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  • Zenifer Cheruveettil thinks this is interesting:

We think of this as a durability problem because you think your update has succeeded since the master acknowledged it, but a master node failure caused it to be lost.

From

Cover of NoSQL Distilled: A Brief Guide to the Emerging World of Polyglot Persistence

Note

this is the case when the setting "unclean-leader.election=false" in Kafka cluster