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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: 468527

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

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465: Add Consolidated Connector Endpoint to Connect REST API2.3.0 (WIP)462: Use local thread id for KStreams3460: Admin Leader Election RPC3449: Add connector contexts to log messages in Connect workers 3446: Add changelog topic configuration to KTable suppress3436: Add a metric indicating start time3 (WIP)417 Allow JmxTool to connect to a secured RMI port3415: Incremental Cooperative Rebalancing in Kafka Connect3 (WIP)427: Add AtMinIsr topic partition category (new metric & TopicCommand option)3430 - Return Authorized Operations in Describe Responses3402: Improve fairness in SocketServer processors2 (WIP)394: Require member.id for initial join group request2380: Detect outdated control requests and bounced brokers using broker generation2371: Add a configuration to build custom SSL principal name2 368: Allow SASL Connections to Periodically Re-Authenticate2-366: Make FunctionConversions deprecated1KIP361 Consumer Configuration to Disable Auto Topic Creation359: Verify leader epoch in produce requests (WIP)357: Add support to list ACLs per principal1356 withCachingDisabled() to StoreBuilder1353: Improve Kafka Streams Timestamp Synchronization1351: Add --under-min-isr option to describe topics command342 Add support for custom SASL extensions in OAuthBearer authentication1341: Update Sticky Assignor's User Data Protocol (WIP)332: Update AclCommand to use AdminClient API1331 Add default implementation to close() and configure() for Serializer, Deserializer and Serde3 (WIP)324: Add method to get metrics() in AdminClient1322: Return new error code for DeleteTopics API when topic deletion disabled.1312 Add Overloaded StreamsBuilder Build Method to Accept java.util.Properties1-306: Configuration for Delaying Response to Failed Authentication1305: Add Connect primitive number converters2.0303: Add Dynamic Routing in Streams Sink0292 transformValues() method to KTable0285: Connect Rest Extension Plugin0279: Fix log divergence between leader and follower after fast leader fail over0276 - Add StreamsConfig prefix for different consumers00-274: Kafka Streams Skipped Records Metrics0270 - A Scala Wrapper Library for Kafka Streams0268: Simplify Kafka Streams Rebalance Metadata Upgrade0267 Processor Unit Test Support to Kafka Streams Test Utils0265: Make Windowed Serde to public APIs0257 - Configurable Quota Management2.0251: Allow timestamp manipulation in Processor API2.0.249: Add Delegation Token Operations to KafkaAdminClient0245: Use Properties instead of StreamsConfig in KafkaStreams constructor0239 Add queryableStoreName() to GlobalKTable1.1238: Expose Kafka cluster ID in Connect REST API1237: More Controller Health Metrics0233: Simplify StreamsBuilder#addGlobalStore1.1-229: DeleteGroups API1.1KIP-223 - Add per-topic min lead and per-partition lead metrics to KafkaConsumer222 - Add Consumer Group operations to Admin API220 AdminClient into Kafka Streams' ClientSupplier218: Make KafkaFuture.Function java 8 lambda compatible1.1214: Add zookeeper.max.in.flight.requests config to the broker1.1210 - Provide for custom error handling when Kafka Streams fails to produce1.1208: Add SSL support to Kafka Connect REST interface1.1206: Add support for UUID serialization and deserialization1205: Add all() and range() API to ReadOnlyWindowStore1.1202: Move merge() from StreamsBuilder to KStream1.0.0197 Connect REST API should include the connector type when describing a connector1190: Handle client-ids consistently between clients and brokers1183 - Change PreferredReplicaLeaderElectionCommand to use AdminClient2180: Add a broker metric specifying the number of consumer group rebalances in progress1176: Remove deprecated new-consumer option for tools2.0-163: Lower the Minimum Required ACL Permission of OffsetFetch1156 Add option "dry run" to Streams application reset tool0.11.0155 - Add range scan for windowed state stores0.11.0.0151 Expose Connector type in REST API0.11.0.0-130: Expose states of active tasks to KafkaStreams public API121: Add KStream peek method0.11112: Handle disk failure for JBOD110: Add Codec for ZStandard Compression2.1107: Add deleteRecordsBefore() API in AdminClient0.11.106 - Change Default unclean.leader.election.enabled from True to False105: Addition of Record Level for Sensors10286: Configurable SASL callback handlers265: Expose timestamps to Connect0.10

	KIP (please keep this sorted by KIP number)	Release
1	KIP-	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)
4	KIP-454: Expansion of the ConnectClusterState interface503: Add metric for number of topics marked for deletion	2.34.0 (WIP)
