The message is, by itself, a sign of a healthy, communicative relationship between GoldenGate and the Oracle Database. It confirms that the session ended without leaving "zombie" processes or orphaned locks in the database.
This implies the detachment was involuntary. Something—like a database crash, a memory exhaustion issue (SGA/Streams Pool), or a permissions change—forced the client off. Troubleshooting Forced Detachments The message is, by itself, a sign of
Oracle GoldenGate uses an process to capture changes from the source database. In modern "Integrated Capture" modes, the Extract process acts as a client to a specialized background process within the Oracle Database known as the LogMiner Capture process. Something—like a database crash, a memory exhaustion issue
Integrated Capture lives in the Streams Pool. If the STREAMS_POOL_SIZE is too small, the database may kick the GoldenGate client to save system stability. Integrated Capture lives in the Streams Pool