine/tomcat/conf
<?xml version='1.0' encoding='utf-8'?>
<!-- The contents of this file will be loaded for each web application -->

<Context>
    <WatchedResource>WEB-INF/web.xml</WatchedResource>
    <Resource name="jdbc/shrineDB" auth="Container" type="javax.sql.DataSource"
              maxTotal="128" maxIdle="32" maxWaitMillis="10000"
              username="shrine" password="demouser" driverClassName="com.mysql.jdbc.Driver"
              url="jdbc:mysql://localhost:3306/shrine_query_history?serverTimezone=UTC"
              testOnBorrow="true" validationQuery="SELECT 1" />

    <Resource name="jdbc/adapterAuditDB" auth="Container" type="javax.sql.DataSource"
              maxTotal="128" maxIdle="32" maxWaitMillis="10000"
              username="shrine" password="demouser" driverClassName="com.mysql.jdbc.Driver"
              url="jdbc:mysql://localhost:3306/adapterAuditDB?serverTimezone=UTC"
              testOnBorrow="true" validationQuery="SELECT 1" />

    <Resource name="jdbc/qepAuditDB" auth="Container" type="javax.sql.DataSource"
              maxTotal="512" maxIdle="32" maxWaitMillis="10000"
              username="shrine" password="demouser" driverClassName="com.mysql.jdbc.Driver"
              url="jdbc:mysql://localhost:3306/qepAuditDB?serverTimezone=UTC"
              testOnBorrow="true" validationQuery="SELECT 1" />

    <Resource name="jdbc/stewardDB" auth="Container" type="javax.sql.DataSource"
              maxTotal="128" maxIdle="32" maxWaitMillis="10000"
              username="shrine" password="demouser" driverClassName="com.mysql.jdbc.Driver"
              url="jdbc:mysql://localhost:3306/stewardDB?serverTimezone=UTC"
              testOnBorrow="true" validationQuery="SELECT 1" />
</Context>
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