The Apache Airflow Java SDK — author and run Airflow task implementations in JVM languages.
Which Airflow TaskInstance states and capabilities the Java SDK currently supports. The normative meaning of each dimension is defined in the Language SDK conformance specification.
Min. Airflow version: 3.3 · supervisor schema: 2026-06-16
| Dimension | Tier | Supported | Since | Notes |
|---|---|---|---|---|
| TaskInstance states | ||||
state: success | MUST | ✓ | 3.3 | |
state: failed | MUST | ✓ | 3.3 | |
state: up_for_retry | MUST | ✓ | 3.3 | RetryTask |
state: skipped | SHOULD | ✗ | – | runtime does not emit TaskState skipped yet |
state: deferred | MAY | ✗ | – | runtime does not emit DeferTask yet |
state: up_for_reschedule | MAY | ✗ | – | runtime does not emit RescheduleTask yet |
state: awaiting_input | MAY | ✗ | – | runtime does not emit AwaitInputTask yet |
state: removed | MAY | ✓ | 3.3 | |
| Runtime capabilities | ||||
capability: mixed-lang-stub-target | MUST | ✓ | 3.3 | @task.stub |
capability: task-logging | MUST | ✓ | 3.3 | SLF4J + JPL bridged to the task log |
capability: xcom-read-write | MUST | ✓ | 3.3 | |
capability: connection-read | MUST | ✓ | 3.3 | |
capability: variable-read-write | MUST | ✗ | – | getVariable only; no write over the comm socket yet |
capability: self-contained-bundle | MUST | ✓ | 3.3 | Airflow metadata embedded in the jar artifact |
capability: retry-policy | MAY | ✗ | – | no task-facing retry-policy API yet |
capability: task-state-store | MAY | ✗ | – | no task-facing state-store API yet |
capability: asset-state-store | MAY | ✗ | – | no task-facing state-store API yet |
capability: asset-event-emit | MAY | ✗ | – | runtime does not emit asset events yet |
capability: asset-event-read | MAY | ✗ | – | no task-facing asset-event API yet |
| Native-Dag authoring | ||||
capability: native-dag-authoring | SHOULD | ✗ | – | native Dag authoring not implemented yet |
capability: task-args | MUST † | n/a | – | |
capability: dag-params | MUST † | n/a | – | |
capability: taskflow-dependencies | MUST † | n/a | – | |
capability: branching | SHOULD † | n/a | – | |
capability: dag-test | SHOULD † | n/a | – | |
capability: task-group | MAY † | n/a | – | |
capability: dynamic-task-mapping | MAY † | n/a | – | |
capability: asset-inlets-outlets | MAY † | n/a | – | |
capability: asset-scheduling | MAY † | n/a | – | |
capability: object-store | MAY † | n/a | – |
Marks: ✓ supported · ✗ not supported · n/a not applicable. A tier marked † applies only when native-dag-authoring is supported.