Major - P3 This one I know to be an existing issue with mongostat 2.6 and earlier.
To reproduce:
1.) Start up a vanilla 3 node set on say ports 2400, 2401, 2402.
2.) $ mongostat --port 2400 --discover 5
insert query update delete getmore command flushes mapped vsize res faults locked db idx miss % qr|qw ar|aw netIn netOut conn set repl time
John-Morales-MacBook-Pro.local:2400 *0 *0 *0 *0 0 2|0 0 288.0M 2.7G 7.0M 0 local:0.0% 0 0|0 0|0 224b 1k 6 two-four SEC 22:35:59
John-Morales-MacBook-Pro.local:2401 *0 *0 *0 *0 0 1|0 0 288.0M 2.8G 6.0M 0 local:0.0% 0 0|0 0|0 177b 668b 7 two-four PRI 22:35:59
John-Morales-MacBook-Pro.local:2402 *0 *0 *0 *0 0 1|0 0 288.0M 2.8G 6.0M 0 local:0.0% 0 0|0 0|0 178b 628b 8 two-four SEC 22:35:59
localhost:2400 *0 *0 *0 *0 0 2|0 0 288.0M 2.7G 7.0M 0 local:0.0% 0 0|0 0|0 247b 1k 5 two-four SEC 22:35:59
John-Morales-MacBook-Pro.local:2400 *0 *0 *0 *0 0 2|0 0 288.0M 2.7G 7.0M 0 local:0.0% 0 0|0 0|0 224b 1k 7 two-four SEC 22:36:04
John-Morales-MacBook-Pro.local:2401 *0 *0 *0 *0 0 2|0 0 288.0M 2.8G 6.0M 0 local:0.0% 0 0|0 0|0 237b 790b 7 two-four PRI 22:36:04
John-Morales-MacBook-Pro.local:2402 *0 *0 *0 *0 0 2|0 0 288.0M 2.8G 6.0M 0 local:0.0% 0 0|0 0|0 227b 791b 7 two-four SEC 22:36:04
localhost:2400 *0 *0 *0 *0 0 2|0 0 288.0M 2.7G 7.0M 0 local:0.0% 0 0|0 0|0 213b 1k 7 two-four SEC 22:36:04
Note the repeated entries for the mongod on 2400 – one for localhost and another for the hostname.
A workaround does exist of specifying the correct hostname instead of letting mongostat default to localhost, e.g.,
$ mongostat --host John-Morales-MacBook-Pro.local --port 2400 --discover 5
There are no Sub-Tasks for this issue.