Cause: On the primary system, the log stream has been ended by the ALTER DATABASE COMMIT TO SWITCHOVER TO LOGICAL STANDBY command. See the solution below.
Error solution: Issue one of the following commands to make this standby a primary or resume applying changes from a new primary. ALTER DATABASE COMMIT TO SWITCHOVER TO LOGICAL PRIMARY; ALTER DATABASE START LOGICAL STANDBY APPLY NEW PRIMARY dblink;
Database version: Oracle 11g Release 2 (11.2)