This document is a community maintained roadmap of the upcoming releases and features (at a high level).
The document contains only estimations, no guaranteed feature / release dates. 

See also the time-based release model.

Last update: January 2016

Next scheduled release: 1.3.0
Feature freeze (branch forking):  1 May 2017
Code freeze (first voting RC):  15 May 2017
Release date: 26 May 2017 

Past releases

Flink 1.1 (August 2016)

• Session Windows and Allowed lateness
• Table API and SQL on Calcite
• Metrics system
• Scala API for CEP
• Graph generators and new Gelly library algorithms
• Continuous File Sources
• Kinesis Connector
• Cassandra Connector

Upcoming releases

Flink 1.2 (End of 2016)

• Dynamic Scaling / Key Groups (FLINK-3755) (Design Doc)
• Rescalable Non-Partitioned State (FLIP-8)
• Backwards compatible savepoints (FLINK-4797)

• Integrate Flink with Apache Mesos (FLINK-1984) (Design Doc)

• Secure Data Access (FLINK-3930) (Design Doc)
• Queryable State (FLINK-3779)
• Async I/O (FLIP-12)
• Metrics in Webinterface (FLIP-7)
• Kafka 0.10 support (FLINK-4035)
• Table API: Group Window Aggregates (FLINK-4691, FLIP-11)
• Table API: Scalar Functions (FLINK-3097)

Flink 1.3 (Q2 2017)

• New deployment and process model (FLIP-6)