5	KIP-453497: Add close() method to RocksDBConfigSetterinter-broker API to alter ISR	2.34.0 (WIP)
6	KIP-	496: Administrative API to delete consumer offsets	2.	4.0 (WIP)
7	KIP-	495: Dynamically Adjust Log Levels in Connect	2.	4.0 (WIP)
8	KIP-445: In-memory Session Store488: Clean up Sum,Count,Total Metrics	2.34.0
9	KIP-443: Return to default segment.ms and segment.index.bytes in Streams repartition topics484: Expose metrics for group and transaction metadata loading duration	2.34.0 (WIP)
10	KIP-442: Return to default max poll interval in Streams481: SerDe Improvements for Connect Decimal type in JSON	2.34.0 (WIP)
11	KIP-	480: Sticky Partitioner	2.	4.0
12	KIP-	479:	Add Materialized to Join	2.	4.0(WIP)
13	KIP-	476: Add Java AdminClient Interface	2.	4.0
14	KIP-	475: New Metrics to Measure Number of Tasks on a Connector	2.	4.0 (WIP)
15	KIP-	474: To deprecate WindowStore#put(key, value)	2.	4.0 (WIP)
16	KIP-428471: Add in-memory window storeExpose RocksDB Metrics in Kafka Streams	2. 3 4.0 (WIP)
17	KIP-425: Add some Log4J Kafka Appender Properties for Producing to Secured Brokers467: Augment ProduceResponse error messaging for specific culprit records	2.34.0 (WIP)
18	KIP-420465: Add Single Value Fetch in Session StoresConsolidated Connector Endpoint to Connect REST API	2.23.0
19	KIP-421: Support resolving externalized secrets in AbstractConfig 464: Defaults for AdminClient#createTopic	2.34.0
20	KIP-412: Extend Admin API to support dynamic application log levels462: Use local thread id for KStreams	2.3.0 (WIP)
21	KIP-414: Expose Embedded ClientIds in Kafka Streams461: Improve Replica Fetcher behavior at handling partition failure	2.23.0
22	KIP-	460: Admin Leader Election RPC	2.	4.0
23	KIP-	458: Connector Client Config Override Policy	2.	3.0
24	KIP-393: Time windowed serde to properly deserialize changelog input topic455: Create an Administrative API for Replica Reassignment	2.24.0 (WIP)
25	KIP-386: Standardize on Min/Avg/Max metrics' default value454: Expansion of the ConnectClusterState interface	2.23.0
26	KIP-382: MirrorMaker 2.0453: Add close() method to RocksDBConfigSetter	2.3.0 (WIP)
27	KIP-	449: Add connector contexts to log messages in Connect workers	2.	3.0
28	KIP-377: TopicCommand to use AdminClient446: Add changelog topic configuration to KTable suppress	2.24.0 (WIP)
29	KIP-376: Implement AutoClosable on appropriate classes that want to be used in a try-with-resource statement445: In-memory Session Store	2.23.0
30	KIP- 374: Add '--help' option to all available Kafka CLI commands 443: Return to default segment.ms and segment.index.bytes in Streams repartition topics	2.23.0
31	KIP-372: Naming Repartition Topics for Joins and Grouping442: Return to default max poll interval in Streams	2.13.0
32	KIP-	440: Extend Connect Converter to support headers	2.	4.0 (WIP)
33	KIP	-436: Add a metric indicating start time	2.	3.0
34	KIP-367 Introduce close(Duration) to Producer and AdminClient instead of close(long, TimeUnit)434: Add Replica Fetcher and Log Cleaner Count Metrics	2.24.0 (WIP)
35	KIP	-430 - Return Authorized Operations in Describe Responses	2.	3.0
36	KIP-365: Materialized, Serialized, Joined, Consumed and Produced with implicit Serde429: Kafka Consumer Incremental Rebalance Protocol	2.14.0 (WIP)
37	KIP-	428: Add	in-memory window store	2.3.0
38	KIP-	427: Add AtMinIsr topic partition category (new metric & TopicCommand option)	2.3.0
39	KIP-358: Migrate Streams API to Duration instead of long ms times425: Add some Log4J Kafka Appender Properties for Producing to Secured Brokers	2.13.0
40	KIP-	421: Support resolving externalized secrets in AbstractConfig	2.	3.0
41	KIP-	420: Add	Single Value Fetch in Session Stores	2.	2.0
42	KIP-	417: Allow JmxTool to connect to a secured RMI port	2.	3.0
43	KIP-	415: Incremental Cooperative Rebalancing in Kafka Connect	2.3.0
44	KIP-346: Improve LogCleaner behavior on error414: Expose Embedded ClientIds in Kafka Streams	2.2.02.1
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-340: Allow kafka-reassign-partitions.sh and kafka-log-dirs.sh to take admin client property file402: Improve fairness in SocketServer processors	2.2.0 (partially implemented) / 2.32.1.0
48	KIP-339: Create a new IncrementalAlterConfigs API401: TransformerSupplier/ProcessorSupplier StateStore connecting	2.3.0 4.0 (WIP)
49	KIP-338 Support to exclude the internal topics in kafka-topics.sh command396: Add Commit/List Offsets Operations to AdminClient	2.14.0 (WIP)
50	KIP-336: Consolidate ExtendedSerializer/Serializer and ExtendedDeserializer/Deserializer394: Require member.id for initial join group request	2.12.0
51	KIP-	393: Time windowed serde to properly deserialize changelog input topic	2.	2.0
52	KIP-	389: Introduce a configurable consumer group size limit	2.	2.0
53	KIP-330: Add retentionPeriod in SessionBytesStoreSupplier386: Standardize on Min/Avg/Max metrics' default value	2.12.0
