VMware critical notification alarm

The title looks scared, is it? Actually I don't want to talk about any problem of VMware product but just a feature. 标题看起来吓人吧?其实这次打算只谈谈功能。 I noticed an alarm "VMware critical notification alarm" on my vCenter Server today, I never saw this before vCenter Server 5.5 U1. I did some research on internet but nothing. I'm not…