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  1. Core Server
  2. SERVER-12973

update command can make document larger than 16MB

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    • Type: Icon: Bug Bug
    • Resolution: Done
    • Priority: Icon: Major - P3 Major - P3
    • 2.6.0-rc2
    • Affects Version/s: 2.6.0-rc0
    • Component/s: Write Ops
    • None
    • Fully Compatible
    • ALL
    • Hide 
      var maxBsonObjectSize = db.isMaster().maxBsonObjectSize;
var bigness = maxBsonObjectSize + 16261;
var big_string = '';

while (big_string.length < bigness) big_string += 'a';

db.collection.drop();
var result = db.runCommand({
    update: 'collection',
    ordered: true,
    updates: [
        {
            q: {x: 1},
            u: {$set: {s: big_string}},
            multi: false,
            upsert: true
        }
    ]
});

printjson(result);
var overbigness = Object.bsonsize(db.collection.findOne()) - maxBsonObjectSize;
print('made document ' + overbigness + ' bytes too big.')
      Show
      var maxBsonObjectSize = db.isMaster().maxBsonObjectSize; var bigness = maxBsonObjectSize + 16261; var big_string = ''; while (big_string.length < bigness) big_string += 'a' ; db.collection.drop(); var result = db.runCommand({ update: 'collection' , ordered: true , updates: [ { q: {x: 1}, u: {$set: {s: big_string}}, multi: false , upsert: true } ] }); printjson(result); var overbigness = Object .bsonsize(db.collection.findOne()) - maxBsonObjectSize; print( 'made document ' + overbigness + ' bytes too big.' )

      The "update" command with "upsert: true" can make documents up to 16302 bytes larger than maxBsonObjectSize.

            Assignee:
            randolph@mongodb.com Randolph Tan
            Reporter:
            jesse@mongodb.com A. Jesse Jiryu Davis
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              Created:
              Updated:
              Resolved: