hibernateProperties.put("hibernate.search.backend.signature.host", "http://127.0.0.1:9200");
hibernateProperties.put("hibernate.search.backends.signature.type", "elasticsearch");
hibernateProperties.put("hibernate.search.default_backend", "signature");

Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory' defined in class path resource [com/fiducial/signature/configuration/HibernateConfiguration.class]: Invocation of init method failed; nested exception is org.hibernate.search.util.common.SearchException: HSEARCH000520: Hibernate Search bootstrap failed. Failures:

    Hibernate ORM mapping: 
        type 'com.allegoria.notariat.business.Courriel': 
            index 'com.allegoria.notariat.business.Courriel': 
                failures: 
                  - HSEARCH000501: Unable to convert configuration property 'hibernate.search.backends.signature.type' with value 'elasticsearch': No qualifying bean of type 'org.hibernate.search.engine.backend.spi.BackendFactory' available
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1744)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:576)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:498)
	at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318)
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199)
	at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:273)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1241)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1168)
	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:595)
	... 101 common frames omitted