Polling to Database not working sometimes

Hi all,
I have created an ESB project. I am using polling operation to poll Oracle database table. I am using update field i.e. logical delete opeartion under polling.
I have deployed my process, its running perfectly fine. Polling is also happening.
But the problem is that polling is not consistent. With the same set of values, sometime polling takes place and some time nothing happens, means no update in the table & no instanses on ESB Console.
I have checked the log file too, but no such entry is there.
To overcome this problem, Whenever I restart my SOA server(10.1.3.3) everything works fine. But after few hours same thing happens.
Can anybody tell me, how to figure out what is happening.
Thanks,
Abhi...
Message was edited by:
Abhishek saurabh

Hi chintan,
I made this change in the logger configuration yesterday. Today morning when I logged into my ESB console and navigated to instance tab, I am not able to see any instance and I am getting this error:
An unhandled exception has been thrown in the ESB system. The exception reported is: "oracle.tip.esb.model.repository.exception.RepositoryException: Unable to get connection to Repository Ensure repository is accessible at oracle.tip.esb.model.repository.database.DatabaseRepository.getConnection(DatabaseRepository.java:1228) at oracle.tip.esb.model.repository.database.DatabaseRepository.getESBParameter(DatabaseRepository.java:1082) at ......<more..>
(Thread.java:595) Caused by: java.sql.SQLException: ORA-00257: archiver error. Connect internal only, until freed. at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:138) at
.....<more>
So I went to EM console, oc4j_soa->Administration tab->JDBC resorces->Connection pool->ESBpool(For ESB)->Test connection->Pressed Test button.
I am getting this error:
Unable to establish connection to "ESBPool". Error message: Exception occurred testing connection. Exception: java.sql.SQLException: ORA-00257: archiver error. Connect internal only, until freed
Any inputs on this...
Thanks,
Abhishek...

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