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MongoDB Errors

This section helps you troubleshoot common MongoDB errors on the Appsmith platform.

503 - service unavailable

You may see 503 - Service Unavailable error on Appsmith.

503 - after upgrading Appsmith to v1.9.0

You may see this error after upgrading Appsmith to v1.9.0.

Error message

Appsmith server is unavailable. Please try again later.


If you are using the Appsmith platform and encounter a 503 - Service Unavailable error, it may be due to upgrading to Appsmith v1.9.0 and using an older version of MongoDB (before v5.0).


To fix this issue, upgrade your MongoDB to version 5.0. For more information, follow the steps detailed on MongoDB official documentation to Upgrade a Replica Set to 5.0.