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KIP (please keep this sorted by KIP number)


1KIP-534: Reorganize checkpoint system in log cleaner to per partition WIP

KIP-532: Broker Consumer Lag metrics in size and time

23KIP-531: Drop support for Scala 2.11 in Kafka (WIP)
34KIP-528: Deprecate PartitionGrouper configuration and interface2.4.0
45KIP-525 - Return topic metadata and configs in CreateTopics response2.4.0 
56KIP-524: Allow users to choose config source when describing configs2.5.0 (WIP)
67KIP-521: Enable redirection of Connect's log4j messages to a file by default2.4.0
78KIP-517: Add consumer metrics to observe user poll behavior2.4.0
89KIP-511: Collect and Expose Client's Name and Version in the Brokers2.4.0 (WIP)/2.5.0(WIP)
910KIP-507: Securing Internal Connect REST Endpoints2.4.0
1011KIP-504 - Add new Java Authorizer Interface2.4.0 
1112KIP-503: Add metric for number of topics marked for deletion2.4.0 
1213KIP-500: Replace ZooKeeper with a Self-Managed Metadata Quorum
1314KIP-497: Add inter-broker API to alter ISR2.5.0 (WIP)
1415KIP-496: Administrative API to delete consumer offsets2.4.0 
1516KIP-495: Dynamically Adjust Log Levels in Connect2.4.0
1617KIP-492: Add java security providers in Kafka Security config2.4.0 
1718KIP-488: Clean up Sum,Count,Total Metrics2.4.0
1819KIP-484: Expose metrics for group and transaction metadata loading duration2.4.0 
1920KIP-482: The Kafka Protocol should Support Optional Tagged Fields2.4.0 
2021KIP-481: SerDe Improvements for Connect Decimal type in JSON2.4.0
2122KIP-480: Sticky Partitioner2.4.0
2223KIP-479: Add Materialized to Join2.4.0
2324KIP-476: Add Java AdminClient Interface2.4.0
2425KIP-475: New Metrics to Measure Number of Tasks on a Connector2.4.0
2526KIP-474: To deprecate WindowStore#put(key, value)2.4.0
2627KIP-471: Expose RocksDB Metrics in Kafka Streams

2.4.0 (partially implemented) / 2.5.0

2728KIP-470: TopologyTestDriver test input and output usability improvements2.4.0 
2829KIP-467: Augment ProduceResponse error messaging for specific culprit records2.4.0 (partially implemented) / 2.5.0
2930KIP-466: Add support for List<T> serialization and deserialization2.4.0 (WIP)
3031KIP-465: Add Consolidated Connector Endpoint to Connect REST API2.3.0
3132KIP-464: Defaults for AdminClient#createTopic2.4.0
3233KIP-462: Use local thread id for KStreams2.3.0
3334KIP-461: Improve Replica Fetcher behavior at handling partition failure2.3.0
3435KIP-460: Admin Leader Election RPC2.4.0
3536KIP-458: Connector Client Config Override Policy2.3.0
3637KIP-455: Create an Administrative API for Replica Reassignment2.4.0 (WIP)
3738KIP-454: Expansion of the ConnectClusterState interface2.3.0
3839KIP-453: Add close() method to RocksDBConfigSetter2.3.0
3940KIP-449: Add connector contexts to log messages in Connect workers 2.3.0
4041KIP-446: Add changelog topic configuration to KTable suppress2.5.0 (WIP)
4142KIP-445: In-memory Session Store2.3.0
4243KIP-444: Augment metrics for Kafka Streams2.4.0 (WIP)

KIP-443: Return to default and segment.index.bytes in Streams repartition topics

4445KIP-442: Return to default max poll interval in Streams2.3.0
4546KIP-440: Extend Connect Converter to support headers2.4.0
4647KIP-436: Add a metric indicating start time2.3.0
4748KIP-434: Add Replica Fetcher and Log Cleaner Count Metrics2.4.0 (WIP)
4849KIP-430 - Return Authorized Operations in Describe Responses2.3.0
4950KIP-429: Kafka Consumer Incremental Rebalance Protocol2.4.0 (WIP)
5051KIP-428: Add in-memory window store2.3.0
5152KIP-427: Add AtMinIsr topic partition category (new metric & TopicCommand option)2.3.0
5253KIP-425: Add some Log4J Kafka Appender Properties for Producing to Secured Brokers2.3.0
5354KIP-421: Support resolving externalized secrets in AbstractConfig2.3.0
5455KIP-420: Add Single Value Fetch in Session Stores2.2.0
5556KIP-417: Allow JmxTool to connect to a secured RMI port2.3.0
5657KIP-415: Incremental Cooperative Rebalancing in Kafka Connect2.3.0
5758KIP-414: Expose Embedded ClientIds in Kafka Streams2.2.0
5859KIP-412: Extend Admin API to support dynamic application log levels2.4.0 

