ORA-01017: invalid username/password through dblink when select from view

Question

Hello all,
I work on 2 databases :
- One is a 10g (let's call it db_10 )
- The second one is a 11g (let's call it db_11 )
I created a view V_PROTOCOLES in schema SCHEMA_1 on db_11.
The FROM clause of this view call 4 tables :
- table1 : owner is SCHEMA_1
- table2 : owner is SCHEMA_2 (schema on db_11 )
- table3 : owner is SCHEMA_3 (schema on db_10 )
- table4 : owner is SCHEMA_4 (schema on db_10 )
When I simply run SELECT * FROM V_PROTOCOLES on db11 with user X, I can have a result.
The problem occurs when I connect on db10 also with user X. The V_PROTOCOLES view has a public synonym using the dblink DBDOC_LINK (without explicitly specify a user, so it connects with the X user).
But here I can't run the SELECT * FROM V_PROTOCOLES. I Have the following error :
ORA-01017: invalid username/password; logon denied
ORA-02063: preceding line from DBDOC_LINKThe passwords for user X are obviously the same on both 10g and 11g databases.
Thanks for the help !

Answer 1

On 10g :
select password from dba_users where username = 'U872574';
PASSWORD
30811840BC618B77On 11g :
select password from sys.user$ where name='U872574';
PASSWORD
30811840BC618B77I dropped and recreated the dblink but the problem always occurs...
(By the way, curiously when I dropped the dblink I have no invalid objects although it is used in different packages or triggers)