Page History

...

Click
Create from template
templateName 54329345
templateId 54329345
title KIP-NEXT: Insert Title Here
buttonLabel Create KIP
. 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: 476529

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

...

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

354 Add a Maximum Log Compaction Lag2465: Add Consolidated Connector Endpoint to Connect REST API3460: Admin Leader Election RPC449: Add connector contexts to log messages in Connect workers 3446: Add changelog topic configuration to KTable suppress (WIP)445: In-memory Session Store3442 Return to default max poll interval in Streams3436: Add a metric indicating start time3430 - Return Authorized Operations in Describe Responses3428: Add in-memory window store3427: Add AtMinIsr topic partition category (new metric & TopicCommand option)420: Add Single Value Fetch in Session Stores2412: Extend Admin API to support dvynamic application log levels4 (WIP)411: Make default Kafka Connect worker task client IDs distinct402: Improve fairness in SocketServer processors2.2.0 (partially implemented) / 2.36372: Naming Repartition Topics for Joins and Grouping138 368: Allow SASL Connections to Periodically Re-Authenticate241365: Materialized, Serialized, Joined, Consumed and Produced with implicit Serde142KIP361: Add Consumer Configuration to Disable Auto Topic Creation44358 Migrate Streams API to Duration instead of long ms times14647340: Allow kafka-reassign-partitions.sh and kafka-log-dirs.sh to take admin client property file1336: Consolidate ExtendedSerializer/Serializer and ExtendedDeserializer/Deserializer1332: Update AclCommand to use AdminClient API1321 Update TopologyDescription to better represent Source and Sink Nodes1-320 fetchers to detect and handle log truncation1.0 (partially implemented) / 2.313: Add KStream.flatTransform and KStream.flatTransformValues 2 (partially implemented)KIP308: Support dynamic update of max.connections.per.ip/max.connections.per.ip.overrides1305: Add Connect primitive number converters0303 Dynamic Routing in Streams Sink0285: Connect Rest Extension Plugin0281: ConsumerPerformance: Increase Polling Loop Timeout and Make It Reachable by the End User2.0279: Fix log divergence between leader and follower after fast leader fail over0276 - Add StreamsConfig prefix for different consumers0268: Simplify Kafka Streams Rebalance Metadata Upgrade0267: Add Processor Unit Test Support to Kafka Streams Test Utils2.0.261: Add Single Value Fetch in Window Stores0251: Allow timestamp manipulation in Processor API0249 Delegation Token Operations to KafkaAdminClient0247: Add public test utils for Kafka Streams1.1245: Use Properties instead of StreamsConfig in KafkaStreams constructor-243: Make ProducerConfig and ConsumerConfig constructors public1.1238: Expose Kafka cluster ID in Connect REST API1.1237: More Controller Health Metrics229: 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 KafkaConsumer219 - Improve quota communication-218: Make KafkaFuture.Function java 8 lambda compatible1.1210 - Provide for custom error handling when Kafka Streams fails to produce1.1.0207: Offsets returned by ListOffsetsResponse should be monotonically increasing even during a partition leader change2.2.206: Add support for UUID serialization and deserialization1202: Move merge() from StreamsBuilder to KStream1192 : Provide cleaner semantics when idempotence is enabled1.0190: Handle client-ids consistently between clients and brokers.0KIP-176: Remove deprecated new-consumer option for tools155171 - Extend Consumer Group Reset Offset for Stream Application173120: Cleanup Kafka Streams builder API115: Enforce offsets.topic.replication.factor upon __consumer_offsets auto topic creation0.11.114: KTable state stores and improved semantics113: Support replicas movement between log directories1.1110: Add Codec for ZStandard Compression2.194 Session Windows0.10.274 Fetch Response Size Limit in Bytes0.10.

	KIP (please keep this sorted by KIP number)	Release
1	KIP-	500:	Replace ZooKeeper with a Self-Managed Metadata Quorum
2	2.3.0		KIP-	482: The Kafka Protocol should Support Optional Tagged Fields	2.	4.0 (WIP)
3	KIP-464: Defaults for AdminClient#createTopic504 - Add new Java Authorizer Interface	2.4.0 (WIP)
4	KIP-462: Use local thread id for KStreams503: Add metric for number of topics marked for deletion	2.34.0 (WIP)
5	KIP-461: Improve Replica Fetcher behavior at handling partition failure497: Add inter-broker API to alter ISR	2.34.0 (WIP)
6	KIP-	496: Administrative API to delete consumer offsets	2.4.0 (WIP)
7	KIP-458: Connector Client Config Override Policy495: Dynamically Adjust Log Levels in Connect	2.34.0 (WIP)
8	KIP-454: Expansion of the ConnectClusterState interface488: Clean up Sum,Count,Total Metrics	2.34.0
9	KIP-453: Add close() method to RocksDBConfigSetter484: Expose metrics for group and transaction metadata loading duration	2.34.0 (WIP)
10	KIP-	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-443: Return to default segment.ms and segment.index.bytes in Streams repartition topics476: Add Java AdminClient Interface	2.34.0
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-	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-	465: Add Consolidated Connector Endpoint to Connect REST API	2.3.0
19	KIP-425: Add some Log4J Kafka Appender Properties for Producing to Secured Brokers464: Defaults for AdminClient#createTopic	2.34.0
20	KIP-421: Support resolving externalized secrets in AbstractConfig 462: Use local thread id for KStreams	2.3.0
21	KIP-	461: Improve Replica Fetcher behavior at handling partition failure	2.	3.0
22	KIP-417: Allow JmxTool to connect to a secured RMI port460: Admin Leader Election RPC	2.34.0
23	KIP-415: Incremental Cooperative Rebalancing in Kafka Connect458: Connector Client Config Override Policy	2.3.0
24	KIP-414: Expose Embedded ClientIds in Kafka Streams455: Create an Administrative API for Replica Reassignment	2.24.0 (WIP)
25	KIP-	454: Expansion of the ConnectClusterState interface	2.	3.0
26	KIP-	453: Add close() method to RocksDBConfigSetter	2.3.0
27	KIP-	449: Add connector contexts to log messages in Connect workers	2.	3.0
28	KIP-394: Require member.id for initial join group request446: Add changelog topic configuration to KTable suppress	2.24.0 (WIP)
29	KIP-393: Time windowed serde to properly deserialize changelog input topic445: In-memory Session Store	2.32.2.0
30	KIP- 386: Standardize on Min/Avg/Max metrics' default value 443: Return to default segment.ms and segment.index.bytes in Streams repartition topics	2.23.0
31	KIP-442: Return to default max poll interval in Streams	382: MirrorMaker 2.3.0
32	KIP-440: Extend Connect Converter to support headers	2.4.0 (WIP)
3233	KIP-380: Detect outdated control requests and bounced brokers using broker generation436: Add a metric indicating start time	2.23.0
3334	KIP-377: TopicCommand to use AdminClient434: Add Replica Fetcher and Log Cleaner Count Metrics	2.24.0 (WIP)
3435	KIP-376: Implement AutoClosable on appropriate classes that want to be used in a try-with-resource statement-430 - Return Authorized Operations in Describe Responses	2.23.0
3536	KIP-374: Add '--help' option to all available Kafka CLI commands429: Kafka Consumer Incremental Rebalance Protocol	2.24.0 (WIP)
37	KIP-	428: Add in-memory window store	2.	3.0
3738	KIP-371: Add a configuration to build custom SSL principal name427: Add AtMinIsr topic partition category (new metric & TopicCommand option)	2.23.0
39	KIP	-425: Add some Log4J Kafka Appender Properties for Producing to Secured Brokers	2.	3.0
3940	KIP-367 Introduce close(Duration) to Producer and AdminClient instead of close(long, TimeUnit)421: Support resolving externalized secrets in AbstractConfig	2.23.0
4041	KIP-366: Make FunctionConversions deprecated420: Add Single Value Fetch in Session Stores	2.12.0
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
4344	KIP-359: Verify leader epoch in produce requests414: Expose Embedded ClientIds in Kafka Streams	2.42.0 (WIP)
45	KIP-	412:	Extend Admin API to support dynamic application log levels	2.	4.0 (WIP)
4546	KIP- 357: Add support to list ACLs per principal 411: Make default Kafka Connect worker task client IDs distinct	2.13.0
47	KIP-356: Add withCachingDisabled() to StoreBuilder402: Improve fairness in SocketServer processors	2.2.0 (partially implemented) / 2.32.1.0
48	KIP-353: Improve Kafka Streams Timestamp Synchronization401: TransformerSupplier/ProcessorSupplier StateStore connecting	2.14.0 (WIP)