KIP-411: Make default Kafka Connect worker task client IDs distinct

6061KIP-402: Improve fairness in SocketServer processors2.2.0 (partially implemented) / 2.3.0
6162KIP-401: TransformerSupplier/ProcessorSupplier StateStore connecting2.5.0 (WIP)
6263KIP-396: Add Commit/List Offsets Operations to AdminClient2.5.0 (WIP)
6364KIP-394: Require for initial join group request2.2.0
6465KIP-393: Time windowed serde to properly deserialize changelog input topic2.2.0
6566KIP-392: Allow consumers to fetch from closest replica2.4.0
6667KIP-389: Introduce a configurable consumer group size limit2.2.0
6768KIP-386: Standardize on Min/Avg/Max metrics' default value2.2.0
6869KIP-382: MirrorMaker

KIP-379: Multiple Consumer Group Management

7071KIP-380: Detect outdated control requests and bounced brokers using broker generation2.2.0
7172KIP-377: TopicCommand to use AdminClient2.2.0
7273KIP-376: Implement AutoClosable on appropriate classes that want to be used in a try-with-resource statement2.2.0
7374KIP-374: Add '--help' option to all available Kafka CLI commands2.2.0
7475KIP-372: Naming Repartition Topics for Joins and Grouping2.1.0
7576KIP-371: Add a configuration to build custom SSL principal name2.2.0
7677KIP-369: Alternative Partitioner to Support "Always Round-Robin" Selection2.4.0
7778KIP 368: Allow SASL Connections to Periodically Re-Authenticate2.2.0
7879KIP-367 Introduce close(Duration) to Producer and AdminClient instead of close(long, TimeUnit)2.2.0
7980KIP-366: Make FunctionConversions deprecated2.1.0
8081KIP-365: Materialized, Serialized, Joined, Consumed and Produced with implicit Serde2.1.0
8182KIP-361: Add Consumer Configuration to Disable Auto Topic Creation2.3.0
8283KIP-360: Improve handling of unknown producer2.4.0 (WIP)
8384KIP-359: Verify leader epoch in produce requests2.4.0 (WIP)
8485KIP-358: Migrate Streams API to Duration instead of long ms times2.1.0
8586KIP-357: Add support to list ACLs per principal2.1.0
8687KIP-356: Add withCachingDisabled() to StoreBuilder2.1.0
8788KIP-354: Add a Maximum Log Compaction Lag2.3.0
8889KIP-353: Improve Kafka Streams Timestamp Synchronization2.1.0
8990KIP-352: Distinguish URPs caused by reassignment2.5.0 
9091KIP-351: Add --under-min-isr option to describe topics command2.3.0
9192KIP-346: Improve LogCleaner behavior on error2.1
9293KIP-345: Introduce static membership protocol to reduce consumer rebalances2.4.0 (WIP), partially available in 2.3.0
9394KIP-342 Add support for custom SASL extensions in OAuthBearer authentication2.1.0
9495KIP-341: Update Sticky Assignor's User Data Protocol2.3.0
9596KIP-340: Allow and to take admin client property file2.1.0
9697KIP-339: Create a new IncrementalAlterConfigs API2.3.0 
9798KIP-338 Support to exclude the internal topics in command2.1.0
9899KIP-336: Consolidate ExtendedSerializer/Serializer and ExtendedDeserializer/Deserializer2.1.0
99100KIP-332: Update AclCommand to use AdminClient API2.1.0
100101KIP-331 Add default implementation to close() and configure() for Serializer, Deserializer and Serde2.3.0
101102KIP-330: Add retentionPeriod in SessionBytesStoreSupplier2.1.0
102103KIP-328: Ability to suppress updates for KTables2.1.0 (partially implemented) / 2.3.0 (WIP)
103104KIP-324: Add method to get metrics() in AdminClient2.1.0
104105KIP-322: Return new error code for DeleteTopics API when topic deletion disabled.2.1.0
105106KIP-321: Update TopologyDescription to better represent Source and Sink Nodes2.1.0
106107KIP-320: Allow fetchers to detect and handle log truncation2.1.0 (partially implemented) / 2.2.0
107108KIP-319: Replace segments with segmentInterval in WindowBytesStoreSupplier2.1.0
108109KIP-313: Add KStream.flatTransform and KStream.flatTransformValues 

2.2.0 (partially implemented)

