我的应用基于Play！ Framework + PostgreSQL。 当我循环访问从数据库中检索到的对象列表时，我无法摆脱这种乐观的锁定异常。
175 List<SocialAction> friendAction = SocialAction.findSocialActionsWithFieldFriendIdAndInterest
176 (interest, user);
177
178 for (SocialAction action : friendAction) {
179 action.delete();
180 }
181
182 socialInterest.delete();
浏览器中的例外：
Execution exception
[OptimisticLockException: Data has changed. updated [0] rows sql[delete from social_action where id=? and date=? and suggest_comment=? and social_interest_id=? and origin_socialaction_id=? and activity_id=? and friend_id=?] bind[null]]
In /Users/aaaaa/Documents/aaaaa-remote/app/models/SocialInterest.java at line 179.
在终端
play.core.ActionInvoker$$anonfun$receive$1$$anon$1: Execution exception [[OptimisticLockException: Data has changed. updated [0] rows sql[delete from social_action where id=? and date is null and suggest_comment is null and social_interest_id is null and origin_socialaction_id is null and activity_id is null and friend_id is null] bind[null]]]
at play.core.ActionInvoker$$anonfun$receive$1.apply(Invoker.scala:134) [play_2.9.1.jar:2.0.4]
at play.core.ActionInvoker$$anonfun$receive$1.apply(Invoker.scala:115) [play_2.9.1.jar:2.0.4]
at akka.actor.Actor$class.apply(Actor.scala:318) [akka-actor.jar:2.0.2]
at play.core.ActionInvoker.apply(Invoker.scala:113) [play_2.9.1.jar:2.0.4]
at akka.actor.ActorCell.invoke(ActorCell.scala:626) [akka-actor.jar:2.0.2]
at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:197) [akka-actor.jar:2.0.2]
Caused by: javax.persistence.OptimisticLockException: Data has changed. updated [0] rows sql[delete from social_action where id=? and date is null and suggest_comment is null and social_interest_id is null and origin_socialaction_id is null and activity_id is null and friend_id is null] bind[null]
at com.avaje.ebeaninternal.server.persist.dml.DmlHandler.checkRowCount(DmlHandler.java:123) ~[ebean.jar:na]
at com.avaje.ebeaninternal.server.persist.dml.DeleteHandler.execute(DeleteHandler.java:81) ~[ebean.jar:na]
at com.avaje.ebeaninternal.server.persist.dml.DmlBeanPersister.execute(DmlBeanPersister.java:105) ~[ebean.jar:na]
at com.avaje.ebeaninternal.server.persist.dml.DmlBeanPersister.delete(DmlBeanPersister.java:67) ~[ebean.jar:na]
at com.avaje.ebeaninternal.server.persist.DefaultPersistExecute.executeDeleteBean(DefaultPersistExecute.java:128) ~[ebean.jar:na]
at com.avaje.ebeaninternal.server.core.PersistRequestBean.executeNow(PersistRequestBean.java:535) ~[ebean.jar:na]
在此代码之前调用的方法中，似乎先前已从DB中删除了该行。 但是当我调用findSocialActions（）时，它不应该出现在列表中。所以不会有例外。
你有什么想法吗？
感谢。