eXo JCR supports J2EE Connector Architecture 1.5, thus If you would like to delegate the JCR Session lifecycle to your application server, you can use the JCA Resource Adapter for eXo JCR if your application server supports JCA 1.5. This adapter only supports XA Transaction, in other words you cannot use it for local transactions. Since the JCR Sessions have not been designed to be shareable, the session pooling is simply not covered by the adapter.