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templateId 54329345
title KIP-NEXT: Insert Title Here
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. Take the next available KIP number and give your proposal a descriptive heading. e.g. "KIP 42: Allow Infinite Retention With Bounded Disk Usage".
Fill in the sections as described above
Start a [DISCUSS] thread on the Apache mailing list. Please ensure that the subject of the thread is of the format [DISCUSS] KIP-{your KIP number} {your KIP heading} The and the body contains a link to your new KIP. The discussion should happen on the mailing list, not on the wiki, since the wiki comment system doesn't work well for larger discussions. In the process of the discussion you may update the proposal. You should let people know the changes you are making. When you feel you have a finalized proposal
Once the proposal is finalized call a [VOTE] to have the proposal adopted. These proposals are more serious than code changes and more serious even than release votes. The criteria for acceptance is lazy majority. The vote should remain open for at least 72 hours.
Please update the KIP wiki page, and the index below, to reflect the current stage of the KIP after a vote. This acts as the permanent record indicating the result of the KIP (e.g., Accepted or Rejected). Also report the result of the KIP vote to the voting thread on the mailing list so the conclusion is clear.

KIP round-up

Next KIP Number: 471529

Use this number as the identifier for your KIP and increment this value.

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Please insert new rows in sorted order (descending by KIP number).

464: Defaults for AdminClient#createTopic460: Admin Leader Election RPC3442: Return to default max poll interval in Streams3436 a metric indicating start time3427: Add AtMinIsr topic partition category (new metric & TopicCommand option3430 - Return Authorized Operations in Describe Responses3428: Add in-memory window store3414: Expose Embedded ClientIds in Kafka Streams2386: Standardize on Min/Avg/Max metrics' default value2371: Add a configuration to build custom SSL principal name2 368: Allow SASL Connections to Periodically Re-Authenticate2365: Materialized, Serialized, Joined, Consumed and Produced with implicit Serde1358: Migrate Streams API to Duration instead of long ms times1356: Add withCachingDisabled() to StoreBuilder1351: Add --under-min-isr option to describe topics command3346: Improve LogCleaner behavior on error1336: Consolidate ExtendedSerializer/Serializer and ExtendedDeserializer/Deserializer1332: Update AclCommand to use AdminClient API1330: Add retentionPeriod in SessionBytesStoreSupplier1322: Return new error code for DeleteTopics API when topic deletion disabled.1319: Replace segments with segmentInterval in WindowBytesStoreSupplier162-313: Add KStream.flatTransform and KStream.flatTransformValues 63312 Add Overloaded StreamsBuilder Build Method to Accept java.util.Properties64308: Support dynamic update of max.connections.per.ip/max.connections.per.ip.overrides6667305: Add Connect primitive number converters06869302 - Enable Kafka clients to use all DNS resolved IP addresses71737475762.080279: Fix log divergence between leader and follower after fast leader fail over00274: Kafka Streams Skipped Records Metrics0268: Simplify Kafka Streams Rebalance Metadata Upgrade0265: Make Windowed Serde to public APIs2.0261: Add Single Value Fetch in Window Stores02.096249: Add Delegation Token Operations to KafkaAdminClient0247: Add public test utils for Kafka Streams1-243: Make ProducerConfig and ConsumerConfig constructors public1239 Add queryableStoreName() to GlobalKTable1.1238: Expose Kafka cluster ID REST API1237: More Controller Health Metrics-233: Simplify StreamsBuilder#addGlobalStore1.1231: Improve the Required ACL of ListGroups API2.1.0229: DeleteGroups API1.1227 - Introduce Incremental FetchRequests to Increase Partition Scalability1.1226 - Dynamic Broker Configuration1.1224: Add configuration parameter `retries` to Streams API1.1223 - Add per-topic min lead and per-partition lead metrics to KafkaConsumer222 - Add Consumer Group operations to Admin API220: Add AdminClient into Kafka Streams' ClientSupplier1.1218: Make KafkaFuture.Function java 8 lambda compatible1.1-215: Add topic regex support for Connect sinks1.1213 Support non-key joining in KTable3 (WIP)212: Enforce set of legal characters for connector names1.1-211: Revise Expiration Semantics of Consumer Group Offsets1207: Offsets returned by ListOffsetsResponse should be monotonically increasing even during a partition leader change2206: Add support for UUID serialization and deserialization1204 : Adding records deletion operation to the new Admin Client API1.1.0202: Move merge() from StreamsBuilder to KStream1192 : Provide cleaner semantics when idempotence is enabled1187 - Add cumulative count metric for all Kafka rate metrics1.0183 - Change PreferredReplicaLeaderElectionCommand to use AdminClient2176: Remove deprecated new-consumer option for tools2.0163: Lower the Minimum Required ACL Permission of OffsetFetch0161: streams deserialization exception handlers1.0.0130: Expose states of active tasks to KafkaStreams public API1123: Allow per stream/table timestamp extractor0.11114: KTable state stores and improved semantics0.11.110: Add Codec for ZStandard Compression2.1-109: Old Consumer Deprecation0.11.108: Create Topic Policy102107: Add deleteRecordsBefore() API in AdminClient89: Allow sink connectors to decouple flush and offset commit0.10.2.67 Queryable state for Kafka Streams0.10.

