Ram K. answered 07/16/19
SQL | Oracle | Calculus | Algebra
If this does not always happen and it is sporadic, it may not be a bug, most likely a network error.
There are many bugs associated with the ORA-44756 error, and there is always the likelihood that the root cause of the error was due to a network failure.
When Oracle makes a distributed update, he updates BOTH databases before committing the first update
When you lose connectivity between distributed updates you get entries in the dba_2pc_pending table.