Error "Reader: 11000 - sp_ordr failed: Can't read capture queue (que_SHMERR: Shared memory error)" (4300574)

The following errors are observed when Read stops due to error:

Info     2015-11-24 13:35:18.755221 18666 1 Reader exited with code=1, pid = 18716  (from server_name)

Error    2015-11-24 13:35:16.360060 18716 1 Reader stopped: Internal error encountered; cannot continue  (from server_name)

Error    2015-11-24 13:35:16.359376 18716 1 Reader: 11000 - sp_ordr failed: Can't read capture queue (que_SHMERR: Shared memory error)  (from server_name) [module ord]

Notice   2015-11-24 13:35:16.359177 18716 1 Reader: bu_gcb got NULL buffer pos = 2972162883584  (from server_name) [module que]

At that time Capture is behind Oracle and has a very large # of messages in it. There are no error messages in the Read log. Restarting Read is not helping so long as Capture is behind Oracle.