Infinite loop when serializing to JSON

[metacosm]

Describe the bug

Upgrading to 3.35 causes an infinite loop in the Jackson serialization stack.
Note that setting quarkus.rest.jackson.optimization.enable-reflection-free-serializers=false fixes the issue.

Expected behavior

Serialization to happen correctly.

Actual behavior

Infinite loop

How to Reproduce?

1. Clone https://github.com/metacosm/power-server
2. Change Quarkus version to 3.35
3. Build with mvn clean install
4. Issue occurs on macOS, Linux seems OK because the object tree is different there

Output of uname -a or ver

No response

Output of java -version

No response

Quarkus version or git rev

No response

Build tool (ie. output of mvnw --version or gradlew --version)

No response

Additional information

No response

[quarkus-bot]

/cc @gsmet (jackson), @mariofusco (jackson)

[metacosm]

Reproducer: https://github.com/metacosm/quarkus-53848. Running the GreetingResourceTest unit test should lead to a 500 error with the Jackson serialization infinite loop.

[geoand]

Thanks a lot @metacosm!

[mariofusco]

I reproduced and find the culprit of this. The SensorUnit has a quite weird recursive structure. Of course the serialization has to work even with situations like this and I will try to fix it, I'm just reporting it in case you may want to review that odd data structure.

[metacosm]

I reproduced and find the culprit of this. The SensorUnit has a quite weird recursive structure. Of course the serialization has to work even with situations like this and I will try to fix it, I'm just reporting it in case you may want to review that odd data structure.

Thanks, it would indeed make sense to set the base to null when the unit is itself a base.

[mariofusco]

Thanks, it would indeed make sense to set the base to null when the unit is itself a base.

Imo it would make even more sense to have a BaseSensorUnit type without the base attribute and a SensorUnit extending BaseSensorUnit adding the base attribute only there.