	KIP (please keep this sorted by KIP number)	Release
1	KIP-	2.3.0 (WIP)
2	KIP-465: Add Consolidated Connector Endpoint to Connect REST API	2.3.0
500: Replace ZooKeeper with a Self-Managed Metadata Quorum
2	KIP-482: The Kafka Protocol should Support Optional Tagged Fields	2.4.0 (WIP)
3	KIP-504 - Add new Java Authorizer Interface	2.4.0 (WIP)	3	KIP-462: Use local thread id for KStreams	2.3.0
4	KIP-	503: Add metric for number of topics marked for deletion	2.	4.0 (WIP)
5	KIP-454: Expansion of the ConnectClusterState interface497: Add inter-broker API to alter ISR	2.34.0 (WIP)
6	KIP-453: Add close() method to RocksDBConfigSetter496: Administrative API to delete consumer offsets	2.34.0 (WIP)
7	KIP-449: Add connector contexts to log messages 495: Dynamically Adjust Log Levels in Connect workers	2.34.0 (WIP)
8	KIP-446: Add changelog topic configuration to KTable suppress488: Clean up Sum,Count,Total Metrics	2.34.0 (WIP)
9	KIP-445: In-memory Session Store484: Expose metrics for group and transaction metadata loading duration	2.34.0 (WIP)
10	KIP-443: Return to default segment.ms and segment.index.bytes in Streams repartition topics	2.3.0	481: SerDe Improvements for Connect Decimal type in JSON	2.4.0 (WIP)
11	KIP-	480: Sticky Partitioner	2.	4.0
12	KIP-	479: Add	Materialized to Join	2.	4.0(WIP)
13	KIP-417: Allow JmxTool to connect to a secured RMI port476: Add Java AdminClient Interface	2.34.0
14	KIP-415: Incremental Cooperative Rebalancing in Kafka Connect475: New Metrics to Measure Number of Tasks on a Connector	2.34.0 (WIP)
15	KIP-	474: To deprecate WindowStore#put(key, value)	2.	4.0 (WIP)
16	KIP-	471: Expose RocksDB Metrics in Kafka Streams	2.	4.0 (WIP)
17	KIP-	467: Augment ProduceResponse error messaging for specific culprit records	2.	4.0 (WIP)
18	KIP-425465: Add some Log4J Kafka Appender Properties for Producing to Secured BrokersConsolidated Connector Endpoint to Connect REST API	2.3.0
19	KIP-420: Add Single Value Fetch in Session Stores464: Defaults for AdminClient#createTopic	2.24.0
20	KIP-421: Support resolving externalized secrets in AbstractConfig 462: Use local thread id for KStreams	2.3.0
21	KIP-412: Extend Admin API to support dynamic application log levels461: Improve Replica Fetcher behavior at handling partition failure	2.3.0 (WIP)
22	KIP-	460: Admin Leader Election RPC	2.	4.0
23	KIP-411: Make default Kafka Connect worker task client IDs distinct458: Connector Client Config Override Policy	2.3.0
24	KIP-402: Improve fairness in SocketServer processors455: Create an Administrative API for Replica Reassignment	2.24.0 (WIP)
25	KIP-394: Require member.id for initial join group request454: Expansion of the ConnectClusterState interface	2.23.0
26	KIP-393: Time windowed serde to properly deserialize changelog input topic453: Add close() method to RocksDBConfigSetter	2.23.0
27	KIP-	449: Add connector contexts to log messages in Connect workers	2.	3.0
28	KIP-446: Add changelog topic configuration to KTable suppress	382: MirrorMaker 2.4.0 (WIP)
29	KIP-445: In-memory Session Store	2.3.0
2930	KIP- 380: Detect outdated control requests and bounced brokers using broker generation	2.2.0	30	KIP-377: TopicCommand to use AdminClient	443: Return to default segment.ms and segment.index.bytes in Streams repartition topics	2.32.2.0
31	KIP-376: Implement AutoClosable on appropriate classes that want to be used in a try-with-resource statement442: Return to default max poll interval in Streams	2.23.0
32	KIP-374: Add '--help' option to all available Kafka CLI commands440: Extend Connect Converter to support headers	2.24.0 (WIP)
33	KIP-372: Naming Repartition Topics for Joins and Grouping436: Add a metric indicating start time	2.13.0
34	KIP-	434: Add Replica Fetcher and Log Cleaner Count Metrics	2.	4.0 (WIP)
35	KIP	-430 - Return Authorized Operations in Describe Responses	2.	3.0
36	KIP-367 Introduce close(Duration) to Producer and AdminClient instead of close(long, TimeUnit)429: Kafka Consumer Incremental Rebalance Protocol	2.24.0 (WIP)
37	KIP-366: Make FunctionConversions deprecated428: Add in-memory window store	2.13.0
38	KIP-	427: Add AtMinIsr topic partition category (new metric & TopicCommand option)	2.	3.0
39	KIPKIP-361425: Add Consumer Configuration to Disable Auto Topic Creationsome Log4J Kafka Appender Properties for Producing to Secured Brokers	2.3.0
40	KIP-359: Verify leader epoch in produce requests421: Support resolving externalized secrets in AbstractConfig	2.3.0 (WIP)
41	KIP-	420: Add Single Value Fetch in Session Stores	2.	2.0
42	KIP-357: Add support to list ACLs per principal417: Allow JmxTool to connect to a secured RMI port	2.13.0
43	KIP-	415: Incremental Cooperative Rebalancing in Kafka Connect	2.	3.0
44	KIP-353: Improve 414: Expose Embedded ClientIds in Kafka Streams Timestamp Synchronization	2.12.0
45	KIP-	412: Extend Admin API to support dynamic application log levels	2.	4.0 (WIP)
46	KIP-	411: Make default Kafka Connect worker task client IDs distinct	2.	3.0
47	KIP-342 Add support for custom SASL extensions in OAuthBearer authentication402: Improve fairness in SocketServer processors	2.2.0 (partially implemented) / 2.32.1.0
48	KIP-341: Update Sticky Assignor's User Data Protocol401: TransformerSupplier/ProcessorSupplier StateStore connecting	2.34.0 (WIP)
49	KIP-340: Allow kafka-reassign-partitions.sh and kafka-log-dirs.sh to take admin client property file396: Add Commit/List Offsets Operations to AdminClient	2.14.0 (WIP)
50	KIP-339: Create a new IncrementalAlterConfigs API394: Require member.id for initial join group request	2.32.0 0
51	KIP-338 Support to exclude the internal topics in kafka-topics.sh command393: Time windowed serde to properly deserialize changelog input topic	2.12.0
52	KIP-	389: Introduce a configurable consumer group size limit	2.	2.0
53	KIP-	386: Standardize on Min/Avg/Max metrics' default value	2.	2.0
54	KIP-331 Add default implementation to close() and configure() for Serializer, Deserializer and Serde382: MirrorMaker 2.0	2.34.0 (WIP)
55	KIP-	379: Multiple Consumer Group Management	2.	4.0 (WIP)
56	KIP-328: Ability to suppress updates for KTables380: Detect outdated control requests and bounced brokers using broker generation	2.1.0 (partially implemented) / 2.3.0 (WIP)
57	KIP-324377: Add method to get metrics() in TopicCommand to use AdminClient	2.12.0
58	KIP-	376: Implement AutoClosable on appropriate classes that want to be used in a try-with-resource statement	2.	2.0
59	KIP-321: Update TopologyDescription to better represent Source and Sink Nodes374: Add '--help' option to all available Kafka CLI commands	2.12.0
60	KIP-320: Allow fetchers to detect and handle log truncation372: Naming Repartition Topics for Joins and Grouping	2.1.0 (partially implemented) /
61	KIP-371: Add a configuration to build custom SSL principal name	2.2.0
6162	KIP-	369: Alternative Partitioner to Support "Always Round-Robin" Selection	2.	4.0
63	KIP	368: Allow SASL Connections to Periodically Re-Authenticate	2.2.0
64	KIP-367 Introduce close(Duration) to Producer and AdminClient instead of close(long, TimeUnit)	2.2 (partially implemented)/ 2.3.0
65	KIP-	366: Make FunctionConversions deprecated	2.1.0
66	KIP-	365: Materialized, Serialized, Joined, Consumed and Produced with implicit Serde	2.1.0
6567	KIPK IP-307361: Allow to define custom processor names with KStreams DSLAdd Consumer Configuration to Disable Auto Topic Creation	2.3.0 (partial)
68	KIP-306: Configuration for Delaying Response to Failed Authentication360: Improve handling of unknown producer	2.14.0 (WIP)
69	KIP-	359: Verify leader epoch in produce requests	2.	4.0 (WIP)
70	KIP-303: Add Dynamic Routing in Streams Sink358: Migrate Streams API to Duration instead of long ms times	2.01.0