/ 2.3.0

109110KIP-312 Add Overloaded StreamsBuilder Build Method to Accept java.util.Properties2.1.0
110111KIP-309: Add toUpperCase support to rule2.4.0
111112KIP-308: Support dynamic update of max.connections.per.ip/max.connections.per.ip.overrides2.1.0
112113KIP-307: Allow to define custom processor names with KStreams DSL2.3.0 (partial)
113114KIP-306: Configuration for Delaying Response to Failed Authentication2.1.0
114115KIP-305: Add Connect primitive number converters2.0.0
115116KIP-303: Add Dynamic Routing in Streams Sink2.0.0
116117KIP-302 - Enable Kafka clients to use all DNS resolved IP addresses2.1.0
117118KIP-300: Add Windowed KTable API in StreamsBuilder3.0.0 (WIP)
118119KIP-298: Error Handling in Connect2.0.0
119120KIP-297: Externalizing Secrets for Connect Configurations2.0.0
120121KIP-295 Add Streams Configuration Allowing for Optional Topology Optimization2.0.0
121122KIP-294 - Enable TLS hostname verification by default2.0.0

KIP-291: Separating controller connections and requests from the data plane

123124KIP-292: Add transformValues() method to KTable2.0.0
124125KIP-290: Support for Prefixed ACLs2.0.0
125126KIP-289: Improve the default group id behavior in KafkaConsumer2.2.0
126127KIP-285: Connect Rest Extension Plugin2.0.0
127128KIP-284: Set default retention ms for Streams repartition topics to Long.MAX_VALUE2.0.0
128129KIP-283: Efficient Memory Usage for Down-Conversion2.0.0
129130KIP-282: Add the listener name to the authentication context2.0.0
130131KIP-281: ConsumerPerformance: Increase Polling Loop Timeout and Make It Reachable by the End User2.0.0
131132KIP-279: Fix log divergence between leader and follower after fast leader fail over2.0.0
132133KIP-278 - Add version option to Kafka's commands2.0.0
133134KIP-277 - Fine Grained ACL for CreateTopics API2.0.0
134135KIP-276 - Add StreamsConfig prefix for different consumers2.0.0
135136KIP-274: Kafka Streams Skipped Records Metrics2.0.0
136137KIP-272: Add API version tag to broker's RequestsPerSec metric2.0.0
137138KIP-270 - A Scala Wrapper Library for Kafka Streams2.0.0
138139KIP-268: Simplify Kafka Streams Rebalance Metadata Upgrade2.0.0
139140KIP-267: Add Processor Unit Test Support to Kafka Streams Test Utils2.0.0
140141KIP-266: Fix consumer indefinite blocking behavior2.0.0
141142KIP-265: Make Windowed Serde to public APIs2.0.0
142143KIP-261: Add Single Value Fetch in Window Stores2.0.0
143144KIP-258: Allow to Store Record Timestamps in RocksDB2.3.0 (partially implemented)
144145KIP-257 - Configurable Quota Management2.0.0
145146KIP-255: OAuth Authentication via SASL/OAUTHBEARER2.0.0
146147KIP-251: Allow timestamp manipulation in Processor API2.0.0
147148KIP-249: Add Delegation Token Operations to KafkaAdminClient2.0.0
148149KIP-247: Add public test utils for Kafka Streams1.1.0
149150KIP-245: Use Properties instead of StreamsConfig in KafkaStreams constructor2.0.0
150151KIP-244: Add Record Header support to Kafka Streams Processor API2.0.0
151152KIP-243: Make ProducerConfig and ConsumerConfig constructors public1.1.0
152153KIP-239 Add queryableStoreName() to GlobalKTable1.1.0
153154KIP-238: Expose Kafka cluster ID in Connect REST API1.1.0
154155KIP-237: More Controller Health Metrics2.0.0
155156KIP-235: Add DNS alias support for secured connection2.1.0
156157KIP-233: Simplify StreamsBuilder#addGlobalStore1.1.0
157158KIP-231: Improve the Required ACL of ListGroups API2.1.0
158159KIP-229: DeleteGroups API1.1.0
159160KIP-227 - Introduce Incremental FetchRequests to Increase Partition Scalability1.1.0
160161KIP-226 - Dynamic Broker Configuration1.1.0
161162KIP-225 - Use tags for consumer “records.lag” metrics1.1.0
162163KIP-224: Add configuration parameter `retries` to Streams API1.1.0
163164KIP-223 - Add per-topic min lead and per-partition lead metrics to KafkaConsumer2.0.0
164165KIP-222 - Add Consumer Group operations to Admin API2.0.0
165166KIP-221: Enhance DSL with Connecting Topic Creation and Repartition Hint2.4.0 (WIP)
166167KIP-220: Add AdminClient into Kafka Streams' ClientSupplier1.1.0
167168KIP-219 - Improve quota communication2.0.0
168169KIP-218: Make KafkaFuture.Function java 8 lambda compatible1.1.0
169170KIP-215: Add topic regex support for Connect sinks1.1.0
170171KIP-214: Add config to the broker1.1.0
171172KIP-213 Support non-key joining in KTable2.4.0 (WIP)
172173KIP-212: Enforce set of legal characters for connector names1.1.0
173174KIP-211: Revise Expiration Semantics of Consumer Group Offsets2.1.0
174175KIP-210 - Provide for custom error handling when Kafka Streams fails to produce1.1.0
175176KIP-208: Add SSL support to Kafka Connect REST interface1.1.0
176177KIP-207: Offsets returned by ListOffsetsResponse should be monotonically increasing even during a partition leader change2.2.0
177178KIP-206: Add support for UUID serialization and deserialization2.1.0
178179KIP-205: Add all() and range() API to ReadOnlyWindowStore1.1.0
179180KIP-204 : Adding records deletion operation to the new Admin Client API1.1.0
180181KIP-203: Add toLowerCase support to rule 1.1.0
181182KIP-202: Move merge() from StreamsBuilder to KStream1.0.0
182183KIP-198: Remove ZK dependency from Streams Reset Tool1.0.0
183184KIP-197 Connect REST API should include the connector type when describing a connector1.0.0
184185KIP-196: Add metrics to Kafka Connect framework1.0.0
185186KIP-195: AdminClient.createPartitions1.0.0
186187KIP-192 : Provide cleaner semantics when idempotence is enabled1.0.0
187188KIP-191: KafkaConsumer.subscribe() overload that takes just Pattern1.0.0
188189KIP-190: Handle client-ids consistently between clients and brokers1.0.0
189190KIP-189: Improve principal builder interface and add support for SASL1.0.0
190191KIP-188 - Add new metrics to support health checks1.0.0
191192KIP-187 - Add cumulative count metric for all Kafka rate metrics1.0.0
192193KIP-186: Increase offsets retention default to 7 days2.0.0
193194KIP-183 - Change PreferredReplicaLeaderElectionCommand to use AdminClient2.2.0
194195KIP-182: Reduce Streams DSL overloads and allow easier use of custom storage engines1.0.0
195196KIP-180: Add a broker metric specifying the number of consumer group rebalances in progress1.1.0
196197KIP-177: Consumer perf tool should count rebalance time1.0.0
197198KIP-176: Remove deprecated new-consumer option for tools2.0.0
198199KIP-175: Additional '--describe' views for ConsumerGroupCommand1.1.0
199200KIP-174 - Deprecate and remove internal converter configs in WorkerConfig2.0.0
200201KIP-173: Add prefix to StreamsConfig to enable setting default internal topic configs1.0.0
201202KIP-171 - Extend Consumer Group Reset Offset for Stream Application1.1.0
202203KIP-168: Add GlobalTopicCount and GlobalPartitionCount metric per cluster1.0.0
203204KIP-167: Add interface for the state store restoration process1.0.0

