Mastering Hadoop 3

Out-of-order events

This is one of the most important issues with any unbound data stream. Sometimes, an event comes so late that, after that, out-of-order events are first processed. Different distant, discrete sources may produce events simultaneously, and some of them are delayed due to latency in a network or other problem. As they arrive very late, data searches on relevant datasets are part of the challenge with non-order events. In addition, the conditions to help you decide whether an event is a non-organized event are very difficult to determine. In other words, whether all the events in each window were received or not is difficult to determine. In addition, it is a risk of resource dispute to handle these out-of-order events. Other ...