We are using Monstache v6.7.17 to sync data between MongoDB and Elasticsearch 8.3.2. Everything worked fine with MongoDB 3.6. However, after upgrading to MongoDB 7.0, we started experiencing issues: when updating some fields in a MongoDB document, the other fields seem to disappear from the document in Elasticsearch. The document itself still exists in Elasticsearch by _id, but I can’t see indexed fields due to _source: disabled.
Here is monstache configuration: