What could cause a crashing JRE (SYNC-4557)?
A crashing JRE can have all sorts of causes, googling might be the most effective approach trying to solve this problem. A common cause is memory problems, investigating using industry standard tools might provide you with detailed information. A particular customer had crashing sync’s due to running those in parallel (SYNC-4557). Note: a crashing or early termination of the JRE results in a traceback at the moment (SYNC-4564), which might not reveal this problem immediate. If a synchronization crashes with the following traceback, it will most likely be a crashing JRE.