Release Notes for mongosync 1.13

1.13.1 Release

April 10, 2025

Issues Fixed:

• Fixed a bug introduced in mongosync 1.10 where mongosync failed to retry on some transient network errors, which could cause it to unnecessarily exit with an error.

New Features

• mongosync no longer requires you to fully disable the source cluster's balancer for migrations started with namespace filtering. Now, you only have to disable the balancer for collections within the namespace filter.

  You can leave the balancer enabled for collections outside the filter. The destination balancer still must be fully disabled for the duration of the migration.

  Note

  You don't need to disable the source balancer on individual collections. You can still disable the source balancer globally.

Platform Support

mongosync builds are now available for the following platforms:

• Ubuntu 22.04 and 24.04

• Amazon Linux 2023

Live Upgrades

Live upgrades from version 1.12 to 1.13 are supported.

Other Notes

Fixed Issues:

• Fixed a bug introduced in v1.0.0 where mongosync could exit gracefully (instead of crashing with a fatal level log) on some errors.

• Fixed a bug introduced in v1.11.0 where mongosync returned a confusing error when the user lacked sufficient permissions to enable destination-only write blocking by default.