71	KIP-	357: Add support to list ACLs per principal	2.1.0
7072	KIP-298: Error Handling in Connect356: Add withCachingDisabled() to StoreBuilder	2.01.0
73	KIP-297: Externalizing Secrets for Connect Configurations354: Add a Maximum Log Compaction Lag	2.03.0
7274	KIP-295 Add Streams Configuration Allowing for Optional Topology Optimization353: Improve Kafka Streams Timestamp Synchronization	2.01.0
75	KIP-294 - Enable TLS hostname verification by default352: Distinguish URPs caused by reassignment	2.04.0 (WIP)
76	KIP-292351: Add transformValues() method to KTable--under-min-isr option to describe topics command	2.03.0
77	KIP-290: Support for Prefixed ACLs346: Improve LogCleaner behavior on error	2.0.01
78	KIP-289: Improve the default group id behavior in KafkaConsumer345: Introduce static membership protocol to reduce consumer rebalances	2.2.0	77	KIP-285: Connect Rest Extension Plugin	4.0 (WIP), partially available in 2.3.0
7879	KIP-284: Set default retention ms for Streams repartition topics to Long.MAX_VALUE342 Add support for custom SASL extensions in OAuthBearer authentication	2.01.0
7980	KIP-283: Efficient Memory Usage for Down-Conversion341: Update Sticky Assignor's User Data Protocol	2.03.0
81	KIP-282: Add the listener name to the authentication context	2.0.0	81	KIP-281: ConsumerPerformance: Increase Polling Loop Timeout and Make It Reachable by the End User	340: Allow kafka-reassign-partitions.sh and kafka-log-dirs.sh to take admin client property file	2.12.0.0
82	KIP-	339: Create a new IncrementalAlterConfigs API	2.	3.	0
83	KIP-278 - Add version option to Kafka's commands338 Support to exclude the internal topics in kafka-topics.sh command	2.01.0
84	KIP-277 - Fine Grained ACL for CreateTopics API336: Consolidate ExtendedSerializer/Serializer and ExtendedDeserializer/Deserializer	2.01.0
85	KIP-276 - Add StreamsConfig prefix for different consumers332: Update AclCommand to use AdminClient API	2.01.0
86	KIP-	331 Add default implementation to close() and configure() for Serializer, Deserializer and Serde	2.	3.0
87	KIP-272330: Add API version tag to broker's RequestsPerSec metricretentionPeriod in SessionBytesStoreSupplier	2.01.0
88	KIP-270 - A Scala Wrapper Library for Kafka Streams328: Ability to suppress updates for KTables	2.1.0 (partially implemented) / 2.3.0 (WIP)2.0.0
89	KIP-	324: Add method to get metrics() in AdminClient	2.	1.0
90	KIP-267: Add Processor Unit Test Support to Kafka Streams Test Utils322: Return new error code for DeleteTopics API when topic deletion disabled.	2.01.0
91	KIP-266: Fix consumer indefinite blocking behavior321: Update TopologyDescription to better represent Source and Sink Nodes	2.01.0
92	KIP-	320: Allow fetchers to detect and handle log truncation	2.1.0 (partially implemented) / 2.2	.0
93	KIP-	319: Replace segments with segmentInterval in WindowBytesStoreSupplier	2.	1.0
94	KIP-258: Allow to Store Record Timestamps in RocksDB313: Add KStream.flatTransform and KStream.flatTransformValues	2. 3 2.0	95	KIP-257 - Configurable Quota Management	(partially implemented) / 2.3	.0
95	KIP-255: OAuth Authentication via SASL/OAUTHBEARER312 Add Overloaded StreamsBuilder Build Method to Accept java.util.Properties	2.1.0
96	KIP-309: Add toUpperCase support to sasl.kerberos.principal.to.local rule	2.42.0.0
97	KIP-251: Allow timestamp manipulation in Processor API308: Support dynamic update of max.connections.per.ip/max.connections.per.ip.overrides	2.01.0
98	KIP-	307: Allow to define custom processor names with KStreams DSL	2.	3.0 (partial)
99	KIP-	306: Configuration for Delaying Response to Failed Authentication	2	.1.0
100	KIP-245: Use Properties instead of StreamsConfig in KafkaStreams constructor305: Add Connect primitive number converters	2.0.0
101	KIP-244303: Add Record Header support to Kafka Streams Processor APIDynamic Routing in Streams Sink	2.0.0
102	KIP	-302 - Enable Kafka clients to use all DNS resolved IP addresses	2	.1.0
103	KIP-	300: Add Windowed KTable API in StreamsBuilder	2.4	.0
104	KIP-	298: Error Handling in Connect	1	2.	0.0
105	KIP-	297: Externalizing Secrets for Connect Configurations	2.0.0
106	KIP-235: Add DNS alias support for secured connection295 Add Streams Configuration Allowing for Optional Topology Optimization	2.10.0
107	KIP	-294 - Enable TLS hostname verification by default	2.0	.0
108	KIP-	291: Separating controller connections and requests from the data plane	Accepted
109	KIP-	292: Add transformValues() method to KTable	2.0	.0
110	KIP-	290: Support for Prefixed ACLs	2.0	.0
111	KIP-	289: Improve the default group id behavior in KafkaConsumer	2.2	.0
112	KIP-225 - Use tags for consumer “records.lag” metrics285: Connect Rest Extension Plugin	2.01.1.0
113	KIP-	284: Set default retention ms for Streams repartition topics to Long.MAX_VALUE	2.0	.0
114	KIP-	283: Efficient Memory Usage for Down-Conversion	2.0.0
115	KIP-	282: Add the listener name to the authentication context	2.0.0
116	KIP-	281: ConsumerPerformance: Increase Polling Loop Timeout and Make It Reachable by the End User	2.0	.0
117	KIP-219 - Improve quota communication279: Fix log divergence between leader and follower after fast leader fail over	2.0.0
118	KIP-	278 - Add version option to Kafka's commands	2.0	.0
119	KIP	-277 - Fine Grained ACL for CreateTopics API	2.0	.0
120	KIP-276 - 214: Add zookeeper.max.in.flight.requests config to Add StreamsConfig prefix for different consumers	2.0 the broker1.1.0
121	KIP-	274: Kafka Streams Skipped Records Metrics	2.	0.0
122	KIP-	272: Add API version tag to broker's RequestsPerSec metric	2.0	.0
123	KIP	-270 - A Scala Wrapper Library for Kafka Streams	2.	0.0
124	KIP-210 - Provide for custom error handling when Kafka Streams fails to produce268: Simplify Kafka Streams Rebalance Metadata Upgrade	2.01.1.0
125	KIP-208267: Add SSL support Processor Unit Test Support to Kafka Connect REST interfaceStreams Test Utils	2.01.1.0
126	KIP-	266: Fix consumer indefinite blocking behavior	2.	0.0
127	KIP-	265: Make Windowed Serde to public APIs	2.	0.0
128	KIP-205: Add all() and range() API to ReadOnlyWindowStore261: Add Single Value Fetch in Window Stores	2.01.1.0
129	KIP-	258: Allow to Store Record Timestamps in RocksDB	2.3.0 (partially implemented)
130	KIP-257 - Configurable Quota Management	2.0-203: Add toLowerCase support to sasl.kerberos.principal.to.local rule 1.1.0
131	KIP-	255: OAuth Authentication via SASL/OAUTHBEARER	2	.0.0
132	KIP-198: Remove ZK dependency from Streams Reset Tool251: Allow timestamp manipulation in Processor API	21.0.0
133	KIP-197 Connect REST API should include the connector type when describing a connector249: Add Delegation Token Operations to KafkaAdminClient	21.0.0
134	KIP-196247: Add metrics to Kafka Connect frameworkpublic test utils for Kafka Streams	1.01.0
135	KIP-195: AdminClient.createPartitions245: Use Properties instead of StreamsConfig in KafkaStreams constructor	2.1.0.0
136	KIP-	244: Add Record Header support to Kafka Streams Processor API	2	.0.0
137	KIP-191: KafkaConsumer.subscribe() overload that takes just Pattern243: Make ProducerConfig and ConsumerConfig constructors public	1.01.0
138	KIP-190: Handle client-ids consistently between clients and brokers239 Add queryableStoreName() to GlobalKTable	1.01.0
139	KIP-189: Improve principal builder interface and add support for SASL238: Expose Kafka cluster ID in Connect REST API	1.01.0
140	KIP-188 - Add new metrics to support health checks237: More Controller Health Metrics	21.0.0
141	KIP-	235: Add DNS alias support for secured connection	2.1	.0
142	KIP-186: Increase offsets retention default to 7 days233: Simplify StreamsBuilder#addGlobalStore	1.12.0.0
143	KIP-	231: Improve the Required ACL of ListGroups API	2.	1.0
