Yoann Rodière ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) *commented* on HSEARCH-3900 ( https://hibernate.atlassian.net/browse/HSEARCH-3900?atlOrigin=eyJpIjoiMTY... ) Re: drop-and-create strategy is not working at app. startup when "hibernate.search.autoregister_listeners" is set to false. And if true, startup index creation thread are not released, sending the app in out of memory. ( https://hibernate.atlassian.net/browse/HSEARCH-3900?atlOrigin=eyJpIjoiMTY... ) That's not what your stacktraces tells me. You probably forgot to set the index manager type to "elasticsearch" for at least one of your indexes: # Do this to make it the default for all indexes hibernate.search. default.indexmanager = elasticsearch # Do this to use Elasticsearch for one index in particular hibernate.search.myIndex1.indexmanager = elasticsearch These are the threads that perform indexing. The threads will not stop as long as your application is running. That's on purpose. The threads run intermittently when you index something. That's on purpose. Was your only problem that "Hibernate Search creates threads"? ( https://hibernate.atlassian.net/browse/HSEARCH-3900#add-comment?atlOrigin... ) Add Comment ( https://hibernate.atlassian.net/browse/HSEARCH-3900#add-comment?atlOrigin... ) Get Jira notifications on your phone! Download the Jira Cloud app for Android ( https://play.google.com/store/apps/details?id=com.atlassian.android.jira.... ) or iOS ( https://itunes.apple.com/app/apple-store/id1006972087?pt=696495&ct=Em... ) This message was sent by Atlassian Jira (v1001.0.0-SNAPSHOT#100125- sha1:29f7b81 )