Details
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Task
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Resolution: Done
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Major - P3
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Description
Customer could not find any information on how to change a regular member of a Replica Set into an Arbiter.
From the linked ticket, the following instructions were given:
Probably the safest way would be to start a new mongod in arbiter mode while the current mongod secondary is still running on the box. Once you have made sure the new arbiter is attached to the replica set and everything is running smoothly, you can shutdown the old secondary mongod. You will need to make sure the new process is starting on a different port to your old secondary.
One thing you will want to bear in mind is if you have your application connection string referencing the old secondary, you will need to remove this reference.