ORA-28239: no key provided in Mail Queue

Question

Hi,
I try send mail from APEX (apex_mail.send) and I have in Manage Instance -> Manage Meta Data -> Mail Queue list of mails with error: ORA-28239: no key provided
Oracle Docs give the following recommendation:
ORA-28239: no key provided
Cause: A NULL value was passed in as an encryption or decryption key.
Action: Provide a non-NULL value for the key.
Where do I 'Provide' the non-NULL value and where is this derived?

Answer 1

The apply instantiation scn is independent of capture mode (Sync or redo log). When you set an apply instantiation scn, you are telling the apply process the source scn at which the instantiation occurred.
Use the procedure dbms_apply_adm.set_table_instantiation_scn (see http://download.oracle.com/docs/cd/E11882_01/appdev.112/e16760/d_apply.htm#i997895)
You may want to look at the 2Day+ Data Replication and Integration book for an example on initial configuration (chapter 4) and extending a Streams environment (chapter 5). Look for the tutorial for sync capture in each chapter. The 11.1 version of the 2Day+ book performs most tasks with pl/sql while the 11.2 version utilizes EM Grid Control for most operations.
11.2 2Day+ Data Replication and Integration: http://download.oracle.com/docs/cd/E11882_01/server.112/e17516/toc.htm
11.1 2Day+ Data Replication and Integration: http://download.oracle.com/docs/cd/B28359_01/server.111/b28324/toc.htm