RIM Outage Causes

Like so many IT problems, the best laid plans are brought low by poor change management

clipped from news.com.com Ruling out those causes, the company has "determined that the incident was triggered by the introduction of a new, non-critical system routine that was designed to provide better optimization of the system's cache." In computing terms, a cache is a temporary storage area for that allows data to be served up quickly. RIM said the "system routine" was not expected to impact the regular operations of the BlackBerry servers and infrastructure. But despite previous testing, the new system routine produced an unexpected impact that set off a chain reaction triggering a series of interaction errors between the system's operational database and the cache.