4849	KIP-351396: Add --under-min-isr option to describe topics commandCommit/List Offsets Operations to AdminClient	2.34.0 (WIP)
4950	KIP-346: Improve LogCleaner behavior on error	2.1	50	KIP-342 Add support for custom SASL extensions in OAuthBearer authentication	394: Require member.id for initial join group request	2.22.1.0
51	KIP-341: Update Sticky Assignor's User Data Protocol393: Time windowed serde to properly deserialize changelog input topic	2.32.0
52	KIP-	389: Introduce a configurable consumer group size limit	2.	2.0
53	KIP-339: Create a new IncrementalAlterConfigs API386: Standardize on Min/Avg/Max metrics' default value	2.32.0 0
54	KIP-338 Support to exclude the internal topics in kafka-topics.sh command382: MirrorMaker 2.0	2.14.0
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-331 Add default implementation to close() and configure() for Serializer, Deserializer and Serde377: TopicCommand to use AdminClient	2.32.0
58	KIP-330: Add retentionPeriod in SessionBytesStoreSupplier376: Implement AutoClosable on appropriate classes that want to be used in a try-with-resource statement	2.12.0
59	KIP-328: Ability to suppress updates for KTables374: Add '--help' option to all available Kafka CLI commands	2.2.02.1.0 (partially implemented) / 2.3.0 (WIP)
60	KIP-324: Add method to get metrics() in AdminClient372: Naming Repartition Topics for Joins and Grouping	2.1.0
61	KIP-322: Return new error code for DeleteTopics API when topic deletion disabled.371: Add a configuration to build custom SSL principal name	2.12.0
62	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-319: Replace segments with segmentInterval in WindowBytesStoreSupplier367 Introduce close(Duration) to Producer and AdminClient instead of close(long, TimeUnit)	2.12.0
65	KIP-	366: Make FunctionConversions deprecated	2.	1.0	/ 2.3.0
66	KIP-312 Add Overloaded StreamsBuilder Build Method to Accept java.util.Properties365: Materialized, Serialized, Joined, Consumed and Produced with implicit Serde	2.1.0
67	K IP-	361: Add Consumer Configuration to Disable Auto Topic Creation	2.	3.0
68	KIP-307: Allow to define custom processor names with KStreams DSL360: Improve handling of unknown producer	2.34.0 (partialWIP)
69	KIP-306: Configuration for Delaying Response to Failed Authentication359: Verify leader epoch in produce requests	2.14.0 (WIP)
70	KIP-	358: Migrate Streams API to Duration instead of long ms times	2.	1.0
71	KIP-	357: Add	support to list ACLs per principal	2.	1.0
72	KIP-302 - Enable Kafka clients to use all DNS resolved IP addresses356: Add withCachingDisabled() to StoreBuilder	2.1.0
73	KIP-300354: Add Windowed KTable API in StreamsBuildera Maximum Log Compaction Lag	2.43.0
74	KIP-298: Error Handling in Connect353: Improve Kafka Streams Timestamp Synchronization	2.01.0
75	KIP-297: Externalizing Secrets for Connect Configurations352: Distinguish URPs caused by reassignment	2.04.0 (WIP)
76	KIP-295 Add Streams Configuration Allowing for Optional Topology Optimization351: Add --under-min-isr option to describe topics command	2.03.0
77	KIP-294 - Enable TLS hostname verification by default346: Improve LogCleaner behavior on error	2.0.01
78	KIP-292: Add transformValues() method to KTable345: Introduce static membership protocol to reduce consumer rebalances	2.4.0 (WIP), partially available in 2.32.0.0
79	KIP-290: Support for Prefixed ACLs342 Add support for custom SASL extensions in OAuthBearer authentication	2.01.0
80	KIP-289: Improve the default group id behavior in KafkaConsumer341: Update Sticky Assignor's User Data Protocol	2.23.0
81	KIP-	340: Allow kafka-reassign-partitions.sh and kafka-log-dirs.sh to take admin client property file	2.	1.0
82	KIP-284: Set default retention ms for Streams repartition topics to Long.MAX_VALUE339: Create a new IncrementalAlterConfigs API	2.03.00
83	KIP-283: Efficient Memory Usage for Down-Conversion338 Support to exclude the internal topics in kafka-topics.sh command	2.01.0
84	KIP-282: Add the listener name to the authentication context336: 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-278 - Add version option to Kafka's commands330: Add retentionPeriod in SessionBytesStoreSupplier	2.01.0
88	KIP-277 - Fine Grained ACL for CreateTopics API328: 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-274: Kafka Streams Skipped Records Metrics322: Return new error code for DeleteTopics API when topic deletion disabled.	2.01.0
91	KIP-272: Add API version tag to broker's RequestsPerSec metric321: Update TopologyDescription to better represent Source and Sink Nodes	2.01.0
92	KIP-270 - A Scala Wrapper Library for Kafka Streams320: Allow fetchers to detect and handle log truncation	2.1.0 (partially implemented) / 2.22.0.0
93	KIP-	319: Replace segments with segmentInterval in WindowBytesStoreSupplier	2.	1.0
94	KIP-	313: Add KStream.flatTransform and KStream.flatTransformValues	2.2.0 (partially implemented) / 2.3.	0
95	KIP-266: Fix consumer indefinite blocking behavior312 Add Overloaded StreamsBuilder Build Method to Accept java.util.Properties	2.01.0
96	KIP-265: Make Windowed Serde to public APIs308: Support dynamic update of max.connections.per.ip/max.connections.per.ip.overrides	2.01.0
97	KIP-	307: Allow to define custom processor names with KStreams DSL	2.	3.0 (partial)
98	KIP-258: Allow to Store Record Timestamps in RocksDB306: Configuration for Delaying Response to Failed Authentication	2.31.0 (partially implemented)
99	KIP-257 - Configurable Quota Management305: Add Connect primitive number converters	2.0.0
100	KIP-255: OAuth Authentication via SASL/OAUTHBEARER303: 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-	298: Error Handling in Connect	2.0	.0
104	KIP-	297: Externalizing Secrets for Connect Configurations	2.0.0
105	KIP-244: Add Record Header support to Kafka Streams Processor API295 Add Streams Configuration Allowing for Optional Topology Optimization	2.0.0
106	KIP	-294 - Enable TLS hostname verification by default	2.0	.0
107	KIP- 239 Add queryableStoreName() to GlobalKTable 291: Separating controller connections and requests from the data plane	Accepted1.1.0
108	KIP-	292: Add transformValues() method to KTable	2.0	.0
109	KIP-	290: Support for Prefixed ACLs	2.0.0
110	KIP-235: Add DNS alias support for secured connection289: Improve the default group id behavior in KafkaConsumer	2.12.0
111	KIP-233: Simplify StreamsBuilder#addGlobalStore285: Connect Rest Extension Plugin	2.01.1.0
112	KIP-231: Improve the Required ACL of ListGroups API284: Set default retention ms for Streams repartition topics to Long.MAX_VALUE	2.10.0
113	KIP-	283: Efficient Memory Usage for Down-Conversion	2.0	.0
114	KIP-	282: Add the listener name to the authentication context	2.0	.0
115	KIP-	281: ConsumerPerformance: Increase Polling Loop Timeout and Make It Reachable by the End User	2.0	.0
116	KIP-225 - Use tags for consumer “records.lag” metrics279: 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-	277 - Fine Grained ACL for CreateTopics API	2.0.0
119	KIP-222 276 - Add Consumer Group operations to Admin APIStreamsConfig prefix for different consumers	2.0.0
120	KIP-220274: Add AdminClient into Kafka Streams ' ClientSupplierSkipped Records Metrics	2.01.1.0
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-215: Add topic regex support for Connect sinks268: Simplify Kafka Streams Rebalance Metadata Upgrade	2.01.1.0
124	KIP-214267: Add zookeeper.max.in.flight.requests config to the brokerProcessor Unit Test Support to Kafka Streams Test Utils	2.01.1.0
125	KIP-213 Support non-key joining in KTable266: Fix consumer indefinite blocking behavior	2.40.0 (WIP)
126	KIP-212: Enforce set of legal characters for connector names265: Make Windowed Serde to public APIs	2.01.1.0
127	KIP-211: Revise Expiration Semantics of Consumer Group Offsets261: Add Single Value Fetch in Window Stores	2.10.0
128	KIP-	258: Allow to Store Record Timestamps in RocksDB	2.3.0 (partially implemented)
129	KIP-208: Add SSL support to Kafka Connect REST interface257 - Configurable Quota Management	2.01.1.0
130	KIP-	255: OAuth Authentication via SASL/OAUTHBEARER	2.0.	0
131	KIP-	251: Allow timestamp manipulation in Processor API	2.	0.0
132	KIP-205249: Add all() and range() API to ReadOnlyWindowStoreDelegation Token Operations to KafkaAdminClient	2.01.1.0
133	KIP-204 : Adding records deletion operation to the new Admin Client API247: Add public test utils for Kafka Streams	1.1.0
134	KIP-245: Use Properties instead of StreamsConfig in KafkaStreams constructor	2.0203: Add toLowerCase support to sasl.kerberos.principal.to.local rule 1.1.0
135	KIP-	244: Add Record Header support to Kafka Streams Processor API	2	.0.0
136	KIP-198: Remove ZK dependency from Streams Reset Tool243: Make ProducerConfig and ConsumerConfig constructors public	1.01.0
137	KIP-197 Connect REST API should include the connector type when describing a connector239 Add queryableStoreName() to GlobalKTable	1.01.0
138	KIP-196238: Add metrics to Kafka Connect frameworkExpose Kafka cluster ID in Connect REST API	1.01.0
139	KIP-195: AdminClient.createPartitions237: More Controller Health Metrics	21.0.0
140	KIP-	235: Add DNS alias support for secured connection	2.1	.0
141	KIP-191: KafkaConsumer.subscribe() overload that takes just Pattern233: Simplify StreamsBuilder#addGlobalStore	1.01.0
