The hibernate.search.autoregister_listeners property was set to _false _by default in [ConfigurationFactory] (https://github.com/jbosstools/jbosstools-hibernate/blob/12928b28d3769b2662b838b5f75f7bca51e0c6c9/plugins/org.hibernate.eclipse/src/org/hibernate/console/ConfigurationFactory.java#L128), if not set to true by use in xml configuration.
The reason is descibed in the comments some lines above. I also linked the appropriate JIRAs.

The idea is to set this property to _true _, because in order to use the curently being created [hibernate-search plugin] (https://github.com/bdshadow/org.jboss.tools.hibernate.search) the user has to set it to true in the configuration, while this property isn't obligatory by default.