Details
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Improvement
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Resolution: Done
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Major - P3
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None
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None
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MMS-Cloud-Automation - mongod 3.0.9 with mmapv1 on CentOS.
Description
Feedback from customer on CS ticket indicates the documentation fails to mention that you should not remove multiple members from a RS simultaneously. The RS may have too few voting members and the primary may step down.
https://jira.mongodb.org/browse/CS-28572
From the customer:
That documentation is not clear on the implications of removing multiple instances to reduce the size of a RS. I would suggest updating the documentation to make it clear that removing multiple members of an RS must either be done one node at a time, or that you should not remove more that would allow the original RS to form a majority.
The documentation in question is:
https://docs.cloud.mongodb.com/tutorial/edit-replica-set/
Refer to the section "Remove a Replica Set Member" near the bottom of the page.
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