JDBC pooling Oracle driver Socket read timed out

Question

I run Java EE application on Glassfish server v3 together with Oracle 12 DB on the same machine under Windows Server 2012 64bit. I use latest ojdbc7 driver.
Connection pool config:
  <jdbc-connection-pool validation-table-name="DUAL" steady-pool-size="20" statement-cache-size="100" associate-with-thread="true" statement-timeout-in-seconds="30" idle-timeout-in-seconds="60" max-wait-time-in-millis="2000" validate-atmost-once-period-in-seconds="20" datasource-classname="oracle.jdbc.pool.OracleDataSource" pool-resize-quantity="5" max-pool-size="60" res-type="javax.sql.DataSource" name="dbPool" is-connection-validation-required="true">
  <property name="driverClass" value="oracle.jdbc.OracleDriver"></property>
  <property name="user" value="xxx"></property>
  <property name="url" value="jdbc:oracle:thin:@(DESCRIPTION=(ENABLE=BROKEN)(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST=127.0.0.1)(PORT=1521)))(CONNECT_DATA=(SERVICE_NAME=orcl)))"></property>
  <property name="password" value="xxx"></property>
  <property name="portNumber" value="1521"></property>
  <property name="databaseName" value="orcl"></property>
  <property name="serverName" value="127.0.0.1"></property>
  <property name="oracle.jdbc.ReadTimeout" value="300000"></property>
  <property name="oracle.net.CONNECT_TIMEOUT" value="10000"></property>
  </jdbc-connection-pool>
After 2 or 3 hours, when there is more than 1 user (3-5) using my application, it stops responding and I get this in glassfish logs
  javax.enterprise.resource.resourceadapter.com.sun.enterprise.resource.allocator|_ThreadID=152;_ThreadName=Thread-2;|RAR5038:Unexpected exception while creating resource for pool dbPool. Exception : javax.resource.spi.ResourceAllocationException: Connection could not be allocated because: IO Error: Socket read timed out
  Local Exception Stack:
  Exception [EclipseLink-4002] (Eclipse Persistence Services - 2.3.2.v20111125-r10461): org.eclipse.persistence.exceptions.DatabaseException
  Internal Exception: java.sql.SQLException: Error in allocating a connection. Cause: Connection could not be allocated because: IO Error: Socket read timed out
From the database side it looks like this
Fatal NI connect error 12560, connecting to:
  (LOCAL=NO)
  VERSION INFORMATION:
  TNS for 64-bit Windows: Version 12.1.0.1.0 - Production
  Oracle Bequeath NT Protocol Adapter for 64-bit Windows: Version 12.1.0.1.0 - Production
  Windows NT TCP/IP NT Protocol Adapter for 64-bit Windows: Version 12.1.0.1.0 - Production
  Time: 13-JUN-2014 03:14:49
  Tracing not turned on.
  Tns error struct:
  ns main err code: 12560
  TNS-12560: TNS:protocol adapter error
  ns secondary err code: 0
  nt main err code: 0
  nt secondary err code: 0
  nt OS err code: 0
  opiodr aborting process unknown ospid (3404) as a result of ORA-609
When I just reset db listener everything works ok for next 1-2 hours (depends on application load). So temporary solution is to run bat script from windows scheduler to reset the listener every 1h.
I tried everything I could find - applied these parameters:
  - Sqlnet.ora:
  SQLNET.INBOUND_CONNECT_TIMEOUT=180
  SQLNET.EXPIRE_TIME=5
  - Listener.ora:
  INBOUND_CONNECT_TIMEOUT_LISTENER_IPC=120
But still without success

Answer 1

Is the problem here just that you need a connection pool that closes idle connections?  Some pools will close idle connections after a time out period.  And the pool lets you set that time out period.  If the pool you are using doesn't provide that then use a different pool.