Hi,

> Under a multithreaded environment, if this method is called by one
> thread and then concurrently, another method tries to do xidMap.put
> (xid,tr) , say from getCurrentIscTrHandle(...,...) , that j.remove()
> could possibly throw ConcurrentModificationException. Correct me if
> i'm wrong.

Yes, this might happen. I will add appropriate synchronization.

Roman