144	KIP-182: Reduce Streams DSL overloads and allow easier use of custom storage engines229: DeleteGroups API	1.01.0
145	KIP-180: Add a broker metric specifying the number of consumer group rebalances in progress-227 - Introduce Incremental FetchRequests to Increase Partition Scalability	1.1.0
146	KIP-177: Consumer perf tool should count rebalance time-226 - Dynamic Broker Configuration	1.01.0
147	KIP-	225 - Use tags for consumer “records.lag” metrics	1.1	.0
148	KIP-175: Additional '--describe' views for ConsumerGroupCommand224: Add configuration parameter `retries` to Streams API	1.1.0
149	KIP-223 - 174 - Deprecate and remove internal converter configs in WorkerConfigAdd per-topic min lead and per-partition lead metrics to KafkaConsumer	2.0.0
150	KIP-173: Add prefix to StreamsConfig to enable setting default internal topic configs222 - Add Consumer Group operations to Admin API	21.0.0
151	KIP-171 - Extend Consumer Group Reset Offset for Stream Application221: Enhance DSL with Connecting Topic Creation and Repartition Hint	2.4.0 (WIP)1.1.0
152	KIP-168220: Add GlobalTopicCount and GlobalPartitionCount metric per clusterAdminClient into Kafka Streams' ClientSupplier	1.01.0
153	KIP-167: Add interface for the state store restoration process219 - Improve quota communication	21.0.0
154	KIP-164 - Add UnderMinIsrPartitionCount and per-partition UnderMinIsr metrics218: Make KafkaFuture.Function java 8 lambda compatible	1.01.0
155	KIP-	215: Add topic regex support for Connect sinks	1.	1.0
156	KIP-162: Enable topic deletion by default214: Add zookeeper.max.in.flight.requests config to the broker	1.01.0
157	KIP-	213 Support non-key joining in KTable	2.4.0 (WIP)
158	KIP-160: Augment KStream.print(), KStream.writeAsText() to allow users pass in extra parameters in the printed string	1.0.0
159	KIP-157 - Add consumer config options to streams reset tool	1.0.0
160	KIP-156 Add option "dry run" to Streams application reset tool	0.11.0.0
161	KIP-155 - Add range scan for windowed state stores	0.11.0.0
162	KIP-154 Add Kafka Connect configuration properties for creating internal topics	0.11.0.0
163	KIP-153: Include only client traffic in BytesOutPerSec metric	0.11.0.0
164	KIP-152 - Improve diagnostics for SASL authentication failures	1.0.0
165	KIP-151 Expose Connector type in REST API	0.11.0.0
166	KIP-150 - Kafka-Streams Cogroup	2.3.0 (WIP)
167	KIP-149: Enabling key access in ValueTransformer, ValueMapper, and ValueJoiner	1.1.0 (partially implemented) (WIP for 2.3.0)
212: Enforce set of legal characters for connector names	1.1.0
159	KIP-211: Revise Expiration Semantics of Consumer Group Offsets	2.1.0
160	KIP-210 - Provide for custom error handling when Kafka Streams fails to produce	1.1.0
161	KIP-208: Add SSL support to Kafka Connect REST interface	1.1.0
162	KIP-207: Offsets returned by ListOffsetsResponse should be monotonically increasing even during a partition leader change	2.2.0
163	KIP-206: Add support for UUID serialization and deserialization	2.1.0
164	KIP-205: Add all() and range() API to ReadOnlyWindowStore	1.1.0
165	KIP-204 : Adding records deletion operation to the new Admin Client API	1.1.0
166	KIP-203: Add toLowerCase support to sasl.kerberos.principal.to.local rule	1.1.0
167	KIP-202: Move merge() from StreamsBuilder to KStream	1.0.0
168	KIP-198: Remove ZK dependency from Streams Reset Tool	1	168	KIP-146 - Classloading Isolation in Connect	0.11.0.0
169	KIP-145 - Expose Record Headers in Kafka Connect197 Connect REST API should include the connector type when describing a connector	1.10.0
170	KIP-144: Exponential backoff for broker reconnect attempts196: Add metrics to Kafka Connect framework	1.0.11.0.0
171	KIP-143: Controller Health Metrics195: AdminClient.createPartitions	1.0.11.0.0
172	KIP-140: Add administrative RPCs for adding, deleting, and listing ACLs192 : Provide cleaner semantics when idempotence is enabled	10.11.0.0
173	KIP-138: Change punctuate semantics191: KafkaConsumer.subscribe() overload that takes just Pattern	1.0.0
174	KIP-137190: Enhance TopicCommand --describe to show topics marked for deletionHandle client-ids consistently between clients and brokers	10.11.0.0
175	KIP-136: Add Listener name to SelectorMetrics tags189: Improve principal builder interface and add support for SASL	10.11.0.0
176	KIP-134: Delay initial consumer group rebalance-188 - Add new metrics to support health checks	1.0.11.0.0
177	KIP-133: Describe and Alter Configs Admin APIs187 - Add cumulative count metric for all Kafka rate metrics	1.0.11.0.0
178	KIP-	186: Increase offsets retention default to 7 days	2	.0.0
179	KIP-129: Streams Exactly-Once Semantics183 - Change PreferredReplicaLeaderElectionCommand to use AdminClient	2.2.00.11.0.0
180	KIP-128: Add ByteArrayConverter for Kafka Connect182: Reduce Streams DSL overloads and allow easier use of custom storage engines	1.0.11.0.0
181	KIP-126 - Allow KafkaProducer to split and resend oversized batches.180: Add a broker metric specifying the number of consumer group rebalances in progress	1.1.00.11.0.0
182	KIP-124 - Request rate quotas177: Consumer perf tool should count rebalance time	1.0.0.11.0.0
183	KIP-	176: Remove deprecated new-consumer option for tools	2	.0.0
184	KIP-122: Add Reset Consumer Group Offsets tooling175: Additional '--describe' views for ConsumerGroupCommand	1.10.11.0.0
185	KIP-121: Add KStream peek method174 - Deprecate and remove internal converter configs in WorkerConfig	2.0.11.0.0
186	KIP-120: Cleanup Kafka Streams builder API173: Add prefix to StreamsConfig to enable setting default internal topic configs	1.0.0
187	KIP-171 - Extend Consumer Group Reset Offset for Stream Application	1.1.0-119: Drop Support for Scala 2.10 in Kafka 0.110.11.0.0
188	KIP-118: Drop Support for Java 7168: Add GlobalTopicCount and GlobalPartitionCount metric per cluster	12.0.0
189	KIP-117167: Add a public AdminClient API for Kafka admin operationsinterface for the state store restoration process	10.11.0.0
190	KIP-164 - Add UnderMinIsrPartitionCount and per-partition UnderMinIsr metrics	1-115: Enforce offsets.topic.replication.factor upon __consumer_offsets auto topic creation0.11.0.0
191	KIP-	163: Lower the Minimum Required ACL Permission of OffsetFetch	1.	0.0
192	KIP-113: Support replicas movement between log directories162: Enable topic deletion by default	1.10.0
193	KIP-112: Handle disk failure for JBOD161: streams deserialization exception handlers	1.0.0
194	KIP-	160: Augment KStream.print(), KStream.writeAsText() to allow users pass in extra parameters in the printed string	1.0	.0
195	KIP	-157 - Add consumer config options to streams reset tool	1.	0.0
196	KIP-	156 Add option "dry run" to Streams application reset tool	0.	11.	0.0
197	KIP-	155 - Add range scan for windowed state stores	0.11.0.0
198	KIP-106 - Change Default unclean.leader.election.enabled from True to False154 Add Kafka Connect configuration properties for creating internal topics	0.11.0.0
199	KIP-105: Addition of Record Level for Sensors153: Include only client traffic in BytesOutPerSec metric	0.1011.20.0
200	KIP-104: Granular Sensors for Streams 152 - Improve diagnostics for SASL authentication failures	1.00.10.2.0
201	KIP-103: Separation of Internal and External traffic151 Expose Connector type in REST API	0.1011.20.0
202	KIP-150 - 102 - Add close with timeout for consumersKafka-Streams Cogroup	2.4.0 (WIP)0.10.2.0
203	KIP-101 - Alter Replication Protocol to use Leader Epoch rather than High Watermark for Truncation	0.11.0.0	149: Enabling key access in ValueTransformer, ValueMapper, and ValueJoiner	1.1.0 (partially implemented) (WIP for 2.4.0)
204	KIP-146 - Classloading Isolation in Connect	0.11.0	204	KIP-100 - Relax Type constraints in Kafka Streams API	0.10.2 .0