142	KIP-	231: Improve the Required ACL of ListGroups API	2.	1.0
143	KIP-189: Improve principal builder interface and add support for SASL229: DeleteGroups API	1.01.0
144	KIP-188 - Add new metrics to support health checks	1.0.0
145	KIP-187 - Add cumulative count metric for all Kafka rate metrics	1.0.0
146	KIP-186: Increase offsets retention default to 7 days	2.0.0
147	KIP-183 - Change PreferredReplicaLeaderElectionCommand to use AdminClient	2.2.0
148	KIP-182: Reduce Streams DSL overloads and allow easier use of custom storage engines	1.0.0
149	KIP-180: Add a broker metric specifying the number of consumer group rebalances in progress	1.1.0
150	KIP-177: Consumer perf tool should count rebalance time	1.0.0
227 - Introduce Incremental FetchRequests to Increase Partition Scalability	1.1.0
145	KIP-226 - Dynamic Broker Configuration	1.1.0
146	KIP-225 - Use tags for consumer “records.lag” metrics	1.1.0
147	KIP-224: Add configuration parameter `retries` to Streams API	1.1.0
148	KIP-223 - Add per-topic min lead and per-partition lead metrics to KafkaConsumer	2.0.0
149	KIP-222 - Add Consumer Group operations to Admin API	2.0.0
150	KIP-221: Enhance DSL with Connecting Topic Creation and Repartition Hint	2.4.0 (WIP)
151	KIP-220: Add AdminClient into Kafka Streams' ClientSupplier	1.1.0
152	KIP-219 - Improve quota communication	151		2.0.0
152153	KIP-175: Additional '--describe' views for ConsumerGroupCommand218: Make KafkaFuture.Function java 8 lambda compatible	1.1.0
153154	KIP-174 - Deprecate and remove internal converter configs in WorkerConfig215: Add topic regex support for Connect sinks	1.12.0.0
154155	KIP-173214: Add prefix to StreamsConfig to enable setting default internal topic configszookeeper.max.in.flight.requests config to the broker	1.01.0
156	KIP-	1.1.0
156	KIP-168: Add GlobalTopicCount and GlobalPartitionCount metric per cluster	1.0.0
157	KIP-167: Add interface for the state store restoration process	1.0.0
158	KIP-164 - Add UnderMinIsrPartitionCount and per-partition UnderMinIsr metrics	1.0.0
159	KIP-163: Lower the Minimum Required ACL Permission of OffsetFetch	1.0.0
160	KIP-162: Enable topic deletion by default	1.0.0
161	KIP-161: streams deserialization exception handlers	1.0.0
162	KIP-160: Augment KStream.print(), KStream.writeAsText() to allow users pass in extra parameters in the printed string	1.0.0
163	KIP-157 - Add consumer config options to streams reset tool	1.0.0
164	KIP-156 Add option "dry run" to Streams application reset tool	0.11.0.0
165	KIP-155 - Add range scan for windowed state stores	0.11.0.0
166	KIP-154 Add Kafka Connect configuration properties for creating internal topics	0.11.0.0
167	KIP-153: Include only client traffic in BytesOutPerSec metric	0.11.0.0
213 Support non-key joining in KTable	2.4.0 (WIP)
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-210 - Provide for custom error handling when Kafka Streams fails to produce	1.1.0
160	KIP-208: Add SSL support to Kafka Connect REST interface	1.1.0
161	KIP-207: Offsets returned by ListOffsetsResponse should be monotonically increasing even during a partition leader change	2.2.0
162	KIP-206: Add support for UUID serialization and deserialization	2.1.0
163	KIP-205: Add all() and range() API to ReadOnlyWindowStore	1.1.0
164	KIP-204 : Adding records deletion operation to the new Admin Client API	1.1.0
165	KIP-203: Add toLowerCase support to sasl.kerberos.principal.to.local rule	1.1.0
166	KIP-202: Move merge() from StreamsBuilder to KStream	1.0.0
167	KIP-198: 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	1.0.0
169	KIP-196: Add metrics to Kafka Connect framework	168	KIP-152 - Improve diagnostics for SASL authentication failures	1.0.0
169170	KIP-151 Expose Connector type in REST API195: AdminClient.createPartitions	1.0.11.0.0
170171	KIP-150 - Kafka-Streams Cogroup	2.4.0 (WIP)	192 : Provide cleaner semantics when idempotence is enabled	1.0.0
172171	KIP-149: Enabling key access in ValueTransformer, ValueMapper, and ValueJoiner191: KafkaConsumer.subscribe() overload that takes just Pattern	1.10.0 (partially implemented) (WIP for 2.4.0)
173	KIP-190: Handle client-ids consistently between clients and brokers	1	172	KIP-146 - Classloading Isolation in Connect	0.11.0.0		KIP-145 - Expose Record Headers in Kafka Connect	1.1.0
174	KIP-144: Exponential backoff for broker reconnect attempts189: Improve principal builder interface and add support for SASL	1.0.11.0.0
175	KIP-143: Controller Health Metrics-188 - Add new metrics to support health checks	1.0.11.0.0
