[DRAFT] KB-XXXX Tomcat Connection pool abandoned

Symptoms

Tomcat is not able to start after a fresh install. The following error can be seen in the application server log:

WARNING [Tomcat JDBC Pool Cleaner[2074407503:1572289078027]] org.apache.tomcat.jdbc.pool.ConnectionPool.abandon Connection has been abandoned PooledConnection[com.ibm.db2.jcc.t4.b@2a7968cc]:java.lang.Exception

Cause

This issue occurs when <APPIAN_HOME>/conf/tomcat-resources.xml has the below property set

removeAbandoned="true"
removeAbandonedTimeout="30"
logAbandoned="true"

Action

Remove the above lines from cause from the file <APPIAN_HOME>/conf/tomcat-resources.xml

The documentation for Configuring Relational Databases can be found .

Affected Versions

This article applies to Appian 18.3 and later.