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We will bump this release version  to 1.0.0, and also starting in this release we will have a slight difference in the version numbers such that:

  1. We will use three digits instead of four for the release versions:
  2. The first digit would indicate the major revision (starting at 1), and second indicating minor revision, and the last one number indicating the bug-fix revision; when preparing RCs of the release we will still suffix it after the release version number. I.e. major.minor.bug-fix[-rc_number]

Release Dates

  • KIP Freeze: Sept 13, 2017 (a KIP must be accepted by this date in order to be considered for this release)
  • Feature Freeze: Sept 20, 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: Oct 4, 2017 (first RC created now)
  • Release: JTBD


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 Guozhang Wang.

Release Features

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

  • Java 9 support with significantly faster TLS and CRC32C implementations
  • JBOD improvements: disk failure disables the failed disk instead of the broker (KIP-112/KIP-113 part 1)
  • Idempotent producer supports a maximum of 5 in-flight requests per connection instead of 1
  • Improved metrics (KIP-164, KIP-168, KIP-187, KIP-188, KIP-196) and logging
  • Improve diagnostics for SASL and SSL authentication failures (KIP-152)
  • Kafka Streams API improvements (KIP-120 / 130 / 138 / 150 / 160 / 161), and drop compatibility "Evolving" annotations 

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 unit/integration/system tests. We want to preserve the tradition of high-quality releases in Apache Kafka. 

After code freeze:

  • Write more unit/integration/system testsWe want to preserve the tradition of high-quality releases in Apache Kafka.
  • Improve documentation
  • Test the release candidates
  • Open blocker JIRAs on critical issues found. Open non-blocker JIRAs on any other issues found.
  • Fix critical 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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Also feel free to refer to this release page for more details of the included tickets.

 

Planned KIP Content

Note: The planned content is not binding - final content will be based the features committed by branch-cutting date. See Kafka Improvement Proposals for the full list of KIPs.

 KIPJIRAComponentCommitter
1KIP-72: Allow putting a bound on memory consumed by Incoming request  KAFKA-4602 - Getting issue details... STATUS NetworkJun Rao
2KIP-112: Handle disk failure for JBOD KAFKA-4763 - Getting issue details... STATUS Broker Jun Rao
3KIP-113: Support replicas movement between log directories (part 1)

KAFKA-5694 - Getting issue details... STATUS

Broker

 Jun Rao

Jiangjie Qin

4KIP-120: Cleanup Kafka Streams builder API KAFKA-3856 - Getting issue details... STATUS StreamsGuozhang Wang
5KIP 130: Expose states of active tasks to KafkaStreams public API KAFKA-4819 - Getting issue details... STATUS StreamsGuozhang Wang
6KIP-138: Change punctuate semantics KAFKA-5233 - Getting issue details... STATUS StreamsDamian Guy
7KIP-152 - Improve diagnostics for SASL authentication failures KAFKA-4764 - Getting issue details... STATUS Security

Jun Rao (broker)

Rajini Sivaram (client)

8

KIP 157 - Add consumer config options to streams reset tool

KAFKA-5225 - Getting issue details... STATUS StreamsDamian Guy
9KIP-160: Augment KStream.print(), KStream.writeAsText() KAFKA-4830 - Getting issue details... STATUS StreamsDamian Guy
10KIP-161: streams deserialization exception handlers KAFKA-5157 - Getting issue details... STATUS StreamsDamian Guy
11KIP-162: Enable topic deletion by default KAFKA-5384 - Getting issue details... STATUS AdminGwen Shapira
12KIP-163: Lower the Minimum Required ACL Permission of OffsetFetch KAFKA-4585 - Getting issue details... STATUS SecurityEwen Cheslack-Postava
13KIP-164- Add UnderMinIsrPartitionCount and per-partition UnderMinIsr metrics KAFKA-5341 - Getting issue details... STATUS BrokerEwen Cheslack-Postava
14KIP-167: Add interface for the state store restoration process KAFKA-5363 - Getting issue details... STATUS StreamsGuozhang Wang
15KIP-168: Add GlobalTopicCount and GlobalPartitionCount metric per cluster KAFKA-5461 - Getting issue details... STATUS BrokerJason Gustafson
16KIP-173: Add prefix to StreamsConfig to enable setting default internal topic configs KAFKA-3741 - Getting issue details... STATUS StreamsDamian Guy
17KIP-177: Consumer perf tool should count rebalance time KAFKA-5358 - Getting issue details... STATUS ToolingJason Gustafson
18KIP-182: Reduce Streams DSL overloads and allow easier use of custom storage engines KAFKA-5651 - Getting issue details... STATUS StreamsGuozhang Wang
19KIP-187 - Add cumulative count metric for all Kafka rate metrics KAFKA-5738 - Getting issue details... STATUS MetricsIsmael Juma
20KIP-188 - Add new metrics to support health checks KAFKA-5746 - Getting issue details... STATUS MetricsIsmael Juma
21KIP-189: Improve principal builder interface and add support for SASL KAFKA-5783 - Getting issue details... STATUS BrokerRajini Sivaram
22KIP-190: Handle client-ids consistently between clients and brokers KAFKA-5735 - Getting issue details... STATUS BrokerRajini Sivaram
23KIP-191: KafkaConsumer.subscribe() overload that takes just Pattern KAFKA-5726 - Getting issue details... STATUS ConsumerJason Gustafson
24KIP-192 : Provide cleaner semantics when idempotence is enabled KAFKA-5793 - Getting issue details... STATUS Producer/BrokerJason Gustafson
25KIP-195: AdminClient.createPartitions KAFKA-5856 - Getting issue details... STATUS AdminIsmael Juma
26KIP-196: Add metrics to Kafka Connect framework KAFKA-2376 - Getting issue details... STATUS ConnectEwen Cheslack-Postava
27KIP-197 Connect REST API should include the connector type when describing a connector KAFKA-5657 - Getting issue details... STATUS ConnectEwen Cheslack-Postava
28KIP-198: Remove ZK dependency from Streams Reset Tool KAFKA-5862 - Getting issue details... STATUS ToolingGuozhang Wang
29KIP-202 Move merge() from StreamsBuilder to KStream KAFKA-5765 - Getting issue details... STATUS StreamsGuozhang Wang

Postponed to subsequent release

 

 

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