54	KIP-328: Ability to suppress updates for KTables382: MirrorMaker 2.0	1.0 (partially implemented) / 2.34.0 (WIP)
55	KIP-	379: Multiple Consumer Group Management	2.	4.0 (WIP)
56	KIP-	380: Detect outdated control requests and bounced brokers using broker generation	2.	2.0
57	KIP-321377: Update TopologyDescription to better represent Source and Sink NodesTopicCommand to use AdminClient	2.12.0
58	KIP-320: Allow fetchers to detect and handle log truncation376: Implement AutoClosable on appropriate classes that want to be used in a try-with-resource statement	2.1.0 (partially implemented) / 2.2.0
59	KIP-319: Replace segments with segmentInterval in WindowBytesStoreSupplier374: Add '--help' option to all available Kafka CLI commands	2.12.0
60	KIP-313: Add KStream.flatTransform and KStream.flatTransformValues 372: Naming Repartition Topics for Joins and Grouping	2.21.0 (partially implemented)/ 2.3.0
61	KIP-	371: Add a configuration to build custom SSL principal name	2.	2.0
62	KIP-308369: Support dynamic update of max.connections.per.ip/max.connections.per.ip.overridesAlternative Partitioner to Support "Always Round-Robin" Selection	2.14.0
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	.0
65	KIP-	366: Make FunctionConversions deprecated	2.	1.0
66	KIP-302 - Enable Kafka clients to use all DNS resolved IP addresses365: Materialized, Serialized, Joined, Consumed and Produced with implicit Serde	2.1.0
67	KIPK IP-298: Error Handling in Connect361: Add Consumer Configuration to Disable Auto Topic Creation	2.03.0
68	KIP-297: Externalizing Secrets for Connect Configurations360: Improve handling of unknown producer	2.04.0 (WIP)
69	KIP-295 Add Streams Configuration Allowing for Optional Topology Optimization359: Verify leader epoch in produce requests	2.04.0 (WIP)
70	KIP-294 - Enable TLS hostname verification by default358: 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
72	KIP-290: Support for Prefixed ACLs356: Add withCachingDisabled() to StoreBuilder	2.01.0
73	KIP-289: Improve the default group id behavior in KafkaConsumer354: Add a Maximum Log Compaction Lag	2.23.0
74	KIP-	353: Improve Kafka Streams Timestamp Synchronization	2.	1.0
75	KIP-284: Set default retention ms for Streams repartition topics to Long.MAX_VALUE352: Distinguish URPs caused by reassignment	2.04.0 (WIP)
76	KIP-283: Efficient Memory Usage for Down-Conversion351: Add --under-min-isr option to describe topics command	2.32.0.0
77	KIP-282: Add the listener name to the authentication context346: Improve LogCleaner behavior on error	2.0.01
78	KIP-281: ConsumerPerformance: Increase Polling Loop Timeout and Make It Reachable by the End User345: Introduce static membership protocol to reduce consumer rebalances	2.4.0 (WIP), partially available in 2.3.0
79	KIP-	342 Add support for custom SASL extensions in OAuthBearer authentication	2.	1.0
80	KIP-278 - Add version option to Kafka's commands341: Update Sticky Assignor's User Data Protocol	2.03.0
81	KIP-277 - Fine Grained ACL for CreateTopics API340: Allow kafka-reassign-partitions.sh and kafka-log-dirs.sh to take admin client property file	2.01.0
82	KIP-	339: Create a new IncrementalAlterConfigs API	2.	3.	0
83	KIP	-338 Support to exclude the internal topics in kafka-topics.sh command	2.	1.0
84	KIP-272: Add API version tag to broker's RequestsPerSec metric336: Consolidate ExtendedSerializer/Serializer and ExtendedDeserializer/Deserializer	2.01.0
85	KIP-	332: Update AclCommand to use AdminClient API	2.	1.0
86	KIP-	331 Add default implementation to close() and configure() for Serializer, Deserializer and Serde	2.	3.0
87	KIP-	330: Add	retentionPeriod in SessionBytesStoreSupplier	2.	1.0
88	KIP-266: Fix consumer indefinite blocking behavior328: 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-261: Add Single Value Fetch in Window Stores322: Return new error code for DeleteTopics API when topic deletion disabled.	2.01.0
91	KIP-258321: Allow to Store Record Timestamps in RocksDBUpdate TopologyDescription to better represent Source and Sink Nodes	2.31.0
92	KIP-	320: Allow fetchers to detect and handle log truncation	2.1.0 (partially implemented) / 2.2	.0
93	KIP-255: OAuth Authentication via SASL/OAUTHBEARER319: Replace segments with segmentInterval in WindowBytesStoreSupplier	2.01.0
94	KIP-	313: Add KStream.flatTransform and KStream.flatTransformValues	2.2.0 (partially implemented) / 2.3.	0
95	KIP-	312 Add Overloaded StreamsBuilder Build Method to Accept java.util.Properties	2.	1.0
96	KIP-247: Add public test utils for Kafka Streams	1.1.0	308: Support dynamic update of max.connections.per.ip/max.connections.per.ip.overrides	2.1.0
97	KIP-	307: Allow to define custom processor names with KStreams DSL	2.	3.0 (partial)
98	KIP-244: Add Record Header support to Kafka Streams Processor API306: Configuration for Delaying Response to Failed Authentication	2.01.0
