Release Dates

• KIP Freeze: May 10, 2017 (a KIP must be accepted by this date in order to be considered for this release)
• Feature Freeze: May 17, 2017 (major features merged & working on stabilization, minor features have PR, release branch cut; anything not in this state will be automatically moved to the next release in JIRA)
• Code Freeze: May 31, 2017 (first RC created now)
• Release: June 14, 2017 ♥

Release Manager
These dates are goals and subject to change, but we expect to stay on the Time Based Release Plan unless unexpected critical issues come up. While the target release date is fixed at ~2w after code freeze, RCs will roll out as needed until the release vote passes.

The release manager is Ismael Juma Juma.

Release Features

This is a list of key features/improvements/bugfixes that we can include with release notes (WIP):

• Exactly-once delivery and transactional messaging
• Streams exactly-once semantics
• AdminClient
• Record headers
• Request rate quotas
• Improved resiliency: replication protocol improvement and single-threaded controller

How to Contribute

Before code freeze:

• Participate in votes and discussions to land or postpone the open KIPs
• Review patches. We anticipate that this release will be bottlenecked mostly on reviews. The more reviewers, the more content we can fit in.
• Write system tests. We want to preserve the tradition of high-quality releases in Apache Kafka. 

After code freeze:

• Test the release candidates
• Open bugs on important issues found
• Fix bugs
• Review bug fixes
• Vote on RCs. Even though only PMC votes are binding, community votes are super important as we evaluate the readiness of the release

Open Issues

Planned KIP Content

Note: The planned content is not binding - final content will be based the features committed by branch-cutting date.

	KIP	JIRA	Component	Committer
1	KIP-54: Sticky Partition Assignment Strategy		Consumer	Jason Gustafson
2	KIP-66: Single Message Transforms for Kafka Connect (items not included in 0.10.2.0)		Connect	Ewen Cheslack-Postava
3	KIP-82 - Add Record Headers		Multiple	Jason Gustafson
4	KIP-98 - Exactly Once Delivery and Transactional Messaging		Multiple	guozhang Wang, Jason Gustafson, Jun Rao, Ismael Juma Juma
5	KIP-101 - Alter Replication Protocol to use Leader Epoch rather than High Watermark for Truncation		Replication	Jun Rao
6	KIP-106 - Change Default unclean.leader.election.enabled from True to False		Controller	Ismael Juma Juma
7	KIP-107: Add purgeDataBefore() API in AdminClient		Multiple	Jiangjie Qin
8	KIP-109: Old Consumer Deprecation		Consumer	Ismael Juma Juma
9	KIP-114: KTable state stores and improved semantics		Streams	guozhang Wang
10	KIP-115: Enforce offsets.topic.replication.factor upon __consumer_offsets auto topic creation		Request handling	Ewen Cheslack-Postava
11	KIP-117: Add a public AdminClient API for Kafka admin operations		Admin Client	Ismael Juma Juma
12	KIP-119: Drop Support for Scala 2.10 in Kafka 0.11		Build	Ewen Cheslack-Postava
13	KIP-121: Add KStream peek method		Streams	guozhang Wang
14	KIP-122: Add Reset Consumer Group Offsets tooling		Tools	Jason Gustafson
15	KIP-123: Allow per stream/table timestamp extractor		Streams	guozhang Wang
16	KIP-124 - Request rate quotas		Broker	Jun Rao
17	KIP-126 - Allow KafkaProducer to split and resend oversized batches.		Clients	Joel Koshy
18	KIP-128: Add ByteArrayConverter for Kafka Connect		Connect	Ewen Cheslack-Postava
19	KIP-129: Streams Exactly-Once Semantics		Streams	guozhang Wang
20	KIP-133: Describe and Alter Configs Admin APIs		AdminClient	Jun Rao
21	KIP-134: Delay initial consumer group rebalance		Group Coordinator	guozhang Wang
22	KIP-136: Add Listener name to SelectorMetrics tags		Metrics	Ismael Juma Juma
23	KIP-137: Enhance TopicCommand --describe to show topics marked for deletion		Tools	Ismael Juma Juma
24	KIP-140: Add administrative RPCs for adding, deleting, and listing ACLs		AdminClient	Ismael Juma Juma
25	KIP-143: Controller Health Metrics		Controller	Jun Rao
26	KIP-144: Exponential backoff for broker reconnect attempts		Clients	Ismael Juma Juma
27	KIP-146 - Classloading Isolation in Connect		Connect	Ewen Cheslack-Postava
28	KIP-151 Expose Connector type in REST API		Connect	Ewen Cheslack-Postava
29	KIP-153: Include only client traffic in BytesOutPerSec metric		Metrics	Ismael Juma Juma
30	KIP-154 Add Kafka Connect configuration properties for creating internal topics		Connect	Ewen Cheslack-Postava
31	KIP 155 - Add range scan for windowed state stores		Streams	guozhang Wang
32	KIP 156 Add option "dry run" to Streams application reset tool		Streams	guozhang Wang

See Kafka Improvement Proposals for the full list of KIPs.

KIPs Bumped to Next Release

	KIP	JIRA	Component	Committer	Notes
1	KIP-48 Delegation token support for Kafka		Security		PR not available
2	KIP-72: Allow putting a bound on memory consumed by Incoming request		Network	Jun Rao	It was deemed safer to merge this to trunk early in the release cycle for the next release.
3	KIP-81: Bound Fetch memory usage in the consumer		Consumer		Has a dependency on KIP-72 (which is still in progress) and there is no PR available, seems prudent to postpone it to the subsequent release.
4	KIP-112: Handle disk failure for JBOD		Broker		Needs more review time and makes sense to be part of the same release as KIP-113.
5	KIP-118: Drop Support for Java 7		Build		Postponed for a variety of reasons
6	KIP-120: Cleanup Kafka Streams builder API		Streams	guozhang Wang	Unable to review it in time for the feature freeze
7	KIP-138: Change punctuate semantics		Streams	guozhang Wang	High impact change that needs more time to review