Ogg Capture Client Success((link)) Fully Detached From Goldengate Capture Jun 2026

In Oracle GoldenGate (OGG), the message "OGG capture client successfully detached from GoldenGate capture" is generally a positive status update rather than an error. It signifies that a "capture client" (typically an process) has cleanly disconnected from the underlying Logmining Server in the database. This usually happens during a controlled shutdown or a planned restart of the Extract process. Review: OGG Capture Client Detachment Status Status Summary: Message Type: Informational / Lifecycle Significance: High. It confirms that the integrated capture process didn't just crash; it successfully communicated its departure to the database's logmining server. Process Impact: None (if intentional). The database will now hold onto the required redo logs until the client re-attaches, preventing data loss. Common Scenarios for this Message: Manual Stop: You issued a STOP EXTRACT command in GGSCI. Maintenance: The database is shutting down, and OGG processes are detaching to preserve state. Automated Restarts: A script or manager process is recycling the Extract for performance or log rotation reasons. What to Check if this was Unexpected: Alert Logs: Oracle Alert Log for corresponding SHUTTING DOWN WAITING FOR CLIENT REQUESTS messages from the V$GOLDENGATE_CAPTURE Report Files: VIEW REPORT command to see if a fatal error occurred the detachment. Process Status: INFO EXTRACT to verify if the process is Was this detachment part of a planned maintenance window, or did it happen unexpectedly during live replication? Root Cause for Database Shutdown - Oracle Forums Either Oracle is correct & client is mistaken. or. Client is correct & Oracle has a bug & you need to submit Bug Report to Oracle. Oracle Forums V$GOLDENGATE_CAPTURE - Oracle Help Center

The message "OGG Capture client successfully detached from GoldenGate Capture" is a standard informational log entry indicating that a GoldenGate Extract process (the client) has safely disconnected from the database's Logmining Server .   What This Means   In an Integrated Capture environment, the Extract process does not read redo logs directly; instead, it "attaches" to a Logmining Server within the Oracle database. This "detached" message typically appears in the database alert logs when the Extract stops normally or is manually shut down using the STOP EXTRACT command.   Common Scenarios   Routine Maintenance : You manually issued a STOP EXTRACT command in GGSCI to perform maintenance or update parameters. Database Shutdown : The database was shut down (e.g., for patching), forcing all attached capture clients to detach as their host server was terminating. Process Abend : If this message is preceded by an "ERROR" or "PROCESS ABENDING" in the GoldenGate report file, it means the Extract encountered a critical failure (like a missing log file or permission issue) and detached as part of its failure sequence.   Next Steps for Troubleshooting   If this detachment was unintentional , follow these steps to find the root cause:   Check the GoldenGate Report File : Look at the .rpt file for the specific Extract group in the dirrpt directory to see if it recorded an error (e.g., OGG-01668 or OGG-02028 ) just before detaching. Verify Database Health : Review the Oracle Database Alert Log for related errors like ORA-03113 (end-of-file on communication channel) or ORA-00600 , which would indicate the Logmining server itself crashed. Check Capture Status : Run select capture_name, state from dba_capture; in the database to see if the underlying capture process is still active or has also stopped.   Root Cause for Database Shutdown - Oracle Forums

Understanding the "OGG Capture Client Successfully Detached" Message In the world of Oracle GoldenGate (OGG), log messages are the primary window into the health and status of your data replication environment. One message that often appears in the ggserr.log—and occasionally causes confusion for administrators—is: "OGG capture client successfully detached from GoldenGate capture." While this message sounds like a failure notification, it is actually a standard operational status update. This article explores what this message means, why it occurs, and how to troubleshoot it if it happens unexpectedly. What Does This Message Mean? Oracle GoldenGate uses a "Capture" process (also known as Extract) to pull changed data from source database transaction logs. To do this efficiently, especially in Integrated Capture mode, the OGG Extract process registers as a client with the database’s logmining server. The "detached" message signifies that the communication link between the GoldenGate Extract process and the underlying database capture engine has been cleanly severed. In simpler terms, the client (GoldenGate) told the server (the Database) it was finished, and the database acknowledged the disconnection. Common Scenarios for This Message 1. Graceful Shutdown The most common reason you see this message is a manual stop of the Extract process. When you issue the command STOP EXTRACT in GGSCI or Admin Client, the process finishes its current task and sends a detachment signal to the database to release resources. 2. Process Restart or Re-initialization If you change an Extract configuration and restart the process, it must detach from the old session before attaching to a new one. You will see the detachment message followed shortly by an "attached" message. 3. Heartbeat and Timeout Events In some Integrated Capture environments, if there is a long period of inactivity or a network "hiccup" between the GoldenGate instance and the database instance, the capture client may temporarily detach and reattach to refresh the session. 4. Extract Abends (Crashes) While the message says "successfully detached," it can sometimes appear during a crash. If the Extract hits a critical error (an "Abend"), it may still attempt to run its cleanup routines, which includes detaching from the database before the process terminates. Is This an Error? Usually, no. If you see this message in conjunction with a STOP command you initiated, it is a sign that GoldenGate is working exactly as intended. It confirms that the database has successfully reclaimed the memory and processes (Logminers) dedicated to that Extract. However, it is a red flag if: The message appears while the Extract status is still supposed to be RUNNING . The message is immediately followed by an ERROR or ABENDING status in the report file. It happens repeatedly (looping), preventing data from flowing. Troubleshooting Unexpected Detachments If your Capture client is detaching without your instruction, follow these steps to find the root cause: 1. Check the Extract Report File Navigate to your dirrpt directory and open the .rpt file for the specific Extract. Look for the lines immediately preceding the detachment. Often, a database-level error (like an ORA- error) is the true culprit. 2. Review the Database Alert Log Since Integrated Capture runs "inside" the database, the source database's alert log often contains the real reason for the disconnect. Look for issues related to: Streams Pool Size: If the STREAMS_POOL_SIZE is too small, the logminer may force a detachment. Logminer Errors: Look for ORA-01280 or similar errors. 3. Verify Extract Checkpoints Use INFO EXTRACT , SHOWCH to see if the Extract is stuck on a specific SCN (System Change Number). If it cannot find a required archived log, it may detach and wait. 4. Check Network Stability If the GoldenGate process is running on a different server than the database (Downstream Capture), ensure the SQL*Net connection is stable. Network timeouts can cause the capture client to drop the connection. The message "OGG capture client successfully detached from GoldenGate capture" is a confirmation of a clean break between GoldenGate and the Oracle Database. In the vast majority of cases, it is a healthy part of the process lifecycle. Only when it is accompanied by an "Abended" status should you dive into the report files and database logs to investigate further.

Guide: Troubleshooting "ogg capture client successfully detached from goldengate capture" Summary This message means an Oracle GoldenGate (OGG) capture client process detached (stopped receiving or disconnected) from the GoldenGate capture (extract) process. It can be benign (planned stop) or indicate issues (resource limits, network, file corruption, or configuration). The steps below help identify cause and restore normal capture. Immediate checks (do first) In Oracle GoldenGate (OGG), the message "OGG capture

Check GoldenGate logs

Extract/manager log (ggserr.log) and extract trace files for errors at the time of detachment.

Check OS process status

Confirm the capture/extract process is running (ps/top) and note any recent restarts.

Check network connectivity

If capture uses remote trail or remote pump, test network connectivity and latency between nodes (ping, traceroute). Review: OGG Capture Client Detachment Status Status Summary:

Check disk space and I/O

Verify disk usage and I/O errors on source and trail locations (df, iostat, dmesg).