99	KIP-243: Make ProducerConfig and ConsumerConfig constructors public305: Add Connect primitive number converters	2.01.1.0
100	KIP-	303: Add Dynamic Routing in Streams Sink	2.0	.0
101	KIP-	302 - Enable Kafka clients to use all DNS resolved IP addresses	2	.1.0
102	KIP-	300: Add Windowed KTable API in StreamsBuilder	2.	4.0
103	KIP-235: Add DNS alias support for secured connection298: Error Handling in Connect	2.10.0
104	KIP-	297: Externalizing Secrets for Connect Configurations	2.0	.0
105	KIP-231: Improve the Required ACL of ListGroups API295 Add Streams Configuration Allowing for Optional Topology Optimization	2.10.0
106	KIP	-294 - Enable TLS hostname verification by default	2.0	.0
107	KIP- 227 - Introduce Incremental FetchRequests to Increase Partition Scalability	1.1.0
108	KIP-226 - Dynamic Broker Configuration	1.1.0
109	KIP-225 - Use tags for consumer “records.lag” metrics	1.1.0
110	KIP-224: Add configuration parameter `retries` to Streams API	1.1.0
291: Separating controller connections and requests from the data plane	Accepted
108	KIP-292: Add transformValues() method to KTable	2.0.0
109	KIP-290: Support for Prefixed ACLs	2.0.0
110	KIP-289: Improve the default group id behavior in KafkaConsumer	2.2.0
111	KIP-285: Connect Rest Extension Plugin	2.0.0
112	KIP-284: Set default retention ms for Streams repartition topics to Long.MAX_VALUE	111		2.0.0
112113	KIP-	283: Efficient Memory Usage for Down-Conversion	2.0.0
113114	KIP-	282: Add	the listener name to the authentication context	1.1.0	114	KIP-219 - Improve quota communication	2.0.0
115	KIP-	281: ConsumerPerformance: Increase Polling Loop Timeout and Make It Reachable by the End User	2.0	.0
116	KIP-215: Add topic regex support for Connect sinks279: Fix log divergence between leader and follower after fast leader fail over	2.01.1.0
117	KIP-278 -	Add version option to Kafka's commands	2.0	.0
118	KIP-213 Support non-key joining in KTable277 - Fine Grained ACL for CreateTopics API	2.30.0 (WIP)
119	KIP-212: Enforce set of legal characters for connector names276 - Add StreamsConfig prefix for different consumers	2.01.1.0
120	KIP-211: Revise Expiration Semantics of Consumer Group Offsets274: Kafka Streams Skipped Records Metrics	2.10.0
121	KIP-	272: Add API version tag to broker's RequestsPerSec metric	2.0	.0
122	KIP-	270 - A Scala Wrapper Library for Kafka Streams	2.0	.0
123	KIP-207: Offsets returned by ListOffsetsResponse should be monotonically increasing even during a partition leader change268: Simplify Kafka Streams Rebalance Metadata Upgrade	2.20.0
124	KIP-	267: Add Processor Unit Test Support to Kafka Streams Test Utils	2.	0.0
125	KIP-	266: Fix consumer indefinite blocking behavior	2.0	.0
126	KIP-204 : Adding records deletion operation to the new Admin Client API265: Make Windowed Serde to public APIs	2.01.1.0
127	KIP-203: Add toLowerCase support to sasl.kerberos.principal.to.local rule261: Add Single Value Fetch in Window Stores	2.0 1.1.0
128	KIP-	258: Allow to Store Record Timestamps in RocksDB	2.3.0 (partially implemented)
129	KIP-198: Remove ZK dependency from Streams Reset Tool-257 - Configurable Quota Management	21.0.0
130	KIP-	255: OAuth Authentication via SASL/OAUTHBEARER	2	.0.0
131	KIP-196: Add metrics to Kafka Connect framework251: Allow timestamp manipulation in Processor API	21.0.0
132	KIP-195: AdminClient.createPartitions249: Add Delegation Token Operations to KafkaAdminClient	21.0.0
133	KIP-192 : Provide cleaner semantics when idempotence is enabled247: Add public test utils for Kafka Streams	1.01.0
134	KIP-191: KafkaConsumer.subscribe() overload that takes just Pattern245: Use Properties instead of StreamsConfig in KafkaStreams constructor	21.0.0
135	KIP-	244: Add Record Header support to Kafka Streams Processor API	2	.0.0
136	KIP-189: Improve principal builder interface and add support for SASL243: Make ProducerConfig and ConsumerConfig constructors public	1.01.0
137	KIP-188 - Add new metrics to support health checks239 Add queryableStoreName() to GlobalKTable	1.01.0
138	KIP-187 - Add cumulative count metric for all Kafka rate metrics238: Expose Kafka cluster ID in Connect REST API	1.01.0
139	KIP-186: Increase offsets retention default to 7 days237: More Controller Health Metrics	2.0.0
140	KIP-	235: Add DNS alias support for secured connection	2.	1.0
141	KIP-182: Reduce Streams DSL overloads and allow easier use of custom storage engines233: Simplify StreamsBuilder#addGlobalStore	1.01.0
142	KIP-	231: Improve the Required ACL of ListGroups API	2	.1.0
143	KIP-177: Consumer perf tool should count rebalance time229: DeleteGroups API	1.01.0
144	KIP-	227 - Introduce Incremental FetchRequests to Increase Partition Scalability	1.1	.0
145	KIP-175: Additional '--describe' views for ConsumerGroupCommand226 - Dynamic Broker Configuration	1.1.0
