Missing native-image reflection hint for org.springframework.data.mongodb.core.aggregation.AggregationOperation

[anguzo]

Missing native-image reflection hint for org.springframework.data.mongodb.core.aggregation.AggregationOperation

[anguzo]

Sure, here is a minimal example. If I remove mongodb from dependencies then project does not throw the mentioned exception when running native executable.

demo.zip

[christophstrobl]

Thank you @anguzo for the reproducer - GraalVM decides to not include AggregationOperation in the image. However the core framework tries to inspect all methods when creating a proxy for the mongo template. This involves reading method signatures via BridgeMethodResolver and fails because of the removed AggregationOperation.
@sdeleuze is there a way BridgeMethodResolver could be more lenient when resolving parameter types?

[snicoll]

Sorry, I overlooked this. I'll check with Christoph.

[christophstrobl]

If you'd like us to spend some time investigating, please take the time to provide a complete minimal sample (something that we can unzip or git clone, build, and deploy) that reproduces the problem.

[sdeleuze]

Spring Framework is unlikely to change this code path which could introduce regressions on JVM side. I would suggest to add related hints on Spring Data side (and maybe check if other *Operation types are impacted, included outside spring-data-mongodb).

[christophstrobl]

Given the number of projects potentially having both reactive and imperative variants manually adding those hints sounds quite cumbersome and error prone. Before we do that, do we know candidates for proxy creation during the AOT phase? If so, we could hook into the processing to add missing types based on method signatures.

[sdeleuze]

@snicoll Could you please share with Christoph if that's possible (I am not sure it is)?

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