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Error : Connection pool abandoned

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

Check for the below in tomcat-resources.xml 

removeAbandoned="true"  -- was not required according to the documentatjion
removeAbandonedTimeout="30"
logAbandoned="true" -- should be fine if removeabandoned is true

The above should not be present in tomcat-resource.xml,  some customers prefer to have a timeout according to their configuration but Appian doesn't recommend it in the documentation.

## To void above error

remove the above lines from tomcat-resource.xml