146	KIP-174 - Deprecate and remove internal converter configs in WorkerConfig225 - Use tags for consumer “records.lag” metrics	1.12.0.0
147	KIP-173224: Add prefix to StreamsConfig to enable setting default internal topic configsconfiguration parameter `retries` to Streams API	1.01.0
148	KIP-171 - Extend Consumer Group Reset Offset for Stream Application223 - Add per-topic min lead and per-partition lead metrics to KafkaConsumer	2.01.1.0
149	KIP-168: Add GlobalTopicCount and GlobalPartitionCount metric per cluster222 - Add Consumer Group operations to Admin API	21.0.0
150	KIP-167: Add interface for the state store restoration process221: Enhance DSL with Connecting Topic Creation and Repartition Hint	2.4.0 (WIP)1.0.0
151	KIP-164 - Add UnderMinIsrPartitionCount and per-partition UnderMinIsr metrics220: Add AdminClient into Kafka Streams' ClientSupplier	1.01.0
152	KIP	-219 - Improve quota communication	2	.0.0
153	KIP-162: Enable topic deletion by default218: Make KafkaFuture.Function java 8 lambda compatible	1.01.0
154	KIP-161: streams deserialization exception handlers215: Add topic regex support for Connect sinks	1.01.0
155	KIP-160: Augment KStream.print(), KStream.writeAsText() to allow users pass in extra parameters in the printed string214: Add zookeeper.max.in.flight.requests config to the broker	1.11.0.0
156	KIP-157 - Add consumer config options to streams reset tool213 Support non-key joining in KTable	2.4.0 (WIP)1.0.0
157	KIP-	212: Enforce set of legal characters for connector names	1.1	.0
158	KIP-	211: Revise Expiration Semantics of Consumer Group Offsets	2.1.0
159	KIP-154 Add Kafka Connect configuration properties for creating internal topics210 - Provide for custom error handling when Kafka Streams fails to produce	1.1.00.11.0.0
160	KIP-153: Include only client traffic in BytesOutPerSec metric208: Add SSL support to Kafka Connect REST interface	1.1.00.11.0.0
161	KIP-152 - Improve diagnostics for SASL authentication failures207: Offsets returned by ListOffsetsResponse should be monotonically increasing even during a partition leader change	2.21.0.0
162	KIP-	206: Add support for UUID serialization and deserialization	2.1.0
163	KIP-150 - Kafka-Streams Cogroup	2.3.0 (WIP)	205: Add all() and range() API to ReadOnlyWindowStore	1.1.0
164	KIP-149: Enabling key access in ValueTransformer, ValueMapper, and ValueJoiner204 : Adding records deletion operation to the new Admin Client API	1.1.0 (partially implemented)(WIP for 2.3.0)
165	KIP-146 - Classloading Isolation in Connect	0.11.0.0	166	KIP-145 - Expose Record Headers in Kafka Connect 203: Add toLowerCase support to sasl.kerberos.principal.to.local rule	1.1.0
167166	KIP-144: Exponential backoff for broker reconnect attempts202: Move merge() from StreamsBuilder to KStream	10.11.0.0
168167	KIP-143: Controller Health Metrics198: Remove ZK dependency from Streams Reset Tool	1.0.0
168	KIP-197 Connect REST API should include the connector type when describing a connector	10.11.0.0
169	KIP-140: Add administrative RPCs for adding, deleting, and listing ACLs196: Add metrics to Kafka Connect framework	10.11.0.0
170	KIP-138: Change punctuate semantics195: AdminClient.createPartitions	1.0.0
171	KIP-137: Enhance TopicCommand --describe to show topics marked for deletion192 : Provide cleaner semantics when idempotence is enabled	1.0.11.0.0
172	KIP-136: Add Listener name to SelectorMetrics tags191: KafkaConsumer.subscribe() overload that takes just Pattern	1.0.11.0.0
173	KIP-134: Delay initial consumer group rebalance190: Handle client-ids consistently between clients and brokers	10.11.0.0
174	KIP-133: Describe and Alter Configs Admin APIs189: Improve principal builder interface and add support for SASL	10.11.0.0
175	KIP	-188 - Add new metrics to support health checks	1.0.0
176	KIP-129: Streams Exactly-Once Semantics187 - Add cumulative count metric for all Kafka rate metrics	1.0.11.0.0
177	KIP-128: Add ByteArrayConverter for Kafka Connect186: Increase offsets retention default to 7 days	2.0.11.0.0
178	KIP-126 183 - Allow KafkaProducer to split and resend oversized batches.Change PreferredReplicaLeaderElectionCommand to use AdminClient	2.20.11.0.0
179	KIP-124 - Request rate quotas182: Reduce Streams DSL overloads and allow easier use of custom storage engines	1.0.11.0.0
180	KIP-123: Allow per stream/table timestamp extractor180: Add a broker metric specifying the number of consumer group rebalances in progress	1.10.11.0.0
181	KIP-122177: Add Reset Consumer Group Offsets toolingConsumer perf tool should count rebalance time	10.11.0.0
182	KIP-	176: Remove deprecated new-consumer option for tools	2	.0.0
183	KIP-120: Cleanup Kafka Streams builder API175: Additional '--describe' views for ConsumerGroupCommand	1.01.0
184	KIP-119: Drop Support for Scala 2.10 in Kafka 0.11	0.11.0.0	174 - Deprecate and remove internal converter configs in WorkerConfig	2.0.0
