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Basic client compatibility:
- Java: clients <= 0.10.0 or >= 0.10.2
- KIP-35 enabled clients: any version
Kafka Streams: version 0.10.0
- Versions >= 0.10.2 1 not supported because they require CreateTopics support introduced in 0.10.1
Kafka Connect: versions <= 0.10.0 or >= 0.10.2
Features that newer clients might notice missing:
- AdminClient requests
  - Topics
  - ACLs
  - Configs
    - describeConfigs
    - alterConfigs
  - Log Dirs

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Basic client compatibility:
- Java: any version
- KIP-35 enabled clients: any version
Kafka Streams:
- versions < 0.11.0,and
- versions >= 0.11.0.x, 2.0 with EOS turned onand versions >= 2.0 without message headers.x, 2.1.0, 2.1.1, and 2.2.0
  - with EOS turned off
  - without message headers
  - note: since version 2.0, message format 0.10+ is required
- versions 2.1.2, 2.2.1, 2.3.0 and newer are not supported (because they use headers internally, which require broker 0.11.0 and message format 0.11))
Kafka Connect: versions <= 0.10.1
Features that newer clients might notice missing:
- AdminClient
  - Topics
    - createPartitions
  - ACLs
  - Configs
    - describeConfigs
    - alterConfigs
  - Log Dirs

...

Basic client compatibility:
- Java: any version
- KIP-35 enabled clients: any version
Kafka Streams:
- versions < 0.11.0,and
- versions >= 0.11.0 with EOS turned onand versions >= 2.0 without message headers.x, 2.0.x, 2.1.0, 2.1.1, and 2.2.0
  - with EOS turned off
  - without message headers
  - note: since version 2.0, message format 0.10+ is required
- versions 2.1.2, 2.2.1, 2.3.0 and newer are not supported (because they use headers internally that require broker 0.11.0 and message format 0.11)
Kafka Connect: any version
Features that newer clients might notice missing:
- AdminClient
  - Topics
    - createPartitions
  - ACLs
  - Configs
    - describeConfigs
    - alterConfigs
  - Log Dirs

...

Basic client compatibility:
- Java: any version
- KIP-35 enabled clients: any version
Kafka Streams: any version
- note: since version 2.0, message format 0.10+ is required
- note: since version 2.0, if message headers are used, message format 0.11+ is required
- note, since 2.1.2, 2.2.1, and 2.3.0 message format 0.11+ is required
Kafka Connect: any version
Features that newer clients might notice missing:
- Topics:
  - createPartitions
- Log Dirs

...

Basic client compatibility:
- Java: any version
- KIP-35 enabled clients: any version
Kafka Streams: any version
- note: since version 2.0, message format 0.10+ is required
- note: since version 2.0, if message headers are used, message format 0.11+ is required
- note, since 2.1.2, 2.2.1, and 2.3.0 message format 0.11+ is required
Kafka Connect: any version
Features that newer clients might notice missing:

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