Release Notes - Flink 1.6

These release notes discuss important aspects, such as configuration, behavior, or dependencies, that changed between Flink 1.5 and Flink 1.6. Please read these notes carefully if you are planning to upgrade your Flink version to 1.6.

Changed Configuration Default Values

The default value of the slot idle timeout slot.idle.timeout is set to the default value of the heartbeat timeout (50 s).

Changed ElasticSearch 5.x Sink API

Previous APIs in the Flink ElasticSearch 5.x Sink’s RequestIndexer interface have been deprecated in favor of new signatures. When adding requests to the RequestIndexer, the requests now must be of type IndexRequest, DeleteRequest, or UpdateRequest, instead of the base ActionRequest.

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