If delta processing is disabled for efficiency reasons (org.nuxeo.core.delta.disabled=true), there is a crash at startup:
ERROR [OSGiAdapter] Error during Framework Listener execution : class org.nuxeo.runtime.osgi.OSGiRuntimeService java.lang.ClassCastException: org.nuxeo.ecm.core.api.model.DeltaLong cannot be cast to java.lang.Long at org.nuxeo.ecm.core.storage.dbs.DBSTransactionState.save(DBSTransactionState.java:621) at org.nuxeo.ecm.core.storage.dbs.DBSSession.save(DBSSession.java:215) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.nuxeo.ecm.core.storage.dbs.DBSRepositoryBase$DBSSessionInvoker.invoke(DBSRepositoryBase.java:487) at com.sun.proxy.$Proxy65.save(Unknown Source) at org.nuxeo.ecm.core.api.AbstractSession.save(AbstractSession.java:1485) at org.nuxeo.ecm.platform.content.template.listener.RepositoryInitializationListener.doInitializeRepository(RepositoryInitializationListener.java:41) at org.nuxeo.ecm.core.repository.RepositoryInitializationHandler.initializeRepository(RepositoryInitializationHandler.java:93) at org.nuxeo.ecm.core.repository.RepositoryInitializationHandler.initializeRepository(RepositoryInitializationHandler.java:91) at org.nuxeo.ecm.core.repository.RepositoryService$2.run(RepositoryService.java:140) at org.nuxeo.ecm.core.api.UnrestrictedSessionRunner.runUnrestricted(UnrestrictedSessionRunner.java:131) at org.nuxeo.ecm.core.repository.RepositoryService.initializeRepository(RepositoryService.java:142) at org.nuxeo.ecm.core.repository.RepositoryService.doInitRepositories(RepositoryService.java:124)