Using NB 6.1 patch2:
Create simple Bpel with first invoke to SQL se and second invoke to XSLT se.
Create Composite project and deploy. 
When test is run Bpel returns following error:
    <SOAP-ENV:Fault>
      <faultcode xmlns="">SOAP-ENV:Server</faultcode>
      <faultstring xmlns="">java.lang.Exception: Processing Error. Fault Name is
{http://sun.com/wsbpel/2.0/process/executable/fault}systemFault and Fault Value is
{http://sun.com/wsbpel/2.0/process/executable/fault}systemFault</faultstring>
      <faultactor xmlns="">sun-http-bc</faultactor>
    </SOAP-ENV:Fault>

Glassfish log reads error "Failed to send InOut message" at first invoke to SQL engine. 

Restart GlassFish.
Run Bpel again and works OK and every time since restart.
Same failure occurs with Sun Java System Application Server 9.1 update 2, too.