Hibernate saveOrUpdate行为(Hibernate saveOrUpdate behavior)

 在保存映像之前，将执行已注册的关闭操作。 这意味着源文件已关闭，Web服务器将关闭。 保存映像后，它会执行启动操作，这通常会再次启动Web服务器。 根据服务器实现，可能会关闭打开的连接。 
 
 这意味着您在保存图像时无法接受新连接，并且可能会暂时挂起或关闭打开的连接。 对于这两个问题，（至少）有两个简单的解决方法： 
 
 
 
 在保存之前使用OSProcess分割图像（DabbleDB，CmsBox）。 
 
 
 使用多个映像和负载平衡器，以便在保存之前可以从活动服务器中一次删除一个映像。 
 

Before an image is saved registered shutdown actions are executed. This means source files are closed and web servers are shut down. After the image is saved it executes the startup actions, which typically bring up the web-server again. Depending on the server implementation open connections might be closed.
 
This means that you cannot accept new connections while you save an image and open connections might be temporarily suspended or closed. For both issues there are (at least) two easy workarounds:
 
 
 
Fork the image using OSProcess before you save it (DabbleDB, CmsBox).
 
 
Use multiple images and a load balancer so that you can remove images one at a time from the active servers before saving them.