KIP-164 - Add UnderMinIsrPartitionCount and per-partition UnderMinIsr metrics


KIP-163: Lower the Minimum Required ACL Permission of OffsetFetch

206207KIP-162: Enable topic deletion by default1.0.0
207208KIP-161: streams deserialization exception handlers1.0.0
208209KIP-160: Augment KStream.print(), KStream.writeAsText() to allow users pass in extra parameters in the printed string1.0.0
209210KIP-157 - Add consumer config options to streams reset tool1.0.0
210211KIP-156 Add option "dry run" to Streams application reset tool0.11.0.0
211212KIP-155 - Add range scan for windowed state stores0.11.0.0
212213KIP-154 Add Kafka Connect configuration properties for creating internal topics0.11.0.0
213214KIP-153: Include only client traffic in BytesOutPerSec metric0.11.0.0
214215KIP-152 - Improve diagnostics for SASL authentication failures1.0.0
215216KIP-151 Expose Connector type in REST API0.11.0.0
216217KIP-150 - Kafka-Streams Cogroup2.5.0 (WIP)
217218KIP-149: Enabling key access in ValueTransformer, ValueMapper, and ValueJoiner1.1.0 (partially implemented)
(WIP for 2.4.0)
218219KIP-146 - Classloading Isolation in Connect

