Im using postgres as DB and my datasource configuration is as follows:

<datasources>

<datasource enabled="true" jndi-name="java:/DefaultDS" jta="true" pool-name="PostgresSqlDS" use-ccm="true" use-java-context="true">

    <connection-url>jdbc:postgresql://localhost:55432/TEST_DB</connection-url>

    <driver>postgresql</driver>

    <driver-class>org.postgresql.Driver</driver-class>

    <pool>

         <min-pool-size>10</min-pool-size>

         <max-pool-size>100</max-pool-size>

         <prefill>true</prefill>

    </pool>

    <security>

        <security-domain>

          DefaultDSSecurityPolicy

         </security-domain>

    </security>

    <validation>

     <valid-connection-checker class-name="com.test.server.genlib.database.dberror.TestPostgreSQLValidConnectionChecker"/>

      <exception-sorter class-name="com.test.server.genlib.database.dberror.TestDataBaseErrorChecker"/>

      <validate-on-match>false</validate-on-match>

      <background-validation>true</background-validation>

      <background-validation-millis>20000</background-validation-millis>

    </validation>

    <timeout>

      <blocking-timeout-millis>30000</blocking-timeout-millis>

      <xa-resource-timeout>0</xa-resource-timeout>

    </timeout>

    <statement>

      <track-statements>true</track-statements>

    </statement>

  </datasource>

</datasources>

We are using custom classes for both error checker and Valid connection checker.

TestDataBaseErrorChecker implements TestDataBaseErrorChecker and

TestPostgreSQLValidConnectionChecker implements org.jboss.jca.adapters.jdbc.spi.ValidConnectionChecker.

We are using jboss 7.2.0 and ironjcaamar1.0.17-final.

Using this configuration.during server startup it shows a warning that "TestPostgreSQLValidConnectionChecker" cannot be loaded.

The log trace is:

2014-09-08 14:22:39,064 WARN  [org.jboss.jca.adapters.jdbc.local.LocalManagedConnectionFactory] Exception trying to create valid connection checker (disabling):: java.lang.Exception: Unable to load: com.test.server.genlib.database.dberror.TestPostgreSQLValidConnectionChecker

  at org.jboss.jca.adapters.jdbc.BaseWrapperManagedConnectionFactory.loadPlugin(BaseWrapperManagedConnectionFactory.java:1027)

  at org.jboss.jca.adapters.jdbc.BaseWrapperManagedConnectionFactory.isValidConnection(BaseWrapperManagedConnectionFactory.java:1104)

  at org.jboss.jca.adapters.jdbc.BaseWrapperManagedConnection.checkValid(BaseWrapperManagedConnection.java:512)

  at org.jboss.jca.adapters.jdbc.BaseWrapperManagedConnectionFactory.getInvalidConnections(BaseWrapperManagedConnectionFactory.java:923)

  at org.jboss.jca.core.connectionmanager.pool.mcp.SemaphoreArrayListManagedConnectionPool.validateConnections(SemaphoreArrayListManagedConnectionPool.java:890)

  at org.jboss.jca.core.connectionmanager.pool.validator.ConnectionValidator$ConnectionValidatorRunner.run(ConnectionValidator.java:277)

  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)

  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)

  at java.lang.Thread.run(Thread.java:722)

But when I set "validate-on-match" as true, it works fine and the connections are checked every 20 seconds and also connections are checked when fetched from connection pool.

Here I dont want connections to be validated when it is fetched from connection pool, because background validation is already enabled, so validate-on-match will be redundant.

What am I missing here? Where "validate-on-match" should enabled always?