Null Pointer Exception when invoking Database Adapter

Question

The error reads as follows
<2008-06-27 11:34:02,558> <ERROR> <p1.collaxa.cube.ws> <AdapterFramework::Outbound>
file:/u01/app/oracle/product/10.1.3/as_mid_2/bpel/domains/p1/tmp/.bpel_UpdateA_8.2_8821b67fbd12f5dd2a0d57af136ec99e.tmp/InsertA.wsdl
[ InsertAHis_ptt::insert(AHisCollection) ] - Could not invoke operation 'insert' against the 'Database Adapter' due to:
java.lang.NullPointerException
NB Just about the same process (minor differences in the payload) was launched at just about the same time, but that one did not cause an error.
The error happened two days after a release. It was the first invocation of the service
after that release. This may or may not have something to do with this error.
There was no database shutdown, only a restart of the application server
We cannot reproduce the error; this means that we don't have an extended log with more information on the error.
Do you have more information on errors like this one?
Thanx
Lebbol

Answer 1

Hi,
To use the ServiceControl you need to be in a container that supports controls. This is what will instantiate your control for you, and take care of the some of the services controls require.
So to use the ServiceControl you'll need to invoke it from another web service, a page flow, or another control.
If you need to invoke from a standard main program, one option would be to use a standard WLS JAX-RPC client. This can be generated with their <clientgen> ant task.
Hope this helps.
-Chris