> We have identified a bug in MongoDB that under very rare circumstances may incorrectly report a write as successful.
Version 2.4.9 will contain the fix for this bug and will be available in approximately 7 days. We strongly recommend upgrading your mongos processes as soon as this fix is released. A fix will also be made available in version 2.2.7 shortly thereafter.
For more information on the progress of this issue see: https://jira.mongodb.org/browse/SERVER-12146
If you have any questions, please contact us: