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  1. Core Server
  2. SERVER-22234

Collection with a long key fails validation

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    • Type: Icon: Bug Bug
    • Resolution: Done
    • Priority: Icon: Major - P3 Major - P3
    • 3.3.2
    • Affects Version/s: 3.2.0
    • Component/s: Storage
    • Fully Compatible
    • ALL
    • Hide 
      var coll=db.longindex;
coll.drop();
var shortVal = new Array(100).join('x');
var longVal = new Array(1025).join('x'); // Index key must be larger than 1024

db.adminCommand({setParameter: 1, failIndexKeyTooLong: false});

coll.insert({_id: shortVal});
var res = coll.validate({full: true, scandata: true});
assert(res.valid, tojson(res));

coll.insert({_id: longVal});
res = coll.validate({full: true, scandata: true});
assert(res.valid, tojson(res));
      Show
      var coll=db.longindex; coll.drop(); var shortVal = new Array(100).join( 'x' ); var longVal = new Array(1025).join( 'x' ); // Index key must be larger than 1024 db.adminCommand({setParameter: 1, failIndexKeyTooLong: false }); coll.insert({_id: shortVal}); var res = coll.validate({full: true , scandata: true }); assert (res.valid, tojson(res)); coll.insert({_id: longVal}); res = coll.validate({full: true , scandata: true }); assert (res.valid, tojson(res));
    • TIG F (01/29/16), TIG 10 (02/19/16)

      If a long index key (greater than 1024) is inserted into a collection (when the parameter failIndexKeyTooLong is set to false), then collection validate does not take it into account and fails. This seems to have been introduced from the work in SERVER-19521.

      {
	"ns" : "test.longindex",
	"nrecords" : 2,
	"nIndexes" : 1,
	"keysPerIndex" : {
		"test.longindex.$_id_" : 1
	},
	"indexDetails" : {
		"test.longindex.$_id_" : {
			"valid" : true
		}
	},
	"valid" : false,
	"errors" : [
		"number of _id index entries (1) does not match the number of documents (2)"
	],
	"advice" : "ns corrupt. See http://dochub.mongodb.org/core/data-recovery",
	"ok" : 1
}

            Assignee:
            robert.guo@mongodb.com Robert Guo (Inactive)
            Reporter:
            jonathan.abrahams Jonathan Abrahams
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              Created:
              Updated:
              Resolved: