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Shell repro on master :
mongos> db.version()
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3.7.1-340-gf2e1688
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MongoDB Enterprise > db.runCommand({create : "cappedColl", capped : true})
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{
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"ok" : 1,
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"$clusterTime" : {
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"clusterTime" : Timestamp(1518546909, 1),
|
"signature" : {
|
"hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
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"keyId" : NumberLong(0)
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}
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},
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"operationTime" : Timestamp(1518546901, 2)
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}
|
MongoDB Enterprise > db.getCollectionInfos()
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[
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{
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"name" : "cappedColl",
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"type" : "collection",
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"options" : {
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"capped" : true,
|
"size" : 0
|
},
|
"info" : {
|
"readOnly" : false,
|
"uuid" : UUID("ec90615e-a802-4529-a83f-e1e8163503a6")
|
},
|
"idIndex" : {
|
"v" : 2,
|
"key" : {
|
"_id" : 1
|
},
|
"name" : "_id_",
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"ns" : "JavaDriverTest.cappedColl"
|
}
|
}
|
]
|
The current behavior in 3.6 (and the behavior of replica sets on master), is that creating a capped collection without a size specified is an error:
MongoDB Enterprise > db.runCommand({create : "cappedColl", capped : true})
|
{
|
"ok" : 0,
|
"errmsg" : "specify size:<n> when capped is true",
|
"code" : 14832,
|
"codeName" : "Location14832"
|
}
|
|