219220KIP-145 - Expose Record Headers in Kafka Connect1.1.0
220221KIP-144: Exponential backoff for broker reconnect attempts0.11.0.0
221222KIP-143: Controller Health Metrics0.11.0.0
222223KIP-140: Add administrative RPCs for adding, deleting, and listing ACLs0.11.0.0
223224KIP-138: Change punctuate semantics1.0.0
224225KIP-137: Enhance TopicCommand --describe to show topics marked for deletion0.11.0.0
225226KIP-136: Add Listener name to SelectorMetrics tags0.11.0.0
226227KIP-134: Delay initial consumer group rebalance0.11.0.0
227228KIP-133: Describe and Alter Configs Admin APIs0.11.0.0
228229KIP-130: Expose states of active tasks to KafkaStreams public API1.0.0
229230KIP-129: Streams Exactly-Once Semantics0.11.0.0
230231KIP-128: Add ByteArrayConverter for Kafka Connect0.11.0.0
231232KIP-126 - Allow KafkaProducer to split and resend oversized batches.
232233KIP-124 - Request rate quotas0.11.0.0
233234KIP-123: Allow per stream/table timestamp extractor0.11.0.0
234235KIP-122: Add Reset Consumer Group Offsets tooling0.11.0.0
235236KIP-121: Add KStream peek method

236237KIP-120: Cleanup Kafka Streams builder API1.0.0
237238KIP-119: Drop Support for Scala 2.10 in Kafka
238239KIP-118: Drop Support for Java 72.0.0
239240KIP-117: Add a public AdminClient API for Kafka admin operations0.11.0.0
240241KIP-115: Enforce offsets.topic.replication.factor upon __consumer_offsets auto topic creation0.11.0.0
241242KIP-114: KTable state stores and improved semantics0.11.0.0
242243KIP-113: Support replicas movement between log directories1.1.0
243244KIP-112: Handle disk failure for JBOD1.0.0
244245KIP-110: Add Codec for ZStandard Compression2.1.0
245246KIP-109: Old Consumer Deprecation0.11.0.0
246247KIP-108: Create Topic Policy0.10.2.0
247248KIP-107: Add deleteRecordsBefore() API in AdminClient0.11.0.0

