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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