176	KIP-187 - 140: Add administrative RPCs for adding, deleting, and listing ACLsAdd cumulative count metric for all Kafka rate metrics	10.11.0.0
177	KIP-138: Change punctuate semantics186: Increase offsets retention default to 7 days	21.0.0
178	KIP-137: Enhance TopicCommand --describe to show topics marked for deletion183 - Change PreferredReplicaLeaderElectionCommand to use AdminClient	2.20.11.0.0
179	KIP-136: Add Listener name to SelectorMetrics tags182: Reduce Streams DSL overloads and allow easier use of custom storage engines	10.11.0.0
180	KIP-134: Delay initial consumer group rebalance180: Add a broker metric specifying the number of consumer group rebalances in progress	1.1.00.11.0.0
181	KIP-133: Describe and Alter Configs Admin APIs177: Consumer perf tool should count rebalance time	10.11.0.0
182	KIP-130: Expose states of active tasks to KafkaStreams public API176: Remove deprecated new-consumer option for tools	21.0.0
183	KIP-129: Streams Exactly-Once Semantics175: Additional '--describe' views for ConsumerGroupCommand	1.10.11.0.0
184	KIP-128: Add ByteArrayConverter for Kafka Connect174 - Deprecate and remove internal converter configs in WorkerConfig	20.11.0.0
185	KIP-126 - Allow KafkaProducer to split and resend oversized batches.173: Add prefix to StreamsConfig to enable setting default internal topic configs	10.11.0.0
186	KIP-124 - Request rate quotas171 - Extend Consumer Group Reset Offset for Stream Application	1.1.00.11.0.0
187	KIP-123: Allow per stream/table timestamp extractor168: Add GlobalTopicCount and GlobalPartitionCount metric per cluster	1.0.11.0.0
188	KIP-122167: Add Reset Consumer Group Offsets toolinginterface for the state store restoration process	10.11.0.0
189	KIP-164 - 121: Add KStream peek method Add UnderMinIsrPartitionCount and per-partition UnderMinIsr metrics	10.11.0.0
190	KIP-	163: Lower the Minimum Required ACL Permission of OffsetFetch	1.0.0
191	KIP-119: Drop Support for Scala 2.10 in Kafka 0.162: Enable topic deletion by default	1110.11.0.0
192	KIP-118: Drop Support for Java 7161: streams deserialization exception handlers	12.0.0
193	KIP-117: Add a public AdminClient API for Kafka admin operations160: Augment KStream.print(), KStream.writeAsText() to allow users pass in extra parameters in the printed string	10.11.0.0
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-112: Handle disk failure for JBOD154 Add Kafka Connect configuration properties for creating internal topics	0.111.0.0
198	KIP-	153: Include only client traffic in BytesOutPerSec metric	0.11.0	.0
199	KIP-109: Old Consumer Deprecation-152 - Improve diagnostics for SASL authentication failures	1.0.11.0.0
200	KIP-108: Create Topic Policy151 Expose Connector type in REST API	0.1011.20.0
201	KIP-107: Add deleteRecordsBefore() API in AdminClient-150 - Kafka-Streams Cogroup	2.4.0 (WIP)0.11.0.0
202	KIP-149: Enabling key access in ValueTransformer, ValueMapper, and ValueJoiner	1.1.0 (partially implemented) (WIP for 2.4.0)106 - Change Default unclean.leader.election.enabled from True to False0.11.0.0
203	KIP-105: Addition of Record Level for Sensors146 - Classloading Isolation in Connect	0. 10 11. 2 0.0
204	KIP-104: Granular Sensors for Streams 145 - Expose Record Headers in Kafka Connect	1.10.10.2.0
205	KIP-103: Separation of Internal and External traffic144: Exponential backoff for broker reconnect attempts	0.1011.20.0
206	KIP-102 - Add close with timeout for consumers143: Controller Health Metrics	0.1011.20.0
207	KIP-101 - Alter Replication Protocol to use Leader Epoch rather than High Watermark for Truncation140: Add administrative RPCs for adding, deleting, and listing ACLs	0.11.0.0
208	KIP-100 - Relax Type constraints in Kafka Streams API138: Change punctuate semantics	1.0.0.10.2.0
209	KIP-99: Add Global Tables to Kafka Streams137: Enhance TopicCommand --describe to show topics marked for deletion	0.1011.20.0
210	KIP-98 - Exactly Once Delivery and Transactional Messaging136: Add Listener name to SelectorMetrics tags	0.11.0.0
211	KIP-97: Improved Kafka Client RPC Compatibility Policy134: Delay initial consumer group rebalance	0.1011.20.0
212	KIP-96 - Add per partition metrics for in-sync and assigned replica count133: 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-93: Improve invalid timestamp handling in Kafka Streams129: Streams Exactly-Once Semantics	0.1011.20.0
215	KIP-92 - Add per partition lag metrics to KafkaConsumer128: Add ByteArrayConverter for Kafka Connect	0.1011.20.0
216	KIP-91 Provide Intuitive User Timeouts in The Producer126 - Allow KafkaProducer to split and resend oversized batches.	0.11.02.1.0
