Source-backed version compatibility
Apache Kafka Java version compatibility. Apache Kafka 4.3 fully supports Java 17, Java 21, and Java 25 across its modules.
Quick answer
Documented Java versions
Apache Kafka 4.3 fully supports Java 17, Java 21, and Java 25 across its modules.
Java versions newer than the most recent LTS release receive only best-effort support and are not modeled.
high confidence · verified 2026-07-23 · broker, Connect, and command-line tools runtime
Documented Java versions
Apache Kafka 4.2 fully supports Java 17, Java 21, and Java 25 across its modules.
Java versions newer than the most recent LTS release receive only best-effort support and are not modeled.
high confidence · verified 2026-07-23 · broker, Connect, and command-line tools runtime
Documented Java versions
Apache Kafka 4.1 fully supports Java 17 and Java 21 across its modules.
Java versions newer than the most recent LTS release receive only best-effort support and are not modeled.
high confidence · verified 2026-07-23 · broker, Connect, and command-line tools runtime
Documented Java versions
Apache Kafka 4.0 fully supports Java 17 and Java 21 across its modules.
Java versions newer than the most recent LTS release receive only best-effort support and are not modeled.
high confidence · verified 2026-07-23 · broker, Connect, and command-line tools runtime
Primary evidence
Every range above is backed by upstream documentation, tagged source, release notes, or another project-owned primary source.
compatibility.fyi