Intermittence for execute Polling with DataBase Adapter in OSB11g

Hello Guys,
I'm having a problem running the polling DataBase Adapter OSB11g. The creation of the adapter was made in Jdeveloper 11.
The problem is:
Intermittence to run the polling DataBase. Sometimes it works, other time it does not work.
Displays the following exception:
*<Info> <JCA_FRAMEWORK_AND_ADAPTER> <BEA-000000> <<oracle.tip.adapter.db.InboundWork handleException> BINDING.JCA-11624*
DBActivationSpec Polling Exception.
*Query name: [BD_XPTO_NOTIFICA_XPTOSelect], Descriptor name: [BD_XPTO_NOTIFICA_PRICING.XPTO]. Polling the database for events failed on this iteration.*
Caused by JTS transaction was marked rollback only.
This exception is considered retriable, likely due to a communication failure. Polling will be attempted again next polling interval.
This is a BUG? Have Fix?
Tks,
Azevedo, Artur.

It looks like a database issue or a XA configuration issue? What database you're polling? Oracle? Sybase? Check if your database is supported...
Cheers,
Vlad

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