185	KIP-118: Drop Support for Java 7173: Add prefix to StreamsConfig to enable setting default internal topic configs	12.0.0
186	KIP-117: Add a public AdminClient API for Kafka admin operations-171 - Extend Consumer Group Reset Offset for Stream Application	1.10.11.0.0
187	KIP-115: Enforce offsets.topic.replication.factor upon __consumer_offsets 168: Add GlobalTopicCount and GlobalPartitionCount metric per cluster	1 auto topic creation0.11.0.0
188	KIP-114: KTable state stores and improved semantics167: Add interface for the state store restoration process	1.0.11.0.0
189	KIP- 113: Support replicas movement between log directories 164 - Add UnderMinIsrPartitionCount and per-partition UnderMinIsr metrics	1.10.0
190	KIP-	163: Lower the Minimum Required ACL Permission of OffsetFetch	1.0.0
191	KIP-	162: Enable topic deletion by default	1.0	.0
192	KIP-109: Old Consumer Deprecation161: streams deserialization exception handlers	1.0.11.0.0
193	KIP-108: Create Topic Policy160: Augment KStream.print(), KStream.writeAsText() to allow users pass in extra parameters in the printed string	1.00.10.2.0
194	KIP-	157 - Add consumer config options to streams reset tool	1.	0.0
195	KIP-	156 Add option "dry run" to Streams application reset tool	0.11.0.0
196	KIP-	155 - Add range scan for windowed state stores	0.	11.	0.0
197	KIP-104: Granular Sensors for Streams 154 Add Kafka Connect configuration properties for creating internal topics	0.1011.20.0
198	KIP-103: Separation of Internal and External traffic153: Include only client traffic in BytesOutPerSec metric	0.1011.20.0
199	KIP-102 - Add close with timeout for consumers152 - Improve diagnostics for SASL authentication failures	1.0.0.10.2.0
200	KIP-101 - Alter Replication Protocol to use Leader Epoch rather than High Watermark for Truncation151 Expose Connector type in REST API	0.11.0.0
201	KIP-100 150 - Relax Type constraints in Kafka-Streams APICogroup	02.10.2.04.0 (WIP)
202	KIP-99: Add Global Tables to Kafka Streams149: Enabling key access in ValueTransformer, ValueMapper, and ValueJoiner	1.1.0 (partially implemented) (WIP for 2.4.0)0.10.2.0
203	KIP-98 - Exactly Once Delivery and Transactional Messaging146 - Classloading Isolation in Connect	0.11.0.0
204	KIP-97: Improved Kafka Client RPC Compatibility Policy-145 - Expose Record Headers in Kafka Connect	1.1.0.10.2.0
205	KIP-96 - Add per partition metrics for in-sync and assigned replica count144: Exponential backoff for broker reconnect attempts	0.1011.20.0
206	KIP-94 Session Windows143: Controller Health Metrics	0.1011.20.0
207	KIP-93: Improve invalid timestamp handling in Kafka Streams140: Add administrative RPCs for adding, deleting, and listing ACLs	0.1011.20.0
208	KIP-92 - Add per partition lag metrics to KafkaConsumer138: Change punctuate semantics	1.0.0.10.2.0
209	KIP-91 Provide Intuitive User Timeouts in The Producer137: Enhance TopicCommand --describe to show topics marked for deletion	0.11.02.1.0
210	KIP-90 - Remove zkClient dependency from Streams136: Add Listener name to SelectorMetrics tags	0.1011.20.0
211	KIP-89: Allow sink connectors to decouple flush and offset commit134: Delay initial consumer group rebalance	0.1011.20.0
212	KIP-88: OffsetFetch Protocol Update133: Describe and Alter Configs Admin APIs	0.1011.20.0
213	KIP-	130: Expose states of active tasks to KafkaStreams public API	1	.0.0
214	KIP-85: Dynamic JAAS configuration for Kafka clients129: Streams Exactly-Once Semantics	0.1011.20.0
215	KIP-84: Support SASL SCRAM mechanisms128: Add ByteArrayConverter for Kafka Connect	0.1011.20.0
216	KIP-82 - Add Record Headers126 - Allow KafkaProducer to split and resend oversized batches.	0.11.0.0
217	KIP-81: Bound Fetch memory usage in the consumer124 - Request rate quotas	0.11.0.02.2.0 (WIP)
218	KIP-79 - ListOffsetRequest/ListOffsetResponse v1 and add timestamp search methods to the new consumer123: Allow per stream/table timestamp extractor	0.1011.10.0
219	KIP-78: Cluster Id122: Add Reset Consumer Group Offsets tooling	0.1011.10.0
220	KIP-77: Improve Kafka Streams Join Semantics121: Add KStream peek method	0. 10 11. 2 0.0
221	KIP-75 - Add per-connector Converters120: Cleanup Kafka Streams builder API	1.0.0.10.1.0
222	KIP-74: Add Fetch Response Size Limit in Bytes119: Drop Support for Scala 2.10 in Kafka 0.11	0.1011.10.0
223	KIP-73: Replication Quotas118: Drop Support for Java 7	2.00.10.1.0
224	KIP-72117: Allow putting a bound on memory consumed by Incoming request Add a public AdminClient API for Kafka admin operations	0.111.0.0
225	KIP-71: Enable log compaction and deletion to co-exist115: Enforce offsets.topic.replication.factor upon __consumer_offsets auto topic creation	0.1011.10.0
226	KIP-70: Revise Partition Assignment Semantics on New Consumer's Subscription Change114: KTable state stores and improved semantics	0.1011.10.0