205	KIP-99: Add Global Tables to Kafka Streams-145 - Expose Record Headers in Kafka Connect	1.1.0.10.2.0
206	KIP-98 - Exactly Once Delivery and Transactional Messaging144: Exponential backoff for broker reconnect attempts	0.11.0.0
207	KIP-97: Improved Kafka Client RPC Compatibility Policy143: Controller Health Metrics	0.1011.20.0
208	KIP-96 - Add per partition metrics for in-sync and assigned replica count140: Add administrative RPCs for adding, deleting, and listing ACLs	0.1011.20.0
209	KIP-94 Session Windows138: Change punctuate semantics	1.00.10.2.0
210	KIP-93: Improve invalid timestamp handling in Kafka Streams137: Enhance TopicCommand --describe to show topics marked for deletion	0.1011.20.0
211	KIP-92 - Add per partition lag metrics to KafkaConsumer136: Add Listener name to SelectorMetrics tags	0.1011.20.0
212	KIP-91 Provide Intuitive User Timeouts in The Producer134: Delay initial consumer group rebalance	0.11.02.1.0
213	KIP-90 - Remove zkClient dependency from Streams133: Describe and Alter Configs Admin APIs	0.1011.20.0
214	KIP-	130: Expose states of active tasks to KafkaStreams public API	1.0.	0
215	KIP-88: OffsetFetch Protocol Update129: Streams Exactly-Once Semantics	0.1011.20.0
216	KIP-86: Configurable SASL callback handlers128: Add ByteArrayConverter for Kafka Connect	0.112.0.0
217	KIP-85: Dynamic JAAS configuration for Kafka clients126 - Allow KafkaProducer to split and resend oversized batches.	0.1011.20.0
218	KIP-84: Support SASL SCRAM mechanisms-124 - Request rate quotas	0.1011.20.0
219	KIP-82 - Add Record Headers123: Allow per stream/table timestamp extractor	0.11.0.0
220	KIP-81: Bound Fetch memory usage in the consumer122: Add Reset Consumer Group Offsets tooling	0.11.0.02.2.0 (WIP)
221	KIP-79 - ListOffsetRequest/ListOffsetResponse v1 and add timestamp search methods to the new consumer121: Add KStream peek method	0. 10 11. 1 0.0
222	KIP-78: Cluster Id120: Cleanup Kafka Streams builder API	1.0.0.10.1.0
223	KIP-77: Improve Kafka Streams Join Semantics119: Drop Support for Scala 2.10 in Kafka 0.11	0.1011.20.0
224	KIP-75 - Add per-connector Converters118: Drop Support for Java 7	2.0.0.10.1.0
225	KIP-74117: Add Fetch Response Size Limit in Bytesa public AdminClient API for Kafka admin operations	0.1011.10.0
226	KIP-73: Replication Quotas115: Enforce offsets.topic.replication.factor upon __consumer_offsets auto topic creation	0.1011.10.0
227	KIP-72: Allow putting a bound on memory consumed by Incoming request 114: KTable state stores and improved semantics	0.111.0.0
228	KIP-71: Enable log compaction and deletion to co-exist113: Support replicas movement between log directories	10.10.1.0
229	KIP-70: Revise Partition Assignment Semantics on New Consumer's Subscription Change112: Handle disk failure for JBOD	1.00.10.1.0
230	KIP-	110:	Add Codec for ZStandard Compression	2.	1.0
231	KIP-66: Single Message Transforms for Kafka Connect109: Old Consumer Deprecation	00.10.2.0 / 0.11.0.0
232	KIP-65: Expose timestamps to Connect108: Create Topic Policy	0.10.12.0
233	KIP-63: Unify store and downstream caching in streams107: Add deleteRecordsBefore() API in AdminClient	0.1011.10.0
234	KIP- 62: Allow consumer to send heartbeats from a background thread 106 - Change Default unclean.leader.election.enabled from True to False	0.1011.10.0
235	KIP-60 - Make Java client classloading more flexible105: Addition of Record Level for Sensors	0.10.12.0
236	KIP-58 - Make Log Compaction Point Configurable104: Granular Sensors for Streams	0.10.12.0
237	KIP-57 - Interoperable LZ4 Framing103: Separation of Internal and External traffic	0.10.02.0
238	KIP-56: Allow cross origin HTTP requests on all HTTP methods102 - Add close with timeout for consumers	0.10.02.0
239	KIP-55: Secure Quotas for Authenticated Users-101 - Alter Replication Protocol to use Leader Epoch rather than High Watermark for Truncation	0.1011.10.0
240	KIP-54: Sticky Partition Assignment Strategy-100 - Relax Type constraints in Kafka Streams API	0.1110.02.0
241	KIP-52: Connector Control APIs99: Add Global Tables to Kafka Streams	0.10.02.0
242	KIP-51 - List Connectors REST API98 - Exactly Once Delivery and Transactional Messaging	0.1011.0.0
243	KIP-50 - Move Authorizer to o.a.k.common package97: Improved Kafka Client RPC Compatibility Policy	0.10.12.0
244	KIP-48 Delegation token support for Kafka-96 - Add per partition metrics for in-sync and assigned replica count	0.10.21.1.0
245	KIP-45 - Standardize all client sequence interaction on j.u.Collection.94 Session Windows	0.10.02.0
246	KIP-4393: Kafka SASL enhancementsImprove invalid timestamp handling in Kafka Streams	0.10.02.0
247	KIP-42: Add Producer and Consumer Interceptors92 - Add per partition lag metrics to KafkaConsumer	0.10.02.0
248	KIP-41: Consumer Max Records91 Provide Intuitive User Timeouts in The Producer	2.10.10.0.0
249	KIP-40: ListGroups and DescribeGroup90 - Remove zkClient dependency from Streams	0.910.02.0
250	KIP-38: ZooKeeper Authentication89: Allow sink connectors to decouple flush and offset commit	0.910.02.0
251	KIP-36 - Rack aware replica assignment88: OffsetFetch Protocol Update	0.10.02.0
252	KIP-35 - Retrieving protocol version86: Configurable SASL callback handlers	20.10.0.0
253	KIP-33 - Add a time based log index85: Dynamic JAAS configuration for Kafka clients	0.10.12.0
254	KIP-32 - Add timestamps to Kafka message84: Support SASL SCRAM mechanisms	0.10.02.0
255	KIP-31 - Move to relative offsets in compressed message sets82 - Add Record Headers	0.1011.0.0
256	KIP-28 - Add a processor client81: Bound Fetch memory usage in the consumer	2.4.0 (WIP)0.10.0.0
257	KIP-26 - Add Kafka Connect framework for data import/export79 - ListOffsetRequest/ListOffsetResponse v1 and add timestamp search methods to the new consumer	0.910.01.0
258	KIP-25 - System test improvements78: Cluster Id	0.910.01.0
259	KIP-22 - Expose a Partitioner interface in the new producer77: Improve Kafka Streams Join Semantics	0.910.02.0
260	KIP-75 - 21 - Dynamic ConfigurationAdd per-connector Converters	0.910.01.0 (WIP)
261	KIP-20 Enable log preallocate to improve consume performance under windows and some old Linux file system74: Add Fetch Response Size Limit in Bytes	0.910.01.0
262	KIP-19 - Add a request timeout to NetworkClient73: Replication Quotas	0.910.01.0
263	KIP-16 - Automated Replica Lag Tuning72: Allow putting a bound on memory consumed by Incoming request	10.9.0.0
264	KIP-15 - Add a close method with a timeout in the producer71: Enable log compaction and deletion to co-exist	0.910.01.0
265	KIP-13 - Quota Design70: Revise Partition Assignment Semantics on New Consumer's Subscription Change	0.910.01.0
266	KIP-12 - Kafka Sasl/Kerberos and SSL implementation67: Queryable state for Kafka Streams	0.910.01.0
267	KIP-11 - Kafka Authorizer design66: Single Message Transforms for Kafka Connect	0.10.2.0 / 0.110.9.0.0
268	KIP-8 - Add a flush method to the producer API65: Expose timestamps to Connect	0.910.01.0
269	KIP-4 - Metadata Protocol Changes63: Unify store and downstream caching in streams	0.10.01.0
270	KIP-4 - Command line and centralized administrative operations62: Allow consumer to send heartbeats from a background thread	0.910.01.0,
271	KIP-60 - Make Java client classloading more flexible	0.10.01.0,
272	KIP-58 - Make Log Compaction Point Configurable	0.10.1.0
271273	KIP-3 - Mirror Maker Enhancement57 - Interoperable LZ4 Framing	0.910.0.0
272274	KIP-2 - Refactor brokers to allow listening on multiple ports and IPs56: Allow cross origin HTTP requests on all HTTP methods	0.910.0.0
273275	KIP-55: Secure Quotas for Authenticated Users	0.10.1 - Remove support of request.required.acks.0
276	KIP-54: Sticky Partition Assignment Strategy	0.911.0.0

