August 2017
Beginner to intermediate
284 pages
6h 51m
English
Content preview from Mastering Apache Storm
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Guaranteed message processing
In a Storm topology, a single tuple being emitted by a spout can result in a number of tuples being generated in the later stages of the topology. For example, consider the following topology:
Here, Spout A emits a tuple T(A), which is processed by bolt B and bolt C, which emit tuple T(AB) and T(AC) respectively. So, when all the tuples produced as a result of tuple T(A)--namely, the tuple tree T(A), T(AB), and T(AC)--are processed, we say that the tuple has been processed completely.
When some of the tuples in a tuple tree fail to process either due to some runtime error or a timeout that is configurable for ...
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