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The dbhash command returns a misleading error when running an old form of the command:
// run dbHash using the old way
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> db.runCommand( { dbHash : 'config' } )
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{ "ok" : 0, "errmsg" : "need a valid database name", "code" : 28539 }
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// but, thisis case, the "config" database exists and is valid
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> show dbs
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config 0.023GB
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// run with the new way with now problem
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> db.runCommand( { dbHash : 1, collections: ['config'] } )
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{
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"host" : "Stevens-MacBook-Pro-2.local",
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"collections" : {
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},
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"md5" : "d41d8cd98f00b204e9800998ecf8427e",
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"timeMillis" : 0,
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"fromCache" : [ ],
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"ok" : 1
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}
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