...

277	KIP-52: Connector Control APIs	0.10.0.0
278	KIP-51 - List Connectors REST API	0.10.0.0
279	KIP-48 Delegation token support for Kafka	1.1.0
280	KIP-45 - Standardize all client sequence interaction on j.u.Collection.	0.10.0.0
281	KIP-43: Kafka SASL enhancements	0.10.0.0
282	KIP-42: Add Producer and Consumer Interceptors	0.10.0.0
283	KIP-41: Consumer Max Records	0.10.0.0
284	KIP-40: ListGroups and DescribeGroup	0.9.0.0
285	KIP-38: ZooKeeper Authentication	0.9.0.0
286	KIP-36 - Rack aware replica assignment	0.10.0.0
287	KIP-35 - Retrieving protocol version	0.10.0.0
288	KIP-33 - Add a time based log index	0.10.1.0
289	KIP-32 - Add timestamps to Kafka message	0.10.0.0
290	KIP-31 - Move to relative offsets in compressed message sets	0.10.0.0
291	KIP-28 - Add a processor client	0.10.0.0
292	KIP-26 - Add Kafka Connect framework for data import/export	0.9.0.0
293	KIP-25 - System test improvements	0.9.0.0
294	KIP-22 - Expose a Partitioner interface in the new producer	0.9.0.0
295	KIP-21 - Dynamic Configuration	0.9.0.0 (WIP)
296	KIP-20 Enable log preallocate to improve consume performance under windows and some old Linux file system	0.9.0.0
297	KIP-19 - Add a request timeout to NetworkClient	0.9.0.0
298	KIP-16 - Automated Replica Lag Tuning	0.9.0.0
299	KIP-15 - Add a close method with a timeout in the producer	0.9.0.0
300	KIP-13 - Quota Design	0.9.0.0
301	KIP-12 - Kafka Sasl/Kerberos and SSL implementation	0.9.0.0
302	KIP-11 - Kafka Authorizer design	0.9.0.0
303	KIP-8 - Add a flush method to the producer API	0.9.0.0
304	KIP-4 - Metadata Protocol Changes	0.10.0.0
305	KIP-4 - Command line and centralized administrative operations	0.9.0.0, 0.10.0.0, 0.10.1.0
306	KIP-3 - Mirror Maker Enhancement	0.9.0.0
307	KIP-2 - Refactor brokers to allow listening on multiple ports and IPs	0.9.0.0
308	KIP-1 - Remove support of request.required.acks	0.9.0.0

KIPs under discussion

Please insert new rows in sorted order (ascending by KIP number). Please move the adopted/accepted KIPs to the "Adopted KIPs" table above.

KIP	Comment
KIP-59: Proposal for a kafka broker command	Sent 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: C onnection 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 support	Voting 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 size	Voting in progress
KIP-271: Add NetworkClient redirector	Discussion
KIP-273: Kafka to support using ETCD beside Zookeeper	Discussion
KIP-275 - Indicate "isClosing" in the SinkTaskContext	Voting in progress
KIP-280: Enhanced log compaction	Discussion
KIP-293 Add new metrics for consumer/replication fetch requests	Voting in progress
KIP-296: Add connector level configurability for producer/consumer client configs	Discussion
KIP-301: Schema Inferencing for JsonConverter	Discussion
KIP-304: Connect runtime mode improvements for container platforms	Discussion
KIP-314: KTable to GlobalKTable Bi-directional Join	Discussion
KIP-315: Stream Join Sticky Assignor	Discussion
KIP-316: Command-line overrides for ConnectDistributed worker properties	Discussion
KIP-317: Add end-to-end data encryption functionality to Apache Kafka	Discussion
KIP-325: Extend Consumer Group Command to Show Beginning Offsets	Voting in Progress345
KIP-326: Schedulable KTable as Graph source	Discussion
KIP-333: Add faster mode of rebalancing	Discussion
KIP-334 - Include partitions in exceptions raised during consumer record deserialization/validation
KIP-335: Consider configurations for KafkaStreams	Discussion
KIP-347: Enable batching in FindCoordinatorRequest	Discussion
KIP-348 Eliminate null from SourceTask#poll()
KIP-350: Allow kafka-topics.sh to take brokerid as parameter to show partitions associated with it
KIP-356: Add KafkaConsumer fetch-error-rate and fetch-error-total metrics	Discussion
KIP-360: Improve handling of unknown producer	Discussion
K IP-362: Support Dynamic Session Window	Discussion
KIP-363: Allow performance tools to print final results to output file	Discussion
KIP-370: Remove Orphan Partitions	Discussion
KIP-373: Allow users to create delegation tokens for other users	Discussion
KIP-375: Kafka Clients - make Metadata#TOPIC_EXPIRY_MS configurable	Discussion
KIP-378: Enable Dependency Injection for Kafka Streams handlers	Discussion
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 Factory	Voting in progress
KIP-384: Add config for incompatible changes to persistent metadata	Discussion
KIP-385: Avoid throwing away prefetched data	Discussion
KIP-387: Fair Message Consumption Across Partitions in KafkaConsumer	Discussion
KIP-388: Add observer interface to record request and response	Discussion
KIP-390: Allow fine-grained configuration for compression	Discussion, JIRA exists with pull-request
KIP-391: Allow Producing with Offsets for Cluster Replication	Discussion, JIRA exists with pull-request
KIP-392: Allow consumers to fetch from closest replica	Discussion
KIP-395: Encypt-then-MAC Delegation token metadata
KIP-397: Add methods to override fetch offsets based on timestamp	Discussion
KIP-398: Support reading trust store from classpath	Discussion
KIP-399: Extend ProductionExceptionHandler to cover serialization exceptions	Discussion
KIP-400: Improve exit status in case of errors in ConsoleProducer	Discussion
KIP-403: Increase ProducerPerformance precision by using nanoTime	Draft
KIP-405: Kafka Tiered Storage	Discussion
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 Streams	Discussion
KIP-409: Allow creating under-replicated topics and partitions
KIP-410: Add metric for request handler thread pool utilization by request type	Discussion
KIP-416: Notify SourceTask of ACK'd offsets, metadata	Discussion
KIP-418: A method-chaining way to branch KStream	Discussion, JIRA exists with pull-request
KIP-419: Safely notify Kafka Connect SourceTask is stopped	Voting in progress, JIRA exists with pull request
KIP-422: Add support for client quota configuration in the Kafka Admin Client	Discussion, JIRA exists with pull-request
KIP-423: Add JoinReason to Consumer Join Group Protocol	Discussion
KIP-424: Allow suppression of intermediate events based on wall clock time	Discussion
KIP-426: Persist Broker Id to Zookeeper	Discussion
KIP-431: Support of printing additional ConsumerRecord fields in DefaultMessageFormatter	Voting in progress, JIRA exists with pull-request
KIP-435: Internal Partition Reassignment Batching	Discussion
KIP-437: Custom replacement for MaskField SMT	Voting in progress, JIRA exists with pull-request
KIP-438: Expose task, connector IDs in Connect API	Discussion
KIP-439: Cleanup built-in Store interfaces	Discussion
KIP-441: Smooth Scaling Out for Kafka Streams	Discussion
KIP-444: Augment metrics for Kafka Streams	Discussion
KIP-447: Producer scalability for exactly once semantics	Discussion
KIP-448: Add State Stores Unit Test Support to Kafka Streams Test Utils	Discussion
KIP-450: Sliding Window Aggregations in the DSL	Discussion
KIP-452: Tool to view cluster status	Discussion, JIRA exists
KIP-457: Add DISCONNECTED status to Kafka Streams	Discussion
KIP-459: Improve KafkaStreams#close	Discussion
KIP-463: Auto-configure non-default Serdes passed alongside the TopologyBuilder	Under discussion
KIP-466: Add support for List<T> serialization and deserialization	Voting in progress
KIP-468: Avoid decompression of record when validate record at server in the scene of inPlaceAssignment .	Under discussion
KIP-470: TopologyTestDriver test input and output usability improvements	Voting in progress
KIP-473: Enable KafkaLog4JAppender to use SASL Authentication Callback Handlers	Under Discussion
KIP-477: Add PATCH method for connector config in Connect REST API	Under Discussion
KIP-478 - Strongly typed Processor API	Under Discussion
KIP-486: Support custom way to load KeyStore and TrustStore	Under Discussion
KIP-487: Automatic Topic Creation on Producer	Under Discussion
KIP-489: Kafka Consumer Record Latency Metric	Under Discussion
KIP-490: New metric to count offsets expired without being consumed by a consumer group	Under 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 OOM	Sent 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 consumer	Under discussion
KIP-506: Allow setting SCRAM password via Admin interface	Under discussion
KIP-507: Securing Internal Connect REST Endpoints	Voting in progress, draft available
KIP-508: Make Suppression State Queriable	Under discussion
KIP-509: Rebalance and restart Producers	Under discussion
KIP-510: Metrics library upgrade	Under discussion
KIP-511: Collect and Expose Client's Name and Version in the Brokers
KIP-512: Adding headers to RecordMetaData	Sent 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: Reorganize checkpoint system in log cleaner to per partition
KIP-516: Topic Identifiers & Topic Deletion State Improvements	Under discussion
KIP-517: Add consumer metrics to observe user poll behavior	Under discussion
KIP-518: Allow listing consumer groups per state	Under discussion
KIP-519: Make SSL context/engine configuration extensible	Under discussion
KIP-521: Enable redirection of Connect's log4j messages to a file by default	Under discussion
KIP-522: Update BrokerApiVersionsCommand to use AdminClient	Draft
KIP-523: Add KStream#toTable to the Streams DSL	Under discussion
KIP-525 - Return topic metadata and configs in CreateTopics response	Under discussion
KIP-526: Reduce Producer Metadata Lookups for Large Number of Topics	Under discussion
KIP-527: Add NullSerde to Serdes	Under discussion
KIP-528: Deprecate PartitionGrouper configuration and interface	Under discussion

Please insert new rows in sorted order (by KIP number).

