The second problem is more serious and should be of concern to anyone who's read Editing the Web: Detecting the LostUpdate problem Using Unreserved Checkout.
第二个问题就更严重,需要关心谁阅读了可编辑Web:通过无条件的签出来检查丢失更新的问题。
2
With some unlucky timing, an update could be lost.
如果计时失误,有一个更新可能会丢失。
3
That is, if concurrent transactions update an entity bean with same primary key, updates could get lost.