Hi,
MySQL will timeout the connections that are idle for 8 hours. You can
change your server settings according to your requirements.
You can enable "table based connection-validation" for GlassFish
Connection Pools. This will help to remove the timed-out/invalid
connections from the pool
http://docs.sun.com/app/docs/doc/819-3662/6n5s9hmts?a=view
Thanks,
-Jagadish
On Mon, 2007-02-12 at 14:00 -0600, Jon Miller wrote:
> Hi all,
>
> I'm just beginning to start using Glassfish Persistence (V2 B33) with MySQL
> 5.0. I've noticed the following exception a few times now and my best guess
> at this point as to what it is is that MySQL is timing the connections out.
> I'm wondering if GP removes broken connections from the connection pool?
> MySQL has a "autoReconnectForPools" property that I've used in the past,
> but, I noticed in the documentation that it looks like it may be deprecated
> and removed.
>
> Jon
>
>
> Last packet sent to the server was 5 ms ago.Error Code: 0
> Call:SELECT Id, Name, CreationUserName, Description, LastWriteUserName,
> LastWriteTime, CreationTime FROM Item ORDER BY Name ASC
> Query:ReadAllQuery(edu.uchicago.at.reservations.persistence.entity.Item)
> at
> oracle.toplink.essentials.exceptions.DatabaseException.sqlException(DatabaseException.java:303)
> at
> oracle.toplink.essentials.internal.databaseaccess.DatabaseAccessor.basicExecuteCall(DatabaseAccessor.java:551)
> at
> oracle.toplink.essentials.internal.databaseaccess.DatabaseAccessor.executeCall(DatabaseAccessor.java:437)
> at
> oracle.toplink.essentials.threetier.ServerSession.executeCall(ServerSession.java:465)
> at
> oracle.toplink.essentials.internal.queryframework.DatasourceCallQueryMechanism.executeCall(DatasourceCallQueryMechanism.java:213)
> at
> oracle.toplink.essentials.internal.queryframework.DatasourceCallQueryMechanism.executeCall(DatasourceCallQueryMechanism.java:199)
> at
> oracle.toplink.essentials.internal.queryframework.DatasourceCallQueryMechanism.executeSelectCall(DatasourceCallQueryMechanism.java:270)
> at
> oracle.toplink.essentials.internal.queryframework.DatasourceCallQueryMechanism.selectAllRows(DatasourceCallQueryMechanism.java:600)
> at
> oracle.toplink.essentials.internal.queryframework.ExpressionQueryMechanism.selectAllRowsFromTable(ExpressionQueryMechanism.java:2207)
> at
> oracle.toplink.essentials.internal.queryframework.ExpressionQueryMechanism.selectAllRows(ExpressionQueryMechanism.java:2185)
> at
> oracle.toplink.essentials.queryframework.ReadAllQuery.executeObjectLevelReadQuery(ReadAllQuery.java:302)
> at
> oracle.toplink.essentials.queryframework.ObjectLevelReadQuery.executeDatabaseQuery(ObjectLevelReadQuery.java:709)
> at
> oracle.toplink.essentials.queryframework.DatabaseQuery.execute(DatabaseQuery.java:609)
> at
> oracle.toplink.essentials.queryframework.ObjectLevelReadQuery.execute(ObjectLevelReadQuery.java:677)
> at
> oracle.toplink.essentials.queryframework.ObjectLevelReadQuery.executeInUnitOfWork(ObjectLevelReadQuery.java:731)
> at
> oracle.toplink.essentials.internal.sessions.UnitOfWorkImpl.internalExecuteQuery(UnitOfWorkImpl.java:2219)
> at
> oracle.toplink.essentials.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:937)
> at
> oracle.toplink.essentials.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:909)
> at
> oracle.toplink.essentials.internal.ejb.cmp3.base.EJBQueryImpl.executeReadQuery(EJBQueryImpl.java:335)
> at
> oracle.toplink.essentials.internal.ejb.cmp3.base.EJBQueryImpl.getResultList(EJBQueryImpl.java:442)
> at
> edu.uchicago.at.reservations.ReservationsService.findItems(ReservationsService.java:48)
> at
> edu.uchicago.at.reservations.ReservationsWebService.findItems(ReservationsWebService.java:37)
> ... 35 more
> Caused by: com.mysql.jdbc.CommunicationsException: Communications link
> failure due to underlying exception:
>
> ** BEGIN NESTED EXCEPTION **
>
> java.net.SocketException
> MESSAGE: Broken pipe
>
> STACKTRACE:
>
> java.net.SocketException: Broken pipe
> at java.net.SocketOutputStream.socketWrite0(Native Method)
> at java.net.SocketOutputStream.socketWrite(Unknown Source)
> at java.net.SocketOutputStream.write(Unknown Source)
> at java.io.BufferedOutputStream.flushBuffer(Unknown Source)
> at java.io.BufferedOutputStream.flush(Unknown Source)
> at com.mysql.jdbc.MysqlIO.send(MysqlIO.java:2637)
> at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1554)
> at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1665)
> at com.mysql.jdbc.Connection.execSQL(Connection.java:3124)
> at
> com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1149)
> at
> com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:1262)
> at
> oracle.toplink.essentials.internal.databaseaccess.DatabaseAccessor.executeSelect(DatabaseAccessor.java:711)
> at
> oracle.toplink.essentials.internal.databaseaccess.DatabaseAccessor.basicExecuteCall(DatabaseAccessor.java:486)
> at
> oracle.toplink.essentials.internal.databaseaccess.DatabaseAccessor.executeCall(DatabaseAccessor.java:437)
> at
> oracle.toplink.essentials.threetier.ServerSession.executeCall(ServerSession.java:465)
> at
> oracle.toplink.essentials.internal.queryframework.DatasourceCallQueryMechanism.executeCall(DatasourceCallQueryMechanism.java:213)
> at
> oracle.toplink.essentials.internal.queryframework.DatasourceCallQueryMechanism.executeCall(DatasourceCallQueryMechanism.java:199)
> at
> oracle.toplink.essentials.internal.queryframework.DatasourceCallQueryMechanism.executeSelectCall(DatasourceCallQueryMechanism.java:270)
> at
> oracle.toplink.essentials.internal.queryframework.DatasourceCallQueryMechanism.selectAllRows(DatasourceCallQueryMechanism.java:600)
> at
> oracle.toplink.essentials.internal.queryframework.ExpressionQueryMechanism.selectAllRowsFromTable(ExpressionQueryMechanism.java:2207)
> ...