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From "Stefan Zoerner (JIRA)" <>
Subject [jira] Created: (DIRSERVER-904) Adding two schema elements of different type with the same OID is allowed, but it should not
Date Tue, 17 Apr 2007 12:07:15 GMT
Adding two schema elements of different type with the same OID is allowed, but it should not

                 Key: DIRSERVER-904
             Project: Directory ApacheDS
          Issue Type: Bug
          Components: schema
    Affects Versions: 1.5.0
         Environment: * ApacheDS 1.5.0
* Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_11-b03)
* Windows XP Professional SP2
            Reporter: Stefan Zoerner

If I try to add two schema elements with the same OID dynamically, the behavior depends on
the type of the elements (whether it differs or not).
It is possible to add an object class and an an attribute type with the same OID, here is
an example (OID 9.9.9 used for demonstration purposes):

LDIF of attribute type (also attached):

dn: m-oid=9.9.9,ou=attributeTypes,cn=other,ou=schema
m-equality: integerOrderingMatch
objectClass: metaAttributeType
objectClass: metaTop
objectClass: top
m-name: numberOfGuns
m-oid: 9.9.9
m-singleValue: TRUE
m-description: Number of guns of a ship
m-collective: FALSE
m-obsolete: FALSE
m-noUserModification: FALSE

LDIF of object class:

dn: m-oid=9.9.9,ou=objectClasses,cn=other,ou=schema
objectClass: top
objectClass: metaTop
objectClass: metaObjectclass
m-supObjectClass: top
m-oid: 9.9.9
m-name: ship
m-must: cn
m-may: numberOfGuns
m-may: description
m-typeObjectClass: STRUCTURAL
m-obsolete: FALSE
m-description: A ship

The addition works, but it should not

$ ldapmodify -h localhost -p 10389 -D "uid=admin,ou=system" -w secret -a -f numberOfGunsAttr.ldif
adding new entry m-oid=9.9.9,ou=attributeTypes,cn=other,ou=schema
$ ldapmodify -h localhost -p 10389 -D "uid=admin,ou=system" -w secret -a -f shipObjectClass.ldif
adding new entry m-oid=9.9.9,ou=objectClasses,cn=other,ou=schema

If I try to add two attribute types with the same OID (for instance in different meta schemata),
an error occurs:

$ ldapmodify -h localhost -p 10389 -D "uid=admin,ou=system" -w secret -a -f numberOfGunsAttr2.ldif
adding new entry m-oid=9.9.9,ou=attributeTypes,cn=sevenSeasSchema,ou=schema
ldap_add: Loop detected
ldap_add: additional info: failed to add entry m-oid=9.9.9,ou=attributeTypes,cn=sevenSeasSchema,ou=schema:
attributeType w/ OID 9.9.9 has already been registered!

Although the "Loop detected" sounds strange to me, the behavior is correct (it is not possible
to add an attribute type with an existing OID).

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