227	KIP-67: Queryable state for Kafka Streams113: Support replicas movement between log directories	1.0.10.1.0
228	KIP-66: Single Message Transforms for Kafka Connect112: Handle disk failure for JBOD	10.10.2.0 / 0.11.0.0
229	KIP-	110: Add Codec for ZStandard Compression	2	.1.0
230	KIP-63: Unify store and downstream caching in streams109: Old Consumer Deprecation	0.11.00.10.1.0
231	KIP-62: Allow consumer to send heartbeats from a background thread108: Create Topic Policy	0.10.12.0
232	KIP-60 - Make Java client classloading more flexible107: Add deleteRecordsBefore() API in AdminClient	0.1011.10.0
233	KIP- 58 - Make Log Compaction Point Configurable 106 - Change Default unclean.leader.election.enabled from True to False	0.1011.10.0
234	KIP-57 - Interoperable LZ4 Framing105: Addition of Record Level for Sensors	0.10.02.0
235	KIP-56: Allow cross origin HTTP requests on all HTTP methods104: Granular Sensors for Streams	0.10.02.0
236	KIP-55: Secure Quotas for Authenticated Users103: Separation of Internal and External traffic	0.10.12.0
237	KIP-54: Sticky Partition Assignment Strategy-102 - Add close with timeout for consumers	0.1110.02.0
238	KIP-52: Connector Control APIs101 - Alter Replication Protocol to use Leader Epoch rather than High Watermark for Truncation	0.1011.0.0
239	KIP-51 - List Connectors REST 100 - Relax Type constraints in Kafka Streams API	0.10.02.0
240	KIP-50 - Move Authorizer to o.a.k.common package99: Add Global Tables to Kafka Streams	0.10.12.0
241	KIP-48 Delegation token support for Kafka	1.1.0	242	KIP-45 - Standardize all client sequence interaction on j.u.Collection.98 - Exactly Once Delivery and Transactional Messaging	0.1011.0.0
243242	KIP-4397: Kafka SASL enhancementsImproved Kafka Client RPC Compatibility Policy	0.10.02.0
244243	KIP-42: Add Producer and Consumer Interceptors96 - Add per partition metrics for in-sync and assigned replica count	0.10.2.0
244	KIP-94 Session Windows	0.10.2.0
245	KIP-41: Consumer Max Records93: Improve invalid timestamp handling in Kafka Streams	0.10.02.0
246	KIP-40: ListGroups and DescribeGroup-92 - Add per partition lag metrics to KafkaConsumer	0.910.02.0
247	KIP-38: ZooKeeper Authentication91 Provide Intuitive User Timeouts in The Producer	2.1.00.9.0.0
248	KIP-36 - Rack aware replica assignment90 - Remove zkClient dependency from Streams	0.10.02.0
249	KIP-35 - Retrieving protocol version89: Allow sink connectors to decouple flush and offset commit	0.10.02.0
250	KIP-33 - Add a time based log index88: OffsetFetch Protocol Update	0.10.12.0
251	KIP-32 - Add timestamps to Kafka message86: Configurable SASL callback handlers	2.0.10.0.0
252	KIP-31 - Move to relative offsets in compressed message sets85: Dynamic JAAS configuration for Kafka clients	0.10.02.0
253	KIP-28 - Add a processor client84: Support SASL SCRAM mechanisms	0.10.02.0
254	KIP-26 82 - Add Kafka Connect framework for data import/exportRecord Headers	0.911.0.0
255	KIP-25 - System test improvements81: Bound Fetch memory usage in the consumer	2.4.0 (WIP)0.9.0.0
256	KIP-22 - Expose a Partitioner interface in the new producer79 - ListOffsetRequest/ListOffsetResponse v1 and add timestamp search methods to the new consumer	0.910.01.0
257	KIP-21 - Dynamic Configuration78: Cluster Id	0.910.01.0 (WIP)
258	KIP-20 Enable log preallocate to improve consume performance under windows and some old Linux file system77: Improve Kafka Streams Join Semantics	0.910.02.0
259	KIP-19 75 - Add a request timeout to NetworkClientper-connector Converters	0.910.01.0
260	KIP-16 - Automated Replica Lag Tuning74: Add Fetch Response Size Limit in Bytes	0.910.01.0
261	KIP-15 - Add a close method with a timeout in the producer73: Replication Quotas	0.910.01.0
262	KIP-13 - Quota Design72: Allow putting a bound on memory consumed by Incoming request	10.9.0.0
263	KIP-12 - Kafka Sasl/Kerberos and SSL implementation71: Enable log compaction and deletion to co-exist	0.910.01.0
264	KIP-11 - Kafka Authorizer design70: Revise Partition Assignment Semantics on New Consumer's Subscription Change	0.910.01.0
265	KIP-8 - Add a flush method to the producer API67: Queryable state for Kafka Streams	0.910.01.0
266	KIP-4 - Metadata Protocol Changes66: Single Message Transforms for Kafka Connect	0.10.2.0 / 0.11.0.0
267	KIP-4 - Command line and centralized administrative operations65: Expose timestamps to Connect	0.910.01.0,
268	KIP-63: Unify store and downstream caching in streams	0.10.01.0,
269	KIP-62: Allow consumer to send heartbeats from a background thread	0.10.1.0
268270	KIP-3 - Mirror Maker Enhancement60 - Make Java client classloading more flexible	0.910.01.0
269271	KIP-2 - Refactor brokers to allow listening on multiple ports and IPs58 - Make Log Compaction Point Configurable	0.910.01.0
270272	KIP-1 - Remove support of request.required.acks57 - Interoperable LZ4 Framing	0.910.0.0

...

273	KIP-56: Allow cross origin HTTP requests on all HTTP methods	0.10.0.0
274	KIP-55: Secure Quotas for Authenticated Users	0.10.1.0
275	KIP-54: Sticky Partition Assignment Strategy	0.11.0.0
276	KIP-52: Connector Control APIs	0.10.0.0
277	KIP-51 - List Connectors REST API	0.10.0.0
278	KIP-48 Delegation token support for Kafka	1.1.0
279	KIP-45 - Standardize all client sequence interaction on j.u.Collection.	0.10.0.0
280	KIP-43: Kafka SASL enhancements	0.10.0.0
281	KIP-42: Add Producer and Consumer Interceptors	0.10.0.0
282	KIP-41: Consumer Max Records	0.10.0.0
283	KIP-40: ListGroups and DescribeGroup	0.9.0.0
284	KIP-38: ZooKeeper Authentication	0.9.0.0
285	KIP-36 - Rack aware replica assignment	0.10.0.0
286	KIP-35 - Retrieving protocol version	0.10.0.0
287	KIP-33 - Add a time based log index	0.10.1.0
288	KIP-32 - Add timestamps to Kafka message	0.10.0.0
289	KIP-31 - Move to relative offsets in compressed message sets	0.10.0.0
290	KIP-28 - Add a processor client	0.10.0.0
291	KIP-26 - Add Kafka Connect framework for data import/export	0.9.0.0
292	KIP-25 - System test improvements	0.9.0.0
293	KIP-22 - Expose a Partitioner interface in the new producer	0.9.0.0
294	KIP-21 - Dynamic Configuration	0.9.0.0 (WIP)
295	KIP-20 Enable log preallocate to improve consume performance under windows and some old Linux file system	0.9.0.0
296	KIP-19 - Add a request timeout to NetworkClient	0.9.0.0
297	KIP-16 - Automated Replica Lag Tuning	0.9.0.0
298	KIP-15 - Add a close method with a timeout in the producer	0.9.0.0
299	KIP-13 - Quota Design	0.9.0.0
300	KIP-12 - Kafka Sasl/Kerberos and SSL implementation	0.9.0.0
301	KIP-11 - Kafka Authorizer design	0.9.0.0
302	KIP-8 - Add a flush method to the producer API	0.9.0.0
303	KIP-4 - Metadata Protocol Changes	0.10.0.0
304	KIP-4 - Command line and centralized administrative operations	0.9.0.0, 0.10.0.0, 0.10.1.0
305	KIP-3 - Mirror Maker Enhancement	0.9.0.0
306	KIP-2 - Refactor brokers to allow listening on multiple ports and IPs	0.9.0.0
307	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-309: Add toUpperCase support to sasl.kerberos.principal.to.local rule	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

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

406: GlobalStreamThread should honor custom offset policy.Discussion

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-307: Allow to define custom processor names with KStreams DSL	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 replica438: Expose task, connector IDs in Connect API	Discussion
KIP-395439: Encypt-then-MAC Delegation token metadataCleanup built-in Store interfaces	Discussion
KIP-441: Smooth Scaling Out for Kafka Streams	Discussion
KIP-396: Add Commit/List Offsets Operations to AdminClient444: Augment metrics for Kafka Streams	Discussion
KIP-397: Add methods to override fetch offsets based on timestamp447: Producer scalability for exactly once semantics	Discussion
KIP-398448: Support reading trust store from classpathAdd State Stores Unit Test Support to Kafka Streams Test Utils	Discussion
KIP-399: Extend ProductionExceptionHandler to cover serialization exceptions450: Sliding Window Aggregations in the DSL	Discussion
KIP-400: Improve exit status in case of errors in ConsoleProducer452: Tool to view cluster status	Discussion, JIRA existsDiscussion
KIP-401: TransformerSupplier/ProcessorSupplier StateStore connecting457: Add DISCONNECTED status to Kafka Streams	Discussion Voting in progress
KIP-403: Increase ProducerPerformance precision by using nanoTime459: Improve KafkaStreams#close	DiscussionDraft
KIP-405: Kafka Tiered Storage463: Auto-configure non-default Serdes passed alongside the TopologyBuilder	Under discussionDiscussion
KIP-	466: Add support for List<T> serialization and deserialization	Voting in progress
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
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	Under discussion
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	Under discussion
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-410: Add metric for request handler thread pool utilization by request type	Discussion
KIP-411: Make default Kafka Connect worker task client IDs distinct	Accepted
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	Voting in progress
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-464: Defaults for AdminClient#createTopic	Discussion

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