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From Tim Ward <tim.w...@featurespace.co.uk>
Subject How to deliberately cause a split brain?
Date Thu, 18 Jun 2020 08:26:07 GMT
I have been tasked with writing some monitoring code to detect a Zookeeper split brain using
the monitoring system.

All well and good, I think I can see how to do that, but what about testing? How can I deliberately
provoke a Zookeeper ensemble into going into a split brain state so that I can test the detection
code?

Scenarios might be along the lines of: the ops people want to increase an ensemble size, but
get something wrong in the (manual) writing of the configuration files or in the (manual)
restarting of instances. What "something" is likely to work here?


Tim Ward


Principal engineer


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