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  1. Jira Data Center
  2. JRASERVER-21442

Incorrect character comparison between different collation for MySQL

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      Detailed explanation can be found at:

      What this means for JIRA is that you might get duplicate result for different values as an affect of how MySQL handles character comparison.

      For example you might see errors such as:

      Cause:
      java.lang.RuntimeException: java.lang.RuntimeException: Found more than one user with name 'melgstrom'; ids [GenericEntity:OSUser][id,14773][name,melgström][passwordHash,x61Ey612Kl2gpFL56FT9weDnpSo4AV8j8+qx2AuTHdRyY036xxzTTrw10Wq3+4qQyB+XURPWx1ONxp3Y3pB37A==], [GenericEntity:OSUser][id,15020][name,melgstrom][passwordHash,x61Ey612Kl2gpFL56FT9weDnpSo4AV8j8+qx2AuTHdRyY036xxzTTrw10Wq3+4qQyB+XURPWx1ONxp3Y3pB37A==] 
      

      Making the coresponding select statement in MySQL returns:

      mysql> select * from userbase where username = 'melgstrom';
      +-------+------------+------------------------------------------------------------------------------------------+
      | ID    | username   | PASSWORD_HASH                                                                            |
      +-------+------------+------------------------------------------------------------------------------------------+
      | 14773 | melgström  | x61Ey612Kl2gpFL56FT9weDnpSo4AV8j8+qx2AuTHdRyY036xxzTTrw10Wq3+4qQyB+XURPWx1ONxp3Y3pB37A== |
      | 15020 | melgstrom  | x61Ey612Kl2gpFL56FT9weDnpSo4AV8j8+qx2AuTHdRyY036xxzTTrw10Wq3+4qQyB+XURPWx1ONxp3Y3pB37A== |
      +-------+------------+------------------------------------------------------------------------------------------+
      

              Unassigned Unassigned
              hchen@atlassian.com Han Chen
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                Created:
                Updated:
                Resolved: