MongoDB · January 2, 2024

How to fix MongoDB Error Code - 119 - InvalidSyncSource

How to Fix MongoDB Error Code - 119 - InvalidSyncSource

MongoDB is a popular open-source NoSQL database management system that offers high performance, scalability, and flexibility. However, like any software, it can encounter errors that need to be resolved. One such error is MongoDB Error Code - 119 - InvalidSyncSource. In this article, we will explore the causes of this error and provide step-by-step instructions on how to fix it.

Understanding MongoDB Error Code - 119 - InvalidSyncSource

MongoDB Error Code - 119 - InvalidSyncSource occurs when a replica set member tries to sync from a source that is not a valid member of the replica set. This error typically happens when a replica set member is unable to find a valid sync source to replicate data from.

There are several reasons why this error may occur:

  • The replica set configuration is incorrect.
  • The sync source specified in the replica set configuration is not reachable.
  • The sync source specified in the replica set configuration is not a valid member of the replica set.

Fixing MongoDB Error Code - 119 - InvalidSyncSource

To fix MongoDB Error Code - 119 - InvalidSyncSource, follow these steps:

Step 1: Verify Replica Set Configuration

Start by verifying the replica set configuration. Connect to the primary node of the replica set using the MongoDB shell or a MongoDB client. Run the following command to check the replica set configuration:

rs.conf()

Ensure that the configuration includes all the replica set members and that the sync source is correctly specified.

Step 2: Check Sync Source Reachability

If the replica set configuration appears to be correct, check the reachability of the sync source. Ping the sync source from the replica set member encountering the error to ensure it is reachable. If the sync source is not reachable, update the replica set configuration to specify a reachable sync source.

Step 3: Verify Sync Source Membership

If the sync source is reachable, verify that it is a valid member of the replica set. Connect to the sync source using the MongoDB shell or a MongoDB client and run the following command:

rs.isMaster()

Ensure that the output includes the replica set name and the sync source is listed as a member of the replica set.

Step 4: Reconfigure the Replica Set

If the sync source is not a valid member of the replica set, you need to reconfigure the replica set. Connect to a valid member of the replica set and run the following command:

rs.reconfig()

Follow the prompts to reconfigure the replica set, ensuring that the sync source is correctly specified.

Summary

In conclusion, MongoDB Error Code - 119 - InvalidSyncSource occurs when a replica set member tries to sync from a source that is not a valid member of the replica set. To fix this error, verify the replica set configuration, check the sync source reachability, and ensure the sync source is a valid member of the replica set. By following these steps, you can resolve the MongoDB Error Code - 119 - InvalidSyncSource and ensure the smooth operation of your MongoDB replica set.

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