Error
Error Code:
260
MongoDB Error 260: Invalid Resume Token
Description
Error 260, 'Invalid Resume Token', indicates that a resume token provided to a MongoDB change stream or replication operation is no longer valid. This typically occurs when attempting to restart an operation from a point in time that is no longer available in the oplog or due to significant changes in the database state.
Error Message
Invalid Resume Token
Known Causes
4 known causesOplog Window Exceeded
The resume token refers to an operation that has been removed from the oplog, typically due to the oplog's fixed size being exceeded over time.
Collection or Database Recreated
The change stream was initiated on a collection or database that has since been dropped and recreated, invalidating any prior resume tokens.
Mismatched Change Stream Target
A resume token from one change stream (e.g., for a specific collection) is incorrectly used to resume a different change stream (e.g., for another collection or database).
Replica Set Topology Change
Significant changes to the replica set's configuration or a primary election might invalidate older resume tokens, especially if data was rolled back.
Solutions
4 solutions available1. Restart the MongoDB Service easy
A simple restart can resolve transient issues with resume tokens.
1
On Linux systems, use the `systemctl` command to restart the MongoDB service. Replace `mongod` with your specific service name if it differs.
sudo systemctl restart mongod2
On Windows systems, open the Services console (services.msc), locate the MongoDB service, and click 'Restart'. Alternatively, use PowerShell.
Restart-Service MongoDB2. Verify and Re-obtain the Resume Token medium
The resume token might be corrupted or expired. Re-fetching it is a robust solution.
1
Identify the operation that generated the resume token (e.g., change stream, oplog query).
2
If using change streams, close the existing change stream cursor and open a new one. The initial `aggregate` command for the change stream can be used to obtain a fresh resume token.
db.collection.watch([{ $match: { operationType: 'insert' } }], { resumeAfter: <previous_invalid_token> })3
If querying the oplog directly, ensure you are using a valid starting point. Consider re-querying from a known good timestamp or the beginning of the relevant time window if the token is lost or corrupted.
4
When using a client application, ensure it is properly handling resume token management. If the client is responsible for storing and re-using tokens, check its logic for errors.
3. Check for MongoDB Version Compatibility and Known Issues medium
Older MongoDB versions or specific patch releases might have bugs related to resume tokens.
1
Determine the exact MongoDB version you are running.
db.version()2
Consult the MongoDB release notes and documentation for your specific version and any subsequent patch releases. Search for known issues related to 'resume token' or the specific operation you are performing (e.g., change streams).
3
If a known bug is identified that affects resume token functionality, consider upgrading to a stable, patched version of MongoDB that addresses the issue. Always test upgrades in a non-production environment first.
4. Inspect and Clean Corrupted Resume Tokens advanced
Manually examine and potentially remove invalid resume tokens from persistent storage.
1
Understand where your application or system is storing resume tokens. This could be in a separate collection, a configuration file, or within the application's memory.
2
If tokens are stored in a MongoDB collection, connect to the database and query that collection to inspect the stored tokens. Look for any obvious formatting errors or inconsistencies.
db.<your_token_collection>.find()3
If you identify a corrupted token, consider deleting it. This will force the system to re-initialize and obtain a new, valid resume token from the source (e.g., the oplog). Be cautious, as this might cause a slight disruption or data loss if not handled correctly.
db.<your_token_collection>.deleteOne({ _id: <id_of_corrupted_token> })4
If tokens are stored externally, consult your application's documentation for how to manage and reset these tokens. This might involve clearing cache entries or re-initializing configuration.