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  1. Core Server
  2. SERVER-12980

Background fields are not ignored when comparing index spec equality

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Details

    • Bug
    • Status: Closed
    • Major - P3
    • Resolution: Fixed
    • None
    • 2.6.0-rc1
    • Index Maintenance
    • ALL
    • Hide 

      var coll = db.newColl;
      		 
      coll.drop();
      		 
       
      		 
      coll.ensureIndex({foo: 1}, {background: false});
      		 
      coll.ensureIndex({foo: 1});

      Show
      var coll = db.newColl; coll.drop();   coll.ensureIndex({foo: 1}, {background: false}); coll.ensureIndex({foo: 1});

    Description

      If you have two index specs that are the same except for the presence of a 'background' field, ensureIndexes will no longer treat them as identical specs. This bug is a result of the changes from SERVER-10879.

      Error with master:

      > var coll = db.newColl;
      		 
      > coll.drop();
      		 
      true
      		 
      > 
      > coll.ensureIndex({foo: 1}, {background: false});
      		 
      WriteResult({ "nInserted" : 1 })
      		 
      > coll.ensureIndex({foo: 1});
      		 
      WriteResult({
      		 
      	"nInserted" : 0,
      		 
      	"writeError" : {
      		 
      		"code" : 67,
      		 
      		"errmsg" : "Index with name: foo_1 already exists with different options"
      		 
      	}
      		 
      })

      No error with 2.4.9:

      > var coll = db.newColl;
      		 
      > coll.drop();
      		 
      true
      		 
      > 
      > coll.ensureIndex({foo: 1}, {background: false});
      		 
      > coll.ensureIndex({foo: 1});
      		 
      > 
       

      Version: 914a26f51ff7ffeb28922273925318da6a6eba71

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        Issue Links

          is related to

          Bug - A problem which impairs or prevents the functions of the product. SERVER-13208 The dropDups index option should be ignored if the index already exists

          • Critical - P2 - Crashes, loss of data, severe memory leak.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. SERVER-10879 ensureIndex() on existing text index should not error

          • Minor - P4 - Minor loss of function, or other problem where easy workaround is present.
          • Closed

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              rassi J Rassi
              kamran.khan Kamran K.
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              Dates

                Created:
                Updated:
                Resolved: