Working with Storm Topologies
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Enabling Topology Event Logging

The topology event inspector lets you view tuples as they flow through different stages of a Storm topology. This tool is useful for inspecting tuples emitted from a spout or a bolt in the topology pipeline while the topology is running; you do not need to stop or redeploy the topology to use the event inspector. The normal flow of tuples from spouts to bolts is not affected by turning on event logging.