KIP	Comment
KIP-59: Proposal for a kafka broker command	Sent 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: C onnection 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-221: Enhance KStream with Connecting Topic Creation and Repartition Hint	Discussion
KIP-228 Negative record timestamp support	Voting 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 size	Voting in progress
KIP-271: Add NetworkClient redirector	Discussion
KIP-273: Kafka to support using ETCD beside Zookeeper	Discussion
KIP-275 - Indicate "isClosing" in the SinkTaskContext	Voting in progress
KIP-280: Enhanced log compaction	Discussion
KIP-291: Separating controller connections and requests from the data plane	Accepted
KIP-293 Add new metrics for consumer/replication fetch requests	Voting in progress
KIP-296: Add connector level configurability for producer/consumer client configs	Discussion
KIP-300: Add Windowed KTable API in StreamsBuilder	Discussion
KIP-301: Schema Inferencing for JsonConverter	Discussion
KIP-304: Connect runtime mode improvements for container platforms	Discussion
KIP-314: KTable to GlobalKTable Bi-directional Join	Discussion
KIP-315: Stream Join Sticky Assignor	Discussion
KIP-316: Command-line overrides for ConnectDistributed worker properties	Discussion
KIP-317: Add transparent data encryption functionality	Discussion
KIP-325: Extend Consumer Group Command to Show Beginning Offsets	Voting in Progress
KIP-326: Schedulable KTable as Graph source	Discussion
KIP-333: Add faster mode of rebalancing	Discussion
KIP-334 - Include partitions in exceptions raised during consumer record deserialization/validation
KIP-335: Consider configurations for KafkaStreams	Discussion
KIP-345: Introduce static membership protocol to reduce consumer rebalances	Accepted
KIP-347: Enable batching in FindCoordinatorRequest	Discussion
KIP-348 Eliminate null from SourceTask#poll()	KIP-350: Allow kafka-topics.sh to take brokerid as parameter to show partitions associated with it
KIP-354: Add a Maximum Log Compaction Lag	Accepted
KIP-356: Add KafkaConsumer fetch-error-rate and fetch-error-total metrics	Discussion
KIP-360: Improve handling of unknown producer	Discussion
K IP-362: Support Dynamic Session Window	Discussion
KIP-363: Allow performance tools to print final results to output file	Discussion
KIP-369: Alternative Partitioner to Support "Always Round-Robin" Selection	Discussion
KIP-370: Remove Orphan Partitions	Discussion
KIP-373: Allow users to create delegation tokens for other users	Discussion
KIP-375: Kafka Clients - make Metadata#TOPIC_EXPIRY_MS configurable	Discussion
KIP-378: Enable Dependency Injection for Kafka Streams handlers	Discussion
KIP-379: Multiple Consumer Group Management	Accepted
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 Factory	Voting in progress
KIP-384: Add config for incompatible changes to persistent metadata	Discussion
KIP-385: Avoid throwing away prefetched data	Discussion
KIP-387: Fair Message Consumption Across Partitions in KafkaConsumer	Discussion
KIP-388: Add observer interface to record request and response	Discussion
KIP-389: Introduce a configurable consumer group size limit	Accepted
KIP-390: Allow fine-grained configuration for compression	Discussion, JIRA exists with pull-request
KIP-391: Allow Producing with Offsets for Cluster Replication	Discussion, JIRA exists with pull-request
KIP-392: Allow consumers to fetch from closest replica	Discussion
KIP-395: Encypt-then-MAC Delegation token metadata
KIP-396: Add Commit/List Offsets Operations to AdminClient	Discussion
KIP-397: Add methods to override fetch offsets based on timestamp	Discussion
KIP-398: Support reading trust store from classpath	Discussion
KIP-399: Extend ProductionExceptionHandler to cover serialization exceptions	Discussion
KIP-400: Improve exit status in case of errors in ConsoleProducer	Discussion
KIP-401: TransformerSupplier/ProcessorSupplier StateStore connecting	Voting in progress
KIP-403: Increase ProducerPerformance precision by using nanoTime	Draft
KIP-405: Kafka Tiered Storage	Discussion
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 Streams	Discussion
KIP-409: Allow creating under-replicated topics and partitions
KIP-410: Add metric for request handler thread pool utilization by request type	Discussion
KIP-416: Notify SourceTask of ACK'd offsets, metadata	Discussion
KIP-418: A method-chaining way to branch KStream	Discussion, JIRA exists with pull-request
KIP-419: Safely notify Kafka Connect SourceTask is stopped	Voting in progress, JIRA exists with pull request
KIP-421: Support resolving externalized secrets in AbstractConfig	Accepted
KIP-422: Add support for client quota configuration in the Kafka Admin Client	Discussion, JIRA exists with pull-request
KIP-423: Add JoinReason to Consumer Join Group Protocol	Discussion
KIP-424: Allow suppression of intermediate events based on wall clock time	Discussion
KIP-426: Persist Broker Id to Zookeeper	Discussion
KIP-429: Kafka Consumer Incremental Rebalance Protocol	Discussion
KIP-431: Support of printing additional ConsumerRecord fields in DefaultMessageFormatter	Voting in progress, JIRA exists with pull-request
KIP-434: Add Replica Fetcher and Log Cleaner Count Metrics	Discussion
KIP-435: Incremental Partition Reassignment	Discussion
KIP-437: Custom replacement for MaskField SMT	Voting in progress, JIRA exists with pull-request
KIP-438: Expose task, connector IDs in Connect API	Discussion
KIP-439: Deprecate Interface WindowStoreIterator	Discussion
KIP-440: Extend Connect Converter to support headers	Voting in progress
KIP-444: Augment metrics for Kafka Streams	Discussion
KIP-448: Add State Stores Unit Test Support to Kafka Streams Test Utils	Discussion
KIP-450: Sliding Window Aggregations in the DSL	Discussion
KIP-452: Tool to view cluster status	Discussion, JIRA exists
KIP-455: Create an Administrative API for Replica Reassignment	Discussion
KIP-456: Helper classes to make it simpler to write test logic with TopologyTestDriver	Discussion
KIP-457: Add DISCONNECTED status to Kafka Streams	Discussion
KIP-458: Connector Client Config Override Policy	Accepted
KIP-459: Improve KafkaStreams#close	Discussion
KIP-461: Improve Replica Fetcher behavior at handling partition failure	Discussion
KIP-463: Auto-configure non-default Serdes passed alongside the TopologyBuilder	Under discussion
KIP-468: Avoid decompression of record when validate record at server in the scene of inPlaceAssignment .	Under discussion
KIP-470: TopologyTestDriver test input and output usability improvements

Dormant/inactive KIPs

Please insert new rows in sorted order (ascending by KIP number).

KIP	Comment
KIP-6 - New reassignment partition logic for rebalancing	Needs more detail
KIP-10 - Running Producer, Consumers and Brokers on Mesos
KIP-14 - Tools standardization
KIP-17 - Add HighwaterMarkOffset to OffsetFetchResponse
KIP-23 - Add JSON/CSV output and looping options to ConsumerGroupCommand
KIP-27 - Conditional Publish
KIP-30 - Allow for brokers to have plug-able consensus and meta data storage sub systems
KIP-37 - Add Namespaces to Kafka
KIP-39: Pinning controller to broker
KIP-44 - Allow Kafka to have a customized security protocol
KIP-46 - Self Healing
KIP-47 - Add timestamp-based log deletion policy
KIP-49 - Fair Partition Assignment Strategy
KIP-53 - Add custom policies for reconnect attempts to NetworkdClient
KIP-59: Proposal for a kafka broker command
KIP-64 -Allow underlying distributed filesystem to take over replication depending on configuration
KIP-68 Add a consumed log retention before log retention
KIP-69 - Kafka Schema Registry	Draft
KIP-76 Enable getting password from executable rather than passing as plaintext in config files
KIP-87 - Add Compaction Tombstone Flag	Possibly displaced by KIP-82
KIP-95: Incremental Batch Processing for Kafka Streams
KIP-269: Substitution Within Configuration Values
KIP-349: Priorities for Source Topics	Functionality can be realized with existing API although at a lower level.
KIP-399: Extend ProductionExceptionHandler to cover serialization exceptions