KIP-106 - Change Default unclean.leader.election.enabled from True to False
249250KIP-105: Addition of Record Level for Sensors0.10.2.0
250251KIP-104: Granular Sensors for Streams
251252KIP-103: Separation of Internal and External traffic0.10.2.0
252253KIP-102 - Add close with timeout for consumers0.10.2.0
253254KIP-101 - Alter Replication Protocol to use Leader Epoch rather than High Watermark for Truncation0.11.0.0
254255KIP-100 - Relax Type constraints in Kafka Streams API0.10.2.0
255256KIP-99: Add Global Tables to Kafka Streams0.10.2.0
256257KIP-98 - Exactly Once Delivery and Transactional Messaging0.11.0.0
257258KIP-97: Improved Kafka Client RPC Compatibility Policy0.10.2.0
258259KIP-96 - Add per partition metrics for in-sync and assigned replica count0.10.2.0
259260KIP-94 Session Windows0.10.2.0
260261KIP-93: Improve invalid timestamp handling in Kafka Streams0.10.2.0
261262KIP-92 - Add per partition lag metrics to KafkaConsumer0.10.2.0
262263KIP-91 Provide Intuitive User Timeouts in The Producer2.1.0
263264KIP-90 - Remove zkClient dependency from Streams0.10.2.0
264265KIP-89: Allow sink connectors to decouple flush and offset commit0.10.2.0
265266KIP-88: OffsetFetch Protocol Update0.10.2.0
266267KIP-86: Configurable SASL callback handlers2.0.0
267268KIP-85: Dynamic JAAS configuration for Kafka clients0.10.2.0
268269KIP-84: Support SASL SCRAM mechanisms0.10.2.0
269270KIP-82 - Add Record Headers0.11.0.0
270271KIP-81: Bound Fetch memory usage in the consumer2.5.0 (WIP)
271272KIP-79 - ListOffsetRequest/ListOffsetResponse v1 and add timestamp search methods to the new consumer0.10.1.0
272273KIP-78: Cluster Id0.10.1.0
273274KIP-77: Improve Kafka Streams Join Semantics0.10.2.0
274275KIP-75 - Add per-connector Converters0.10.1.0
275276KIP-74: Add Fetch Response Size Limit in Bytes0.10.1.0
276277KIP-73: Replication Quotas0.10.1.0
277278KIP-72: Allow putting a bound on memory consumed by Incoming request 1.0.0
278279KIP-71: Enable log compaction and deletion to co-exist0.10.1.0
279280KIP-70: Revise Partition Assignment Semantics on New Consumer's Subscription Change0.10.1.0
280281KIP-67: Queryable state for Kafka Streams0.10.1.0
281282KIP-66: Single Message Transforms for Kafka Connect0.10.2.0 /
282283KIP-65: Expose timestamps to Connect0.10.1.0
283284KIP-63: Unify store and downstream caching in streams0.10.1.0
284285KIP-62: Allow consumer to send heartbeats from a background thread0.10.1.0
285286KIP-60 - Make Java client classloading more flexible0.10.1.0
286287KIP-58 - Make Log Compaction Point Configurable0.10.1.0
287288KIP-57 - Interoperable LZ4 Framing0.10.0.0
288289KIP-56: Allow cross origin HTTP requests on all HTTP methods0.10.0.0
289290KIP-55: Secure Quotas for Authenticated Users0.10.1.0
290291KIP-54: Sticky Partition Assignment Strategy0.11.0.0
291292KIP-52: Connector Control APIs0.10.0.0
292293KIP-51 - List Connectors REST API0.10.0.0
293294KIP-48 Delegation token support for Kafka1.1.0
294295KIP-45 - Standardize all client sequence interaction on j.u.Collection.
295296KIP-43: Kafka SASL enhancements0.10.0.0
296297KIP-42: Add Producer and Consumer Interceptors0.10.0.0
297298KIP-41: Consumer Max Records0.10.0.0
298299KIP-40: ListGroups and DescribeGroup0.9.0.0
299300KIP-38: ZooKeeper Authentication0.9.0.0
300301KIP-36 - Rack aware replica assignment0.10.0.0
301302KIP-35 - Retrieving protocol version0.10.0.0
302303KIP-33 - Add a time based log index0.10.1.0
303304KIP-32 - Add timestamps to Kafka message0.10.0.0
304305KIP-31 - Move to relative offsets in compressed message sets0.10.0.0
305306KIP-28 - Add a processor client0.10.0.0
306307KIP-26 - Add Kafka Connect framework for data import/export0.9.0.0
307308KIP-25 - System test improvements0.9.0.0
308309KIP-22 - Expose a Partitioner interface in the new producer0.9.0.0
309310KIP-21 - Dynamic Configuration0.9.0.0 (WIP)
310311KIP-20 Enable log preallocate to improve consume performance under windows and some old Linux file system0.9.0.0
311312KIP-19 - Add a request timeout to NetworkClient0.9.0.0
312313KIP-16 - Automated Replica Lag Tuning0.9.0.0
313314KIP-15 - Add a close method with a timeout in the producer0.9.0.0
314315KIP-13 - Quota Design0.9.0.0
315316KIP-12 - Kafka Sasl/Kerberos and SSL implementation0.9.0.0
316317KIP-11 - Kafka Authorizer design0.9.0.0
317318KIP-8 - Add a flush method to the producer API0.9.0.0
318319KIP-4 - Metadata Protocol Changes0.10.0.0
319320KIP-4 - Command line and centralized administrative operations0.9.0.0,,
320321KIP-3 - Mirror Maker Enhancement0.9.0.0
321322KIP-2 - Refactor brokers to allow listening on multiple ports and IPs0.9.0.0
322323KIP-1 - Remove support of request.required.acks0.9.0.0


KIP-59: Proposal for a kafka broker commandSent emails to Dev discussion group. Work tracked under KAFKA-3663.
KIP-125: ZookeeperConsumerConnector to KafkaConsumer Migration and Rollback
KIP-131 - Add access to OffsetStorageReader from SourceConnector
KIP-135 : Send of null key to a compacted topic should throw non-retriable error back to user
KIP 141 - ProducerRecord & SourceRecord: Add timestamp constructors
KIP-142: Add ListTopicsRequest to efficiently list all the topics in a cluster
KIP-148: Add a connect timeout for client
KIP-158: Kafka Connect should allow source connectors to set topic-specific settings for new topics
KIP-159: Introducing Rich functions to Streams
KIP-166 - Add a tool to make amounts of replicas and leaders on brokers balanced
KIP-169 - Lag-Aware Partition Assignment Strategy
KIP-178: Size-based log directory selection strategy

