Database connection getting reset after application server is idle

Hi,
I have a centralized database with 7 to 8 tablespaces for different applications, for one of the linux based application i am having the captioned issue. The system works fine but whenever its left idle for more than 45 minutes the following scenario occurs.
1.     04 Transactions performed all the transactions are parked in the queue of process1.
2.     Process 1 reads the first transaction and in order to pass it to the next process queue (process2) refers to the database table to check that the process is registered and running and gets its process id to pass the message to its queue. At this level while trying to get the next process details the database call takes somewhere around 15 minutes and return the below error.
DBError::dumpError error code: [3135], error Msg: [ORA-03135: connection lost contact
]11/04/24 12:55:45:352 |INFO| DBCommand::ExecuteSP--DR SP [PKGCONFIGURATION.spIsModuleRegistered] Exception [3135] ORA-03135: connection lost contact
11/04/24 12:55:45:405 |ERR | Registrar::isRegistered mod id [21987475]: registration check failed
the above scenario occurs first time when every process receives any message from other and tries to fetch any details from the database. Once all the process have got these errors and are through with the database the next messages gets entertained in a proper manner.
Can anybody help in this regard. Secondly i do have the trace level logs if needed can be shared for reference and below is the error i get in SQLNET.ORA
Fatal NI connect error 12170.
VERSION INFORMATION:
     TNS for Linux: Version 10.2.0.1.0 - Production
     TCP/IP NT Protocol Adapter for Linux: Version 10.2.0.1.0 - Production
Time: 27-APR-2011 16:07:52
Tracing not turned on.
Tns error struct:
ns main err code: 12535
TNS-12535: TNS:operation timed out
ns secondary err code: 12560
nt main err code: 505
TNS-00505: Operation timed out
nt secondary err code: 110
nt OS err code: 0
Thanks in anticipation.
Regards
Hassan

Not an Oracle issue. Network. Your network connection has been configured to time out after 45 minutes and for a reason.
Do either one of the following things, in order of preference
1 Take the 'application', find a garbage bin, and put it in the garbage bin, where it belongs.
Oracle has Streams available for Queuing applications, and this heavily sounds like a hobby implementation of Streams.
2 Have your network administratror up the timeout to indefinite.
You may want to implement 2) before you implement 1)
Sybrand Bakker
Senior Oracle DBA

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Database connection getting reset after application server is idle

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