Issue

• Encountering IJ000453 and IJ000655 errors

... javax.resource.ResourceException: IJ000453: Unable to get managed connection for java:jboss/datasources/oracleOne
        at org.jboss.jca.core.connectionmanager.AbstractConnectionManager.getManagedConnection(AbstractConnectionManager.java:390)
        at org.jboss.jca.core.connectionmanager.tx.TxConnectionManagerImpl.getManagedConnection(TxConnectionManagerImpl.java:368)
        at org.jboss.jca.core.connectionmanager.AbstractConnectionManager.allocateConnection(AbstractConnectionManager.java:464)
        at org.jboss.jca.adapters.jdbc.WrapperDataSource.getConnection(WrapperDataSource.java:139)
        ....
Caused by: javax.resource.ResourceException: IJ000655: No managed connections available within configured blocking timeout (30000 [ms])
        at org.jboss.jca.core.connectionmanager.pool.mcp.SemaphoreArrayListManagedConnectionPool.getConnection(SemaphoreArrayListManagedConnectionPool.java:384)
        at org.jboss.jca.core.connectionmanager.pool.AbstractPool.getSimpleConnection(AbstractPool.java:397)
        at org.jboss.jca.core.connectionmanager.pool.AbstractPool.getConnection(AbstractPool.java:365)
        at org.jboss.jca.core.connectionmanager.AbstractConnectionManager.getManagedConnection(AbstractConnectionManager.java:329)
        at org.jboss.jca.core.connectionmanager.tx.TxConnectionManagerImpl.getManagedConnection(TxConnectionManagerImpl.java:368)
        at org.jboss.jca.core.connectionmanager.AbstractConnectionManager.allocateConnection(AbstractConnectionManager.java:464)
        at org.jboss.jca.adapters.jdbc.WrapperDataSource.getConnection(WrapperDataSource.java:139)
        ...

• Multiple thread dumps (over a long period) show that a single thread executing oracle.jdbc.driver.OracleDriver.connect() does not return

"ajp-/0.0.0.0:8809-1" daemon prio=10 tid=0x00002b3c84001000 nid=0x7a00 runnable [0x00002b3b640fb000]
   java.lang.Thread.State: RUNNABLE
        at java.net.SocketInputStream.socketRead0(Native Method)
        at java.net.SocketInputStream.read(SocketInputStream.java:152)
        at java.net.SocketInputStream.read(SocketInputStream.java:122)
        at oracle.net.ns.Packet.receive(Packet.java:300)
        at oracle.net.ns.DataPacket.receive(DataPacket.java:106)
        at oracle.net.ns.NetInputStream.getNextPacket(NetInputStream.java:315)
        at oracle.net.ns.NetInputStream.read(NetInputStream.java:260)
        at oracle.net.ns.NetInputStream.read(NetInputStream.java:185)
        at oracle.net.ns.NetInputStream.read(NetInputStream.java:102)
        at oracle.jdbc.driver.T4CSocketInputStreamWrapper.readNextPacket(T4CSocketInputStreamWrapper.java:124)
        at oracle.jdbc.driver.T4CSocketInputStreamWrapper.read(T4CSocketInputStreamWrapper.java:80)
        at oracle.jdbc.driver.T4CMAREngine.unmarshalUB1(T4CMAREngine.java:1137)
        at oracle.jdbc.driver.T4C8TTIdty.receive(T4C8TTIdty.java:669)
        at oracle.jdbc.driver.T4C8TTIdty.doRPC(T4C8TTIdty.java:576)
        at oracle.jdbc.driver.T4CConnection.connect(T4CConnection.java:1166)
        at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:320)
        at oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:546)
        at oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:236)
        at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:32)
        at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:521)
        ...
        - locked <0x0000000448274d10> (a org.jboss.jca.adapters.jdbc.local.LocalManagedConnectionFactory)
        ...
        at org.jboss.jca.adapters.jdbc.WrapperDataSource.getConnection(WrapperDataSource.java:139)
        ...

• A number of threads (approximately the same number as the max-pool-size for the datasource) are waiting for monitor entry

"ajp-/0.0.0.0:8809-2" daemon prio=10 tid=0x00002b3c84002000 nid=0x7a08 waiting for monitor entry [0x00002b3b9880a000]
   java.lang.Thread.State: BLOCKED (on object monitor)
        at org.jboss.jca.adapters.jdbc.BaseWrapperManagedConnectionFactory.getConnectionProperties(BaseWrapperManagedConnectionFactory.java:951)
        - waiting to lock <0x0000000448274d10> (a org.jboss.jca.adapters.jdbc.local.LocalManagedConnectionFactory)
        at org.jboss.jca.adapters.jdbc.local.LocalManagedConnectionFactory.matchManagedConnections(LocalManagedConnectionFactory.java:447)
        at org.jboss.jca.core.connectionmanager.pool.mcp.SemaphoreArrayListManagedConnectionPool.getConnection(SemaphoreArrayListManagedConnectionPool.java:284)
        at org.jboss.jca.core.connectionmanager.pool.AbstractPool.getSimpleConnection(AbstractPool.java:397)
        at org.jboss.jca.core.connectionmanager.pool.AbstractPool.getConnection(AbstractPool.java:365)
        at org.jboss.jca.core.connectionmanager.AbstractConnectionManager.getManagedConnection(AbstractConnectionManager.java:329)
        at org.jboss.jca.core.connectionmanager.tx.TxConnectionManagerImpl.getManagedConnection(TxConnectionManagerImpl.java:368)
        at org.jboss.jca.core.connectionmanager.AbstractConnectionManager.allocateConnection(AbstractConnectionManager.java:464)
        at org.jboss.jca.adapters.jdbc.WrapperDataSource.getConnection(WrapperDataSource.java:139)
        ...

"ajp-/0.0.0.0:8809-4" daemon prio=10 tid=0x00002b3c84004000 nid=0x7a1e waiting for monitor entry [0x00002b3b6c0fc000]
   java.lang.Thread.State: BLOCKED (on object monitor)
        at org.jboss.jca.adapters.jdbc.local.LocalManagedConnectionFactory.createManagedConnection(LocalManagedConnectionFactory.java:213)
        - waiting to lock <0x0000000448274d10> (a org.jboss.jca.adapters.jdbc.local.LocalManagedConnectionFactory)
        at org.jboss.jca.core.connectionmanager.pool.mcp.SemaphoreArrayListManagedConnectionPool.createConnectionEventListener(SemaphoreArrayListManagedConnectionPool.java:775)
        at org.jboss.jca.core.connectionmanager.pool.mcp.SemaphoreArrayListManagedConnectionPool.getConnection(SemaphoreArrayListManagedConnectionPool.java:345)
        at org.jboss.jca.core.connectionmanager.pool.AbstractPool.getSimpleConnection(AbstractPool.java:397)
        at org.jboss.jca.core.connectionmanager.pool.AbstractPool.getConnection(AbstractPool.java:365)
        at org.jboss.jca.core.connectionmanager.AbstractConnectionManager.getManagedConnection(AbstractConnectionManager.java:329)
        at org.jboss.jca.core.connectionmanager.tx.TxConnectionManagerImpl.getManagedConnection(TxConnectionManagerImpl.java:368)
        at org.jboss.jca.core.connectionmanager.AbstractConnectionManager.allocateConnection(AbstractConnectionManager.java:464)
        at org.jboss.jca.adapters.jdbc.WrapperDataSource.getConnection(WrapperDataSource.java:139)
        ...