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How to check if a mongo client is still valid, i.e., it is still connected or active?

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How to check if a mongo client is still valid, i.e., it is still connected or active?
posted Jun 17, 2017 by anonymous

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Can we use mongo recommended snapshot i.e LVM snapshot across versions? i.e snapshot taken from v2.4.10 and restore it to v3.0.4.
We have tested the same and this works. Is this recommended by mongo?

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I have 3 node replicates and i am using all the host in my connection string.Once i execute my node.js script i want to see which particular host it got connected to.
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hostnamedb.hostInfo().system.hostnamers.status().members.find(r=>r.state===1).name
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