Also see Breaking changes in 5.0.
- Important Note
- The 5.6.1 release of the Elastic Stack has an important fix for an issue affecting users upgrading with indexes created in Elasticsearch 2.x and earlier where Kibana becomes unavailable. We recommend that you upgrade to 5.6.1 to avoid the issue. You can read the details of the problem and about mitigation if you are already experiencing the issue in this forum post. If you are an Elastic Cloud user then Elastic Cloud support is working to mitigate this issue for you.
- Sets update_all_types when setting mapping #13991