DBAdapter for SQL Server Caused by java.sql.SQLException: [FMWGEN][SQLServe

Question

Have Oracle SOA 11.1.1.5 composite that does insert/update on SQL Server table. Using DBAdapter to connect to SQL Server for this insert/update. Number of instances is huge so every now and then getting the below error. Have another composite that does that same but in Oracle Table but never run into the below issues it's only with SQL Server database giving the below errors very often. Any idea on how to resolve this issue what could be the cause
don't know why it throws this error *Descriptor name: [UpdateSQLServer.TableName]. Caused by java.sql.SQLException: [FMWGEN][SQLServer JDBC Driver]Object has been closed..* is there any issue with DBAdapter for SQL Server or is it a load issue as I don't see this with oracle tables
CompositeNameService 16415534 remoteFault com.oracle.bpel.client.BPELFault:
faultName: {{http://schemas.oracle.com/bpel/extension}remoteFault}
messageType: {{http://schemas.oracle.com/bpel/extension}RuntimeFaultMessage}
parts: {{ summary=Exception occured when binding was invoked.
Exception occured during invocation of JCA binding: "JCA Binding execute of Reference operation 'update' failed due to: DBWriteInteractionSpec Execute Failed Exception. update failed.
Descriptor name: [UpdateSQLServer.TableName]. Caused by java.sql.SQLException: [FMWGEN][SQLServer JDBC Driver]Object has been closed..
Please see the logs for the full DBAdapter logging output prior to this exception.
This exception is considered retriable, likely due to a communication failure. To classify it as non-retriable instead add property nonRetriableErrorCodes with value "0" to your
deployment descriptor (i.e. weblogic-ra.xml). To auto retry a retriable fault set these composite.xml properties for this invoke: jca.retry.interval, jca.retry.count, and
jca.retry.backoff. All properties are integers. ". The invoked JCA adapter raised a resource exception. Please examine the above error message carefully to determine a resolution. ,
detail=[FMWGEN][SQLServer JDBC Driver]Object has been closed. ,code=0} Any help is appreciated.
Thanks

Answer 1

Hi,
Currently "Test Connections On Reserve" is unchecked but wondering what benefit will it give if I make it selected anyways if it fails still the Process will error out or does it holds the process till the connection is available and then continues. Will there be a performance hit. As currently the volume is very high and if selecting the above then for each instance it will check first if connection is available and does it affect on the performance or anything else
Also "Connection Reserve Timeout:" is set to 10 seconds.
Thanks