Warn message "Destroying connection that could not be successfully matched" from DB2 JDBC datasource in JBoss EAP

Issue

It seems our production application is losing it's DB connection to DB2.  The connection will only come back after we restart JBoss. We are using this datasource:

<?xml version="1.0" encoding="UTF-8" standalone="yes"?><datasources>
    <local-tx-datasource>
        <jndi-name>testDB</jndi-name>
        <rar-name>jboss-local-jdbc.rar</rar-name>
        <use-java-context>true</use-java-context>
        <connection-definition>javax.sql.DataSource</connection-definition>
        <jmx-invoker-name>jboss:service=invoker,type=jrmp</jmx-invoker-name>
        <min-pool-size>1</min-pool-size>
        <max-pool-size>100</max-pool-size>
        <transaction-isolation>TRANSACTION_READ_COMMITTED</transaction-isolation>
        <blocking-timeout-millis>30000</blocking-timeout-millis>
        <idle-timeout-minutes>30</idle-timeout-minutes>
        <prefill>false</prefill>
        <background-validation>false</background-validation>
        <background-validation-millis>0</background-validation-millis>
        <validate-on-match>true</validate-on-match>
        <statistics-formatter>org.jboss.resource.statistic.pool.JBossDefaultSubPoolStatisticFormatter</statistics-formatter>
        <isSameRM-override-value>false</isSameRM-override-value>
        <allocation-retry>0</allocation-retry>
        <allocation-retry-wait-millis>5000</allocation-retry-wait-millis>
        <application-managed-security xsi:type="securityMetaData" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"/>
        <metadata/>
        <type-mapping>DB2</type-mapping>
        <local-transaction/>
        <user-name>***********</user-name>
        <password>***********</password>
        <check-valid-connection-sql>SELECT COUNT(TYPESCHEMA) FROM SYSCAT.DATATYPES</check-valid-connection-sql>
        <prepared-statement-cache-size>100</prepared-statement-cache-size>
        <share-prepared-statements>false</share-prepared-statements>
        <set-tx-query-timeout>false</set-tx-query-timeout>
        <query-timeout>0</query-timeout>
        <url-delimiter>|</url-delimiter>
        <driver-class>com.ibm.db2.jcc.DB2Driver</driver-class>
        <connection-url>jdbc:db2://10.20.30.40:50014/testDB</connection-url>
    </local-tx-datasource>
</datasources>