Hit by Rien:
java.util.ConcurrentModificationException at java.util.LinkedHashMap $LinkedHashIterator.nextEntry(LinkedHashMap.java:390) at java.util.LinkedHashMap $ValueIterator.next(LinkedHashMap.java:405) at com.avaje.ebeaninternal.server.querydefn.OrmQueryDetail.removeSecondaryQueries(OrmQueryDetail.java: 194) at com.avaje.ebeaninternal.server.querydefn.OrmQueryDetail.removeSecondaryQueries(OrmQueryDetail.java: 149) at com.avaje.ebeaninternal.server.querydefn.DefaultOrmQuery.removeQueryJoins(DefaultOrmQuery.java: 336) at com.avaje.ebeaninternal.server.loadcontext.DLoadContext.registerSecondaryQueries(DLoadContext.java: 137) at com.avaje.ebeaninternal.server.core.OrmQueryRequest.(OrmQueryRequest.java: 112) at com.avaje.ebeaninternal.server.core.DefaultServer.createQueryRequest(DefaultServer.java: 1142) at com.avaje.ebeaninternal.server.core.DefaultServer.findList(DefaultServer.java: 1389) at com.avaje.ebeaninternal.server.querydefn.DefaultOrmQuery.findList(DefaultOrmQuery.java: 896)
Fix in HEAD. Copy the OrmQueryDetail ... so as not to share instances when using Autofetch tuned queries.