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ClassCastException during scan when classgraph is shaded

See original GitHub issue

This seems to be related to scanning modules but I don’t have any experience with them so I am at a bit of a loss of what the correct solution might entail. In a nutshell there are two orbit modules which shade classgraph to different packages, then when scanning a class cast exception is thrown as seen below.

Caused by: java.lang.ClassCastException: class cloud.orbit.runtime.shaded.io.github.classgraph.ModuleRef cannot be cast to class cloud.orbit.core.shaded.io.github.classgraph.ModuleRef (cloud.orbit.runtime.shaded.io.github.classgraph.ModuleRef and cloud.orbit.core.shaded.io.github.classgraph.ModuleRef are in unnamed module of loader 'app')
 at cloud.orbit.core.shaded.io.github.classgraph.Scanner.<init>(Scanner.java:169)
 at cloud.orbit.core.shaded.io.github.classgraph.ClassGraph.scanAsync(ClassGraph.java:1125)
 at cloud.orbit.core.shaded.io.github.classgraph.ClassGraph.scan(ClassGraph.java:1161)
 at cloud.orbit.core.shaded.io.github.classgraph.ClassGraph.scan(ClassGraph.java:1201)
 at cloud.orbit.core.shaded.io.github.classgraph.ClassGraph.scan(ClassGraph.java:1214)
 at cloud.orbit.actors.runtime.ClassPathSearch.<init>(ClassPathSearch.java:123)

Issue Analytics

State:
Created 4 years ago
Comments:12 (12 by maintainers)

Top GitHub Comments

2reactions

johnoucommented, Jun 20, 2019

@lukehutch sorry for the smoke, hope you don’t mind that I created a small wiki page in an effort to help others who may need to shade ClassGraph.

https://github.com/classgraph/classgraph/wiki/Shading-ClassGraph

0reactions

lukehutchcommented, Jun 20, 2019

Great, thanks for the contribution! I’ll link that page from the build instructions.

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