217	KIP-90 - Remove zkClient dependency from Streams124 - Request rate quotas	0.1011.20.0
218	KIP-89123: Allow sink connectors to decouple flush and offset commitper stream/table timestamp extractor	0.1011.20.0
219	KIP-88: OffsetFetch Protocol Update122: Add Reset Consumer Group Offsets tooling	0.1011.20.0
220	KIP-86: Configurable SASL callback handlers121: Add KStream peek method	0.11 2 .0.0
221	KIP-85: Dynamic JAAS configuration for Kafka clients120: Cleanup Kafka Streams builder API	1.0.0.10.2.0
222	KIP-84119: Support SASL SCRAM mechanismsDrop Support for Scala 2.10 in Kafka 0.11	0.11.00.10.2.0
223	KIP-82 - Add Record Headers118: Drop Support for Java 7	20.11.0.0
224	KIP-81: Bound Fetch memory usage in the consumer	2.4.0 (WIP)	117: Add a public AdminClient API for Kafka admin operations	0.11.0.0
225	KIP-115: Enforce offsets.topic.replication.factor upon __consumer_offsets auto topic creation	0.11.0	225	KIP-79 - ListOffsetRequest/ListOffsetResponse v1 and add timestamp search methods to the new consumer	0.10.1.0
226	KIP-78: Cluster Id114: KTable state stores and improved semantics	0.1011.10.0
227	KIP-77: Improve Kafka Streams Join Semantics113: Support replicas movement between log directories	1.10.10.2.0
228	KIP-75 - Add per-connector Converters112: Handle disk failure for JBOD	1.00.10.1.0
229	KIP-	110: Add	Codec for ZStandard Compression	2.	1.0
230	KIP-73: Replication Quotas109: Old Consumer Deprecation	0.1011.10.0
231	KIP-72: Allow putting a bound on memory consumed by Incoming request 108: Create Topic Policy	0.10.21.0.0
232	KIP-71: Enable log compaction and deletion to co-exist107: Add deleteRecordsBefore() API in AdminClient	0.1011.10.0
233	KIP -70: Revise Partition Assignment Semantics on New Consumer's Subscription Change -106 - Change Default unclean.leader.election.enabled from True to False	0.11.00.10.1.0
234	KIP-67: Queryable state for Kafka Streams105: Addition of Record Level for Sensors	0.10.12.0
235	KIP-66: Single Message Transforms for Kafka Connect104: Granular Sensors for Streams	0.10.2.0 / 0.11.0.0
236	KIP-65: Expose timestamps to Connect103: Separation of Internal and External traffic	0.10.12.0
237	KIP-63: Unify store and downstream caching in streams-102 - Add close with timeout for consumers	0.10.12.0
238	KIP-62: Allow consumer to send heartbeats from a background thread-101 - Alter Replication Protocol to use Leader Epoch rather than High Watermark for Truncation	0.1011.10.0
239	KIP-60 - Make Java client classloading more flexible100 - Relax Type constraints in Kafka Streams API	0.10.12.0
240	KIP-58 - Make Log Compaction Point Configurable99: Add Global Tables to Kafka Streams	0.10.12.0
241	KIP-57 - Interoperable LZ4 Framing98 - Exactly Once Delivery and Transactional Messaging	0.1011.0.0
242	KIP-56: Allow cross origin HTTP requests on all HTTP methods97: Improved Kafka Client RPC Compatibility Policy	0.10.02.0
243	KIP-55: Secure Quotas for Authenticated Users-96 - Add per partition metrics for in-sync and assigned replica count	0.10.12.0
244	KIP-54: Sticky Partition Assignment Strategy94 Session Windows	0.1110.02.0
245	KIP-52: Connector Control APIs93: Improve invalid timestamp handling in Kafka Streams	0.10.02.0
246	KIP-51 - List Connectors REST API92 - Add per partition lag metrics to KafkaConsumer	0.10.02.0
247	KIP-91 Provide Intuitive User Timeouts in The Producer	250 - Move Authorizer to o.a.k.common package0.10.1.0
248	KIP-48 Delegation token support for Kafka-90 - Remove zkClient dependency from Streams	0.10.21.1.0
249	KIP-45 - Standardize all client sequence interaction on j.u.Collection.89: Allow sink connectors to decouple flush and offset commit	0.10.02.0
250	KIP-43: Kafka SASL enhancements88: OffsetFetch Protocol Update	0.10.02.0
251	KIP-42: Add Producer and Consumer Interceptors86: Configurable SASL callback handlers	2.0.10.0.0
252	KIP-41: Consumer Max Records85: Dynamic JAAS configuration for Kafka clients	0.10.02.0
253	KIP-40: ListGroups and DescribeGroup84: Support SASL SCRAM mechanisms	0.910.02.0
254	KIP-38: ZooKeeper Authentication82 - Add Record Headers	0.911.0.0
255	KIP-36 - Rack aware replica assignment81: Bound Fetch memory usage in the consumer	2.4.0 (WIP)0.10.0.0
256	KIP-35 - Retrieving protocol version79 - ListOffsetRequest/ListOffsetResponse v1 and add timestamp search methods to the new consumer	0.10.01.0
257	KIP-33 - Add a time based log index78: Cluster Id	0.10.1.0
258	KIP-32 - Add timestamps to Kafka message77: Improve Kafka Streams Join Semantics	0.10.02.0
259	KIP-75 - 31 - Move to relative offsets in compressed message setsAdd per-connector Converters	0.10.01.0
