I've researched elsewhere but not been able to identify a suitable
solution, so I'm asking here in the hopes that an ORDS aficionado might
provide some direction.
My issue is around the perception of a restart of ORDS being a requirement
to re-establishing a connection to an endpoint which may have been
unavailable for a period of time.
We run ORDS v20 on a Linux VM as part of a solution accompanying an Exadata
multitenant environment. ORDS is made available to all PDBs, installed in
the CDB. Within the 'conf' directory of ORDS - we stage all the associated
apex_aa.xml, apex_ab.xml, apex_ac.xml etc configuration mapping files.
Periodically, one of the PDB environments may be made unavailable (i.e
Closed or else RAC services stopped, or someone inadvertently locks the
ORDS_PUBLIC_USER account etc) for maintenance, for a day or weekend etc.
When this takes place, the pluggables ORDS_PUBLIC_USER database sessions
are terminated and the ORDS connection cannot be re-established for a
period of time to that PDB. So far so good.
Once the maintenance is complete, and the PDB is re-opened once again, RAC
services restarted, ORDS does not automatically re-establish a database
connection to that same PDB.
If I need to get the ORDS_PUBLIC_USER connections re-established once more
for that specific PDB, then I need to stop ORDS processes for all clients
i.e. This reads the url mapping xml and validates the associated
apex_aa.xml files etc., and eventually successfully re-establishes ALL the
database connection and all is good.
The difficulty is though, that we have literally hundreds of these PDBs in
a CDB, and literally hundreds of accompanying ORDS endpoints. So, if one of
these environments is impacted by a "maintenance" of some sort, and the
database connection is severed for a time, then it requires a full restart
of ORDS for ALL to get it back, which is rather painful.
There must be something I am missing right? I understand XML config changes
require a restart of ORDS to be picked up, but I find it troubling that a
full restart is also required when just one client endpoint connection out
of a hundred is impacted?
Is there any way I can force ORDS to 'reinit' and re-read the conf files to
re-establish a single broken connection with restarting?