about storm tuple

[hjh]

Hi, I am new to storm and I met a problem with tuple. In the local mode 
does tuple between connected bolts share the same object? For example 
BoltA emit a tuple to BoltB. If BoltB is processing the tuple (this 
tuple is assigned to a private variable, say VAR, in BoltB) and at the 
same time BoltA sends another tuple to BoltB, then VAR changed 
immediately. Does that mean in local mode BoltA and BoltB share the same 
tuple instance?? And how to deal with such situation?

PS. I use java.
Any suggestion is warmly welcomed


Thank you very much!!!