Can this Java singleton get rebuilt repeatedly in WebSphere 6?

Question

I\'m trying to track down an issue in our system and the following code worries me. The following occurs in our doPost() method in the primary servlet (names have been changed

Answer 1

In theory it will be built only once. However, this pattern breaks in various application servers, where you can get multiple instances of 'singleton' classes (since they are not thread-safe).

Also, the singleton pattern has been critized a lot. See for instance Singleton I love you, but you're bringing me down