The current Run Id is mutable and can change during a Workflow Retry. You should not rely on storing the current Run Id, or using it for any logical choices, because a Workflow Retry changes the Run Id and can lead to non-determinism issues.

We added support for Elasticsearch v7+ (ES7) in the v1.7.0 update to the Temporal Server. Elasticsearch v7 introduces several breaking changes, including the removal of mapping types. These changes make Elasticsearch v6 incompatible with Elasticsearch v7.

This page highlights the key differences between Cadence and Temporal that you will need to account for when migrating.