KIP-185: Make exactly once in order delivery the default producer setting

KIP-193: Add SchemaBuilder.from(Schema)
KIP-199: Add Kafka Connect offset tool
KIP-201: Rationalising Policy interfaces
KIP-209: Connection String Support
KIP-216: IQ should throw different exceptions for different errors
KIP-217: Expose a timeout to allow an expired ZK session to be re-created
KIP-228 Negative record timestamp supportVoting in progress
KIP-234: add support for getting topic defaults from AdminClient
KIP-236: Interruptible Partition Reassignment Discussion
KIP-240: AdminClient.listReassignments() AdminClient.describeReassignments()
KIP-242: Mask password in Kafka Connect Rest API response
KIP-250 Add Support for Quorum-based Producer Acknowledgment
KIP-252 - Extend ACLs to allow filtering based on ip ranges and subnets
KIP-253: Support in-order message delivery with partition expansion Discussion
KIP-254: JsonConverter Exception Handeling
KIP-259: Improve Streams DSL Timestamp Propagation Semantics
KIP-260: add primary join operation for Stream-Stream join (WIP)Draft
KIP-264: Add a consumer metric to record raw fetch sizeVoting in progress
KIP-271: Add NetworkClient redirectorDiscussion
KIP-273: Kafka to support using ETCD beside ZookeeperDiscussion
KIP-275 - Indicate "isClosing" in the SinkTaskContextVoting in progress
KIP-280: Enhanced log compactionDiscussion
KIP-293 Add new metrics for consumer/replication fetch requestsVoting in progress
KIP-296: Add connector level configurability for producer/consumer client configs Discussion
KIP-301: Schema Inferencing for JsonConverterDiscussion
KIP-304: Connect runtime mode improvements for container platformsDiscussion
KIP-314: KTable to GlobalKTable Bi-directional JoinDiscussion
KIP-315: Stream Join Sticky AssignorDiscussion
KIP-316: Command-line overrides for ConnectDistributed worker propertiesDiscussion
KIP-317: Add end-to-end data encryption functionality to Apache KafkaDiscussion
KIP-325: Extend Consumer Group Command to Show Beginning OffsetsVoting in Progress345
KIP-326: Schedulable KTable as Graph sourceDiscussion
KIP-333: Add faster mode of rebalancingDiscussion
KIP-334 - Include partitions in exceptions raised during consumer record deserialization/validation
KIP-335: Consider configurations for KafkaStreams


KIP-347: Enable batching in FindCoordinatorRequestDiscussion
KIP-348 Eliminate null from SourceTask#poll()
KIP-350: Allow to take brokerid as parameter to show partitions associated with it
KIP-356: Add KafkaConsumer fetch-error-rate and fetch-error-total metricsDiscussion
KIP-360: Improve handling of unknown producerDiscussion
KIP-362: Support Dynamic Session WindowDiscussion
KIP-363: Allow performance tools to print final results to output fileDiscussion
KIP-370: Remove Orphan PartitionsDiscussion
KIP-373: Allow users to create delegation tokens for other usersDiscussion
KIP-375: Kafka Clients - make Metadata#TOPIC_EXPIRY_MS configurableDiscussion
KIP-378: Enable Dependency Injection for Kafka Streams handlersDiscussion
KIP-381: Connect: Tell about records that had their offsets flushed in callback

Voting in progress (restarted 18th January 2019, due to no votes in first attempt)

KIP-383:  Pluggable interface for SSL FactoryVoting in progress
KIP-384: Add config for incompatible changes to persistent metadataDiscussion
KIP-385: Avoid throwing away prefetched dataDiscussion
KIP-387: Fair Message Consumption Across Partitions in KafkaConsumer


KIP-388: Add observer interface to record request and responseDiscussion
KIP-390: Allow fine-grained configuration for compressionDiscussion, JIRA exists with pull-request
KIP-392: Allow consumers to fetch from closest replicaDiscussion
KIP-395: Encypt-then-MAC Delegation token metadata
KIP-397: Add methods to override fetch offsets based on timestampDiscussion
KIP-399: Extend ProductionExceptionHandler to cover serialization exceptionsDiscussion
KIP-400: Improve exit status in case of errors in ConsoleProducerDiscussion
KIP-403: Increase ProducerPerformance precision by using nanoTimeDraft
KIP-405: Kafka Tiered Storage


KIP-406: GlobalStreamThread should honor custom offset policy.Discussion
KIP-407: Kafka Connect support override worker kafka api configuration with connector configuration that post by rest api
KIP-408: Add asynchronous processing to Kafka StreamsDiscussion

KIP-409: Allow creating under-replicated topics and partitions

KIP-410: Add metric for request handler thread pool utilization by request type

KIP-416: Notify SourceTask of ACK'd offsets, metadataDiscussion
KIP-418: A method-chaining way to branch KStreamDiscussion, JIRA exists with pull-request
KIP-419: Safely notify Kafka Connect SourceTask is stoppedVoting in progress, JIRA exists with pull request
KIP-422: Add support for client quota configuration in the Kafka Admin ClientDiscussion, JIRA exists with pull-request
KIP-423: Add JoinReason to Consumer Join Group Protocol


