JBoss に 'Destroying connection that is not valid, due to ..."java.sql.SQLException: pingDatabase failed status=XX"' というログが出力されました

Issue

JBoss から Oracle データベースに接続して利用しているのですが、server.log に以下のようなログが出力されました。以下の java.sql.SQLException: pingDatabase failed status=-1 以外にも、 java.sql.SQLException: pingDatabase failed status=-2 のようなメッセージが出力されることもあります。

WARN  [org.jboss.resource.adapter.jdbc.local.LocalManagedConnectionFactory] Destroying connection that is not valid, due to the following exception: oracle.jdbc.driver.T4CConnection@31625c24
java.sql.SQLException: pingDatabase failed status=-1
        at org.jboss.resource.adapter.jdbc.vendor.OracleValidConnectionChecker.isValidConnection(OracleValidConnectionChecker.java:74)
        at org.jboss.resource.adapter.jdbc.BaseWrapperManagedConnectionFactory.isValidConnection(BaseWrapperManagedConnectionFactory.java:560)
        at org.jboss.resource.adapter.jdbc.BaseWrapperManagedConnection.checkValid(BaseWrapperManagedConnection.java:364)
        at org.jboss.resource.adapter.jdbc.local.LocalManagedConnectionFactory.matchManagedConnections(LocalManagedConnectionFactory.java:402)
        at org.jboss.resource.connectionmanager.InternalManagedConnectionPool.getConnection(InternalManagedConnectionPool.java:225)
        at org.jboss.resource.connectionmanager.JBossManagedConnectionPool$BasePool.getConnection(JBossManagedConnectionPool.java:689)
        at org.jboss.resource.connectionmanager.BaseConnectionManager2.getManagedConnection(BaseConnectionManager2.java:404) 
        at org.jboss.resource.connectionmanager.TxConnectionManager.getManagedConnection(TxConnectionManager.java:424)
        at org.jboss.resource.connectionmanager.BaseConnectionManager2.allocateConnection(BaseConnectionManager2.java:496) 
        at org.jboss.resource.connectionmanager.BaseConnectionManager2$ConnectionManagerProxy.allocateConnection(BaseConnectionManager2.java:941)
        at org.jboss.resource.adapter.jdbc.WrapperDataSource.getConnection(WrapperDataSource.java:89)