When does a SEAM conversation end?

[knice147]

Suppose some invokes the action tied to a @Begin annotation and they never perform the action tied to the @End annotation.  At what point does the conversation end?  Also, suppose they perform the @Begin annotation a second time before the @End is called.  Would it start a new conversation or overwrite the previous one?

[norman]

The conversation would eventually time out. 

For your other question, please see the Seam documentation for @Begin usage, specifically the join attribute.