KIP-424: Allow suppression of intermediate events based on wall clock timeDiscussion
KIP-426: Persist Broker Id to ZookeeperDiscussion
KIP-431: Support of printing additional ConsumerRecord fields in DefaultMessageFormatterVoting in progress, JIRA exists with pull-request
KIP-435: Internal Partition Reassignment BatchingDiscussion
KIP-437: Custom replacement for MaskField SMTVoting in progress, JIRA exists with pull-request
KIP-438: Expose task, connector IDs in Connect APIDiscussion
KIP-439: Cleanup built-in Store interfacesDiscussion
KIP-441: Smooth Scaling Out for Kafka StreamsDiscussion
KIP-447: Producer scalability for exactly once semanticsDiscussion
KIP-448: Add State Stores Unit Test Support to Kafka Streams Test UtilsDiscussion
KIP-450: Sliding Window Aggregations in the DSLDiscussion
KIP-452: Tool to view cluster statusDiscussion, JIRA exists
KIP-457: Add DISCONNECTED status to Kafka StreamsDiscussion 
KIP-459: Improve KafkaStreams#closeDiscussion
KIP-463: Auto-configure non-default Serdes passed alongside the TopologyBuilderUnder discussion
KIP-466: Add support for List<T> serialization and deserializationVoting in progress
KIP-468: Avoid decompression of record when validate record at server in the scene of inPlaceAssignment .Under discussion
KIP-473: Enable KafkaLog4JAppender to use SASL Authentication Callback HandlersUnder Discussion 
KIP-477: Add PATCH method for connector config in Connect REST APIUnder Discussion
KIP-478 - Strongly typed Processor APIUnder Discussion
KIP-486: Support custom way to load KeyStore and TrustStoreUnder Discussion
KIP-487: Automatic Topic Creation on ProducerUnder Discussion
KIP-489: Kafka Consumer Record Latency MetricUnder Discussion
KIP-490: New metric to count offsets expired without being consumed by a consumer groupUnder discussion
KIP-491: Preferred Leader Deprioritized List (Temporary Blacklist)Under discussion
KIP-494: Connect REST Endpoint to get Transformations (SMTs)
KIP-498: Add client-side configuration for maximum response size to protect against OOMSent emails to Dev discussion group. Work tracked under KAFKA-4090.

KIP-499 - Unify connection name flag for command line tool

Under discussion
KIP-499: Create a controller RPC for changing configurations
KIP-502: Connect SinkTask.put(...) to specify ArrayList<SinkRecord> in Signature
KIP-505: Add new public method to only update assignment metadata in consumerUnder discussion
KIP-506: Allow setting SCRAM password via Admin interfaceUnder discussion
KIP-508: Make Suppression State QueriableUnder discussion
KIP-509: Rebalance and restart ProducersUnder discussion
KIP-510: Metrics library upgradeUnder discussion
KIP-512: Adding headers to RecordMetaDataSent mail to dev discussion group
KIP-513: Distinguish between Key and Value serdes in scala wrapper library for kafka streams

KIP-514:Add a bounded flush() API to Kafka Producer

 (KIP-515 should go here)
KIP-516: Topic Identifiers & Topic Deletion State ImprovementsUnder discussion
KIP-518: Allow listing consumer groups per stateUnder discussion
KIP-519: Make SSL context/engine configuration extensibleUnder discussion

KIP-522: Update BrokerApiVersionsCommand to use AdminClient

KIP-523: Add KStream#toTable to the Streams DSLUnder discussion
KIP-526: Reduce Producer Metadata Lookups for Large Number of TopicsUnder discussion
KIP-527: Add VoidSerde to SerdesVote completed. KIP passed
KIP-530: Consider renaming 'UsePreviousTimeOnInvalidTimeStamp' class to 'UsePartitionTimeOnInvalidTimeStamp'Under discussion
KIP-533: Add default api timeout to AdminClient

Under Discussion

KIP-534: Reorganize checkpoint system in log cleaner to per partition Under discussion (renumbered from KIP-515)KIP-535: Allow state stores to serve stale reads during rebalanceUnder Discussion
KIP-536: Propagate broker timestamp to Admin APIUnder discussion
KIP-537: Increase default zookeeper session timeoutUnder discussion
KIP-538: Add a metric tracking the number of open connections with a given SSL cipher type

Under discussion

KIP-539: Add mechanism to flush records out in low volume suppression buffersUnder discussion.