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.

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

Key Summary T Created Updated Due Assignee Reporter P Status Resolution
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Planned KIP Content

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

 KIPJIRAComponentCommitter
1KIP-54: Sticky Partition Assignment Strategy KAFKA-2273 - Getting issue details... STATUS ConsumerJason Gustafson
2KIP-66: Single Message Transforms for Kafka Connect (items not included in 0.10.2.0) KAFKA-4714 - Getting issue details... STATUS ConnectEwen Cheslack-Postava
3KIP-82 - Add Record Headers KAFKA-4208 - Getting issue details... STATUS MultipleJason Gustafson
4KIP-98 - Exactly Once Delivery and Transactional Messaging

KAFKA-4815 - Getting issue details... STATUS

KAFKA-4816 - Getting issue details... STATUS

KAFKA-4817 - Getting issue details... STATUS

KAFKA-4818 - Getting issue details... STATUS

MultipleGuozhang Wang, Jason Gustafson, Jun Rao, Ismael Juma
5KIP-101 - Alter Replication Protocol to use Leader Epoch rather than High Watermark for Truncation

KAFKA-1211 - Getting issue details... STATUS

KAFKA-5036 - Getting issue details... STATUS

ReplicationJun Rao
6

KIP-106 - Change Default unclean.leader.election.enabled from True to False

KAFKA-5257 - Getting issue details... STATUS ControllerIsmael Juma
7KIP-107: Add purgeDataBefore() API in AdminClient KAFKA-4586 - Getting issue details... STATUS MultipleJiangjie Qin
8KIP-109: Old Consumer Deprecation KAFKA-3264 - Getting issue details... STATUS ConsumerIsmael Juma
9KIP-114: KTable state stores and improved semantics KAFKA-5045 - Getting issue details... STATUS StreamsGuozhang Wang
10KIP-115: Enforce offsets.topic.replication.factor upon __consumer_offsets auto topic creation KAFKA-3959 - Getting issue details... STATUS Request handlingEwen Cheslack-Postava
11KIP-117: Add a public AdminClient API for Kafka admin operations KAFKA-3265 - Getting issue details... STATUS Admin ClientIsmael Juma
12KIP-119: Drop Support for Scala 2.10 in Kafka 0.11 KAFKA-4422 - Getting issue details... STATUS BuildEwen Cheslack-Postava
13KIP-121: Add KStream peek method KAFKA-4720 - Getting issue details... STATUS StreamsGuozhang Wang
14KIP-122: Add Reset Consumer Group Offsets tooling KAFKA-4743 - Getting issue details... STATUS ToolsJason Gustafson
15KIP-123: Allow per stream/table timestamp extractor KAFKA-4144 - Getting issue details... STATUS StreamsGuozhang Wang
16KIP-124 - Request rate quotas KAFKA-4195 - Getting issue details... STATUS BrokerJun Rao
17KIP-126 - Allow KafkaProducer to split and resend oversized batches. KAFKA-3995 - Getting issue details... STATUS ClientsJoel Jacob Koshy
18KIP-128: Add ByteArrayConverter for Kafka Connect KAFKA-4783 - Getting issue details... STATUS ConnectEwen Cheslack-Postava
19KIP-129: Streams Exactly-Once Semantics

KAFKA-4923 - Getting issue details... STATUS

KAFKA-4986 - Getting issue details... STATUS

StreamsGuozhang Wang
20KIP-133: Describe and Alter Configs Admin APIs KAFKA-3267 - Getting issue details... STATUS AdminClientJun Rao
21KIP-134: Delay initial consumer group rebalance KAFKA-4925 - Getting issue details... STATUS Group CoordinatorGuozhang Wang
22KIP-136: Add Listener name to SelectorMetrics tags KAFKA-4982 - Getting issue details... STATUS MetricsIsmael Juma
23KIP-137: Enhance TopicCommand --describe to show topics marked for deletion KAFKA-4291 - Getting issue details... STATUS ToolsIsmael Juma
24KIP-140: Add administrative RPCs for adding, deleting, and listing ACLs KAFKA-3266 - Getting issue details... STATUS AdminClientIsmael Juma
25KIP-143: Controller Health Metrics KAFKA-5135 - Getting issue details... STATUS ControllerJun Rao
26KIP-144: Exponential backoff for broker reconnect attempts KAFKA-3878 - Getting issue details... STATUS ClientsIsmael Juma
27KIP-146 - Classloading Isolation in Connect KAFKA-3487 - Getting issue details... STATUS ConnectEwen Cheslack-Postava
28KIP-151 Expose Connector type in REST API KAFKA-4343 - Getting issue details... STATUS ConnectEwen Cheslack-Postava
29KIP-153: Include only client traffic in BytesOutPerSec metric KAFKA-5194 - Getting issue details... STATUS MetricsIsmael Juma
30KIP-154 Add Kafka Connect configuration properties for creating internal topics KAFKA-4667 - Getting issue details... STATUS ConnectEwen Cheslack-Postava
31KIP 155 - Add range scan for windowed state stores KAFKA-5192 - Getting issue details... STATUS StreamsGuozhang Wang
32KIP 156 Add option "dry run" to Streams application reset tool KAFKA-5166 - Getting issue details... STATUS StreamsGuozhang Wang

See Kafka Improvement Proposals for the full list of KIPs.

KIPs Bumped to Next Release

 KIPJIRAComponentCommitterNotes
1KIP-48 Delegation token support for Kafka KAFKA-1696 - Getting issue details... STATUS Security PR not available
2KIP-72: Allow putting a bound on memory consumed by Incoming request  KAFKA-4602 - Getting issue details... STATUS NetworkJun RaoIt was deemed safer to merge this to trunk early in the release cycle for the next release.
3KIP-81: Bound Fetch memory usage in the consumer KAFKA-4133 - Getting issue details... STATUS 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.
4KIP-112: Handle disk failure for JBOD KAFKA-4763 - Getting issue details... STATUS Broker Needs more review time and makes sense to be part of the same release as KIP-113.
5KIP-118: Drop Support for Java 7 KAFKA-4423 - Getting issue details... STATUS Build Postponed for a variety of reasons
6KIP-120: Cleanup Kafka Streams builder API KAFKA-3856 - Getting issue details... STATUS StreamsGuozhang WangUnable to review it in time for the feature freeze
7KIP-138: Change punctuate semantics KAFKA-5233 - Getting issue details... STATUS StreamsGuozhang WangHigh impact change that needs more time to review
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