hibernate/hibernate-orm · error · ServiceException

Unable to call constructor of RegionFactory impl [

Error message

Unable to call constructor of RegionFactory impl [

What it means

Error "Unable to call constructor of RegionFactory impl [" thrown in hibernate/hibernate-orm.

Source

Thrown at hibernate-core/src/main/java/org/hibernate/cache/internal/StrategyCreatorRegionFactoryImpl.java:45

	public RegionFactory create(Class<? extends RegionFactory> strategyClass) {
		assert RegionFactory.class.isAssignableFrom( strategyClass );

		// first look for a constructor accepting Properties
		final var regionFactoryWithProperties = instantiateWithProperties( strategyClass, Properties.class );
		if ( regionFactoryWithProperties != null ) {
			return regionFactoryWithProperties;
		}
		// next try Map
		final var regionFactoryWithMap = instantiateWithProperties( strategyClass, Map.class );
		if ( regionFactoryWithMap != null ) {
			return regionFactoryWithMap;
		}
		// finally try no-arg
		try {
			return strategyClass.newInstance();
		}
		catch (IllegalAccessException | InstantiationException e) {
			throw new ServiceException( "Unable to call constructor of RegionFactory impl [" + strategyClass.getName() + "]", e );
		}
	}

	private RegionFactory instantiateWithProperties(Class<? extends RegionFactory> strategyClass, Class<?> propertiesClass) {
		try {
			return strategyClass.getConstructor( propertiesClass ).newInstance( properties );
		}
		catch ( NoSuchMethodException e ) {
			return null;
		}
		catch (IllegalAccessException | InstantiationException | InvocationTargetException e) {
			throw new ServiceException( "Unable to call constructor of RegionFactory impl [" + strategyClass.getName() + "]", e );
		}
	}
}

View on GitHub (pinned to fad1729dce)

Solutions

1. Give the RegionFactory implementation a public no-arg (or (Properties)) constructor and inspect the wrapped cause.

Example fix

Give the RegionFactory implementation a public no-arg (or (Properties)) constructor and inspect the wrapped cause.

When it happens

Trigger: Second-level caching is misconfigured or a cache region/key does not match what Hibernate expects.

Common situations: Enabling @Cacheable entities without setting hibernate.cache.region.factory_class, custom RegionFactory implementations, or unwrapping Cache to provider types.

AI-assisted analysis of hibernate/hibernate-orm@fad1729dce (2026-08-22). Data as JSON: /api/errors/86c49dd92c8b822f. Report an issue: GitHub.