260	KIP-28 - Add a processor client74: Add Fetch Response Size Limit in Bytes	0.10.01.0
261	KIP-26 - Add Kafka Connect framework for data import/export73: Replication Quotas	0.910.01.0
262	KIP-25 - System test improvements72: Allow putting a bound on memory consumed by Incoming request	1.0.9.0.0
263	KIP-22 - Expose a Partitioner interface in the new producer71: Enable log compaction and deletion to co-exist	0.910.01.0
264	KIP-21 - Dynamic Configuration70: Revise Partition Assignment Semantics on New Consumer's Subscription Change	0.910.01.0 (WIP)
265	KIP-20 Enable log preallocate to improve consume performance under windows and some old Linux file system67: Queryable state for Kafka Streams	0.10.1.00.9.0.0
266	KIP-19 - Add a request timeout to NetworkClient66: Single Message Transforms for Kafka Connect	0.10.2.0 / 0.110.9.0.0
267	KIP-16 - Automated Replica Lag Tuning65: Expose timestamps to Connect	0.910.01.0
268	KIP-15 - Add a close method with a timeout in the producer63: Unify store and downstream caching in streams	0.910.01.0
269	KIP-13 - Quota Design62: Allow consumer to send heartbeats from a background thread	0.910.01.0
270	KIP-12 - Kafka Sasl/Kerberos and SSL implementation60 - Make Java client classloading more flexible	0.910.01.0
271	KIP-11 - Kafka Authorizer design58 - Make Log Compaction Point Configurable	0.910.01.0
272	KIP-8 - Add a flush method to the producer API57 - Interoperable LZ4 Framing	0.910.0.0
273	KIP-4 - Metadata Protocol Changes56: Allow cross origin HTTP requests on all HTTP methods	0.10.0.0
274	KIP-4 - Command line and centralized administrative operations55: Secure Quotas for Authenticated Users	0.10.0.9.0.0, 0.10.0.0, 0.10.1.0
275	KIP-3 - Mirror Maker Enhancement54: Sticky Partition Assignment Strategy	0.911.0.0
276	KIP-2 - Refactor brokers to allow listening on multiple ports and IPs52: Connector Control APIs	0.910.0.0
277	KIP-1 - Remove support of request.required.acks51 - List Connectors REST API	0.910.0.0

...

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).

408 asynchronous processing to Kafka StreamsDiscussion410: Add metric for request handler thread pool utilization by request typeDiscussion416: Notify SourceTask of ACK'd offsets, metadataDiscussion

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-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-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-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	Accepted
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	438: Expose task, connector IDs in Connect API	Discussion
KIP-439: Cleanup built-in Store interfaces	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 timestamp441: Smooth Scaling Out for Kafka Streams	Discussion
KIP-398: Support reading trust store from classpath444: Augment metrics for Kafka Streams	Discussion
KIP-399: Extend ProductionExceptionHandler to cover serialization exceptions447: Producer scalability for exactly once semantics	Discussion
KIP-400: Improve exit status in case of errors in ConsoleProducer448: Add State Stores Unit Test Support to Kafka Streams Test Utils	Discussion
KIP-401: TransformerSupplier/ProcessorSupplier StateStore connecting450: Sliding Window Aggregations in the DSL	DiscussionVoting in progress
KIP-403: Increase ProducerPerformance precision by using nanoTime452: Tool to view cluster status	Discussion, JIRA existsDraft
KIP-405457: Kafka Tiered StorageAdd DISCONNECTED status to Kafka Streams	Discussion Discussion
KIP-406: GlobalStreamThread should honor custom offset policy.459: Improve KafkaStreams#close	Discussion
KIP-407: Kafka Connect support override worker kafka api configuration with connector configuration that post by rest api463: 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-409: Allow creating under-replicated topics and partitions468: 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-418477: 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: Cleanup built-in Store interfaces	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-459: Improve KafkaStreams#close	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	Under discussion
KIP-471: Expose RocksDB Metrics in Kafka Streams	Under discussion
KIP-472: Add header to RecordContext/ProducerRecord	Under Discussion
KIP-466: Add support for List<T> serialization and deserialization	Under Discussion
KIP-473: Enable KafkaLog4JAppender to use SASL Authentication Callback Handlers	Under Discussion
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	KIP-474: To deprecate WindowStore#put(key, value)	Under 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