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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

key summary type created updated due assignee reporter priority status resolution

JQL and issue key arguments for this macro require at least one Jira application link to be configured

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 Unable to render Jira issues macro, execution error. ConsumerJason Gustafson
2KIP-72: Allow putting a bound on memory consumed by Incoming request  Unable to render Jira issues macro, execution error. NetworkJun Rao
3KIP-82 - Add Record Headers Unable to render Jira issues macro, execution error. MultipleJason Gustafson
4KIP-98 - Exactly Once Delivery and Transactional Messaging

Unable to render Jira issues macro, execution error.

Unable to render Jira issues macro, execution error.

Unable to render Jira issues macro, execution error.

Unable to render Jira issues macro, execution error.

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

Unable to render Jira issues macro, execution error.

Unable to render Jira issues macro, execution error.

ReplicationJun Rao
6

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

Unable to render Jira issues macro, execution error. ControllerIsmael Juma Juma
7KIP-107: Add purgeDataBefore() API in AdminClient Unable to render Jira issues macro, execution error. MultipleJiangjie Qin
8KIP-109: Old Consumer Deprecation Unable to render Jira issues macro, execution error. ConsumerJason Gustafson
9KIP-112: Handle disk failure for JBOD Unable to render Jira issues macro, execution error. BrokerTBD
10KIP-114: KTable state stores and improved semantics Unable to render Jira issues macro, execution error. Streamsguozhang Wang
11KIP-115: Enforce offsets.topic.replication.factor upon __consumer_offsets auto topic creation Unable to render Jira issues macro, execution error. Request handlingEwen Cheslack-Postava
12KIP-117: Add a public AdminClient API for Kafka admin operations Unable to render Jira issues macro, execution error. Admin ClientIsmael Juma Juma
13KIP-119: Drop Support for Scala 2.10 in Kafka 0.11 Unable to render Jira issues macro, execution error. BuildEwen Cheslack-Postava
14KIP-121: Add KStream peek method Unable to render Jira issues macro, execution error. Streamsguozhang Wang
15KIP-122: Add Reset Consumer Group Offsets tooling Unable to render Jira issues macro, execution error. ToolsJason Gustafson
16KIP-123: Allow per stream/table timestamp extractor Unable to render Jira issues macro, execution error. Streamsguozhang Wang
17KIP-124 - Request rate quotas Unable to render Jira issues macro, execution error. BrokerJun Rao
18KIP-126 - Allow KafkaProducer to split and resend oversized batches. Unable to render Jira issues macro, execution error. ClientsJoel Koshy
19KIP-128: Add ByteArrayConverter for Kafka Connect Unable to render Jira issues macro, execution error. ConnectEwen Cheslack-Postava
20KIP-129: Streams Exactly-Once Semantics

Unable to render Jira issues macro, execution error.

Unable to render Jira issues macro, execution error.

Streamsguozhang Wang
21KIP-133: Describe and Alter Configs Admin APIs Unable to render Jira issues macro, execution error. AdminClientJun Rao
22KIP-134: Delay initial consumer group rebalance Unable to render Jira issues macro, execution error. Group Coordinatorguozhang Wang
23KIP-136: Add Listener name to SelectorMetrics tags Unable to render Jira issues macro, execution error. MetricsIsmael Juma Juma
24KIP-137: Enhance TopicCommand --describe to show topics marked for deletion Unable to render Jira issues macro, execution error. ToolsIsmael Juma Juma
25KIP-138: Change punctuate semantics Unable to render Jira issues macro, execution error. Streamsguozhang Wang
26KIP-140: Add administrative RPCs for adding, deleting, and listing ACLs Unable to render Jira issues macro, execution error. AdminClientIsmael Juma Juma
27KIP-143: Controller Health Metrics Unable to render Jira issues macro, execution error. ControllerJun Rao
28KIP-144: Exponential backoff for broker reconnect attempts Unable to render Jira issues macro, execution error. ClientsIsmael Juma Juma
29KIP-146 - Classloading Isolation in Connect Unable to render Jira issues macro, execution error. ConnectEwen Cheslack-Postava
30KIP-151 Expose Connector type in REST API Unable to render Jira issues macro, execution error. ConnectEwen Cheslack-Postava
31KIP-153: Include only client traffic in BytesOutPerSec metric Unable to render Jira issues macro, execution error. MetricsIsmael Juma Juma
32KIP-154 Add Kafka Connect configuration properties for creating internal topics Unable to render Jira issues macro, execution error. ConnectEwen Cheslack-Postava
33KIP 155 - Add range scan for windowed state stores Unable to render Jira issues macro, execution error. Streamsguozhang Wang
34KIP 156 Add option "dry run" to Streams application reset tool Unable to render Jira issues macro, execution error. 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 Unable to render Jira issues macro, execution error. Security PR not available
2KIP-81: Bound Fetch memory usage in the consumer Unable to render Jira issues macro, execution error. 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.
3KIP-118: Drop Support for Java 7 in Kafka 0.11 Unable to render Jira issues macro, execution error. Build Postponed for a variety of reasons
4KIP-120: Cleanup Kafka Streams builder API Unable to render Jira issues macro, execution error. Streamsguozhang WangUnable to review it in time for the feature freeze
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