Error when access repository: ForwardChainingRDFSInferencerFactory not found

[reckart]

Current Behavior

When trying to create a new repository, I get an error that is ForwardChainingRDFSInferencerFactory not found:

2023-12-12 12:57:43 ERROR SailRegistry - Failed to instantiate service
java.util.ServiceConfigurationError: org.eclipse.rdf4j.sail.config.SailFactory: Provider org.eclipse.rdf4j.sail.inferencer.fc.config.ForwardChainingRDFSInferencerFactory not found
	at java.base/java.util.ServiceLoader.fail(ServiceLoader.java:593) ~[?:?]
	at java.base/java.util.ServiceLoader$LazyClassPathLookupIterator.nextProviderClass(ServiceLoader.java:1219) ~[?:?]
	at java.base/java.util.ServiceLoader$LazyClassPathLookupIterator.hasNextService(ServiceLoader.java:1228) ~[?:?]
	at java.base/java.util.ServiceLoader$LazyClassPathLookupIterator.hasNext(ServiceLoader.java:1273) ~[?:?]
	at java.base/java.util.ServiceLoader$2.hasNext(ServiceLoader.java:1309) ~[?:?]
	at java.base/java.util.ServiceLoader$3.hasNext(ServiceLoader.java:1393) ~[?:?]
	at org.eclipse.rdf4j.common.lang.service.ServiceRegistry.<init>(ServiceRegistry.java:44) ~[rdf4j-common-io-5.0.0-M2.jar:5.0.0-M2]
	at org.eclipse.rdf4j.sail.config.SailRegistry.<init>(SailRegistry.java:40) ~[rdf4j-sail-api-5.0.0-M2.jar:5.0.0-M2]
	at org.eclipse.rdf4j.sail.config.SailRegistry$SailRegistryHolder.<clinit>(SailRegistry.java:27) ~[rdf4j-sail-api-5.0.0-M2.jar:5.0.0-M2]
	at org.eclipse.rdf4j.sail.config.SailRegistry.getInstance(SailRegistry.java:36) ~[rdf4j-sail-api-5.0.0-M2.jar:5.0.0-M2]
	at org.eclipse.rdf4j.repository.sail.config.SailRepositoryConfig.lambda$parse$1(SailRepositoryConfig.java:103) ~[rdf4j-repository-sail-5.0.0-M2.jar:5.0.0-M2]
	at java.base/java.util.Optional.ifPresent(Optional.java:178) ~[?:?]
	at org.eclipse.rdf4j.repository.sail.config.SailRepositoryConfig.parse(SailRepositoryConfig.java:102) ~[rdf4j-repository-sail-5.0.0-M2.jar:5.0.0-M2]
	at org.eclipse.rdf4j.repository.config.AbstractRepositoryImplConfig.create(AbstractRepositoryImplConfig.java:118) ~[rdf4j-repository-api-5.0.0-M2.jar:5.0.0-M2]
	at org.eclipse.rdf4j.repository.config.RepositoryConfig.lambda$parse$2(RepositoryConfig.java:185) ~[rdf4j-repository-api-5.0.0-M2.jar:5.0.0-M2]
	at java.base/java.util.Optional.ifPresent(Optional.java:178) ~[?:?]
	at org.eclipse.rdf4j.repository.config.RepositoryConfig.parse(RepositoryConfig.java:185) ~[rdf4j-repository-api-5.0.0-M2.jar:5.0.0-M2]
	at org.eclipse.rdf4j.repository.config.RepositoryConfig.create(RepositoryConfig.java:201) ~[rdf4j-repository-api-5.0.0-M2.jar:5.0.0-M2]
	at org.eclipse.rdf4j.repository.config.RepositoryConfigUtil.getRepositoryConfig(RepositoryConfigUtil.java:46) ~[rdf4j-repository-api-5.0.0-M2.jar:5.0.0-M2]
	at org.eclipse.rdf4j.repository.manager.LocalRepositoryManager.getRepositoryConfig(LocalRepositoryManager.java:278) ~[rdf4j-repository-manager-5.0.0-M2.jar:5.0.0-M2]
	at org.eclipse.rdf4j.repository.manager.LocalRepositoryManager.createRepository(LocalRepositoryManager.java:207) ~[rdf4j-repository-manager-5.0.0-M2.jar:5.0.0-M2]
	at org.eclipse.rdf4j.repository.manager.RepositoryManager.getRepository(RepositoryManager.java:326) ~[rdf4j-repository-manager-5.0.0-M2.jar:5.0.0-M2]

However, it is referenced in a service loader configuration file located in a dependency that I use rdf4j-sail-inferencer-5.0.0-M2.jar.

It seems this class may have been removed in 5.0.0-M2 because I don't find it in rdf4j-sail-inferencer-5.0.0-M2.jar?

It seems to have been in that module in the past according to code search: https://github.com/search?q=repo%3Aeclipse-rdf4j%2Frdf4j+ForwardChainingRDFSInferencerFactory&type=code

Expected Behavior

Service loaders should not reference non-existing factory classes or classes in other JARs.

Steps To Reproduce

No response

Version

5.0.0-M2

Are you interested in contributing a solution yourself?

None

Anything else?

No response

[hmottestad]

Yes, that's been removed. It's been deprecated for a long time already in favour of the SchemaCachingRDFSInferencer.

Could you try swapping to the SchemaCachingRDFSInferencer and let us know if that works for you?

[reckart]

I don't need the class at all.

But because it is referenced in core/sail/inferencer/src/main/resources/META-INF/services/org.eclipse.rdf4j.sail.config.SailFactory the library logs an error when it internally invokes the service loader mechanism. The line must be removed from the service loader config file.

[hmottestad]

Ahh. I see. I guess I didn't do as good of a job of removing the class as I had thought. I'll take another look.

Is it only logging an error, or is it not able to create the repo?

[reckart]

It happens during a test and my test ends up green, so I guess it's only logging the error but not failing hard.