Details
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Improvement
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Resolution: Won't Fix
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Major - P3
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None
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None
Description
With three config servers set up it is possible to have a scenario when after CNAME change connections to config servers established incorrectly. For example, mongos, instead of connecting to the config servers #1, #2 and #3 may have two connections to the config server #1, none to #2 and one to #3. That may be caused by a non-zero TTL value set for a CNAME record used to host a config server. This article should contain a recommendation to have CNAME's TTL set to zero.