Non-compatible Mode

This is an additional feature of SmallRye Fault Tolerance and is not specified by MicroProfile Fault Tolerance.

SmallRye Fault Tolerance offers a mode where certain features are improved beyond specification, as described below. This mode is not compatible with the MicroProfile Fault Tolerance specification (and doesn’t necessarily pass the entire TCK).

This mode is disabled by default. To enable, set the configuration property smallrye.faulttolerance.mp-compatibility to false.

Quarkus

In Quarkus, the non-compatible mode is enabled by default. To restore compatibility, add the following to your application.properties:

smallrye.faulttolerance.mp-compatibility=true

Note that the non-compatible mode is available since SmallRye Fault Tolerance 5.2.0 and Quarkus 2.1.0.Final. Previous versions are always compatible.

Improvements

The improvements enabled in the non-compatible mode are:

Determining asynchrony from method signatures
Inspecting exception cause chains
- in fallback
- in circuit breaker
- in retry
Fallback methods with exception parameter