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5.6 replication to 5.5 master 2049 error

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  • 5.6 replication to 5.5 master 2049 error

    Testing the 5.6.11rc from Percona and after upgrading (replacing) via RPM on x86_64 (CentOS 6.4) and trying to restart replication I am getting this error:

    Last_IO_Errno: 2049
    Last_IO_Error: error connecting to master 'xxxxx@xxxx' - retry-time: 60 retries: 1

    We have been using old passwords for sometime and I don't believe this problem existed in earlier releases of 5.6 and there is some indication that 5.6.11 broke this.

    https://github.com/santisaez/powerstack/issues/63 - second item (I realize that is a different source tree, but thinking it might be applicable)

    my.cnf:

    secure-auth=0
    old_passwords=1

    I also tried with old_passwords=0 and issued a change master master_password.

    Anyone else run into this issue?

    - Aaron

  • #2
    Can you confirm which server did you upgrade, master or slave or both?
    Note that since 5.6.5 the secure_auth is by default enabled. You may double check this variable on master with
    SHOW VARIABLES LIKE 'secure_auth' ;
    Also did you check the password is now in long format on master after changing?

    Comment


    • #3
      Upgrading slave (5.5 -> 5.6) first, and that [slave] will promoted to master and then the original master will be upgraded and become the slave.

      I verified the show variables showed secure_auth as OFF.

      As for making the change on the master for the password on the master we currently have old_passwords=1 and passwords are created in 16 byte format. It is my understanding that it is safe to turn off old_passwords as long as secure_auth isn't enabled. Is that correct? I don't want to end up in a state where slaves can no longer connect. All slaves and masters are 5.5.15 or higher.

      We are at the early stages or our migration and this was the first obstacle that we couldn't find a work around for [without making any change on the master]. If changing the password on the master is simply turning off old_passwords and clients connecting will be able to negotiate both as needed then that is an acceptable option. However if the auth system was broken in 5.6.11 then that is a larger concern.

      Side note;
      We tested the upgrade with Oracle 5.6.11 as well and it had the same problem.

      Comment


      • #4
        I just wanted to follow up here. I wound up creating a similar user with the "new" format for a specific IP in the 5.5 master. This allowed both the 5.6 and any legacy clients to connect successfully. I was then able replicate from 5.5 master to 5.6 with no problems. On the 5.5 servers I did the following:

        mysql> SET SESSION old_passwords = 0;
        mysql> SET sql_log_bin = 0;
        mysql> GRANT REPLICATION CLIENT ON *.* TO 'replicator'@'<ip address>' IDENTIFIED BY 'secret';

        No changes to the secure_auth setting were made.

        This worked in my case because were using 10.% style host for the "old" password user entry so the ip specific one was treated as a distinct entry.

        - Aaron

        Comment


        • #5
          Aaron,

          Let me show you a simple example:

          Code:
          mysql> SET old_passwords=1;
          Query OK, 0 rows affected (0.00 sec)
          
          mysql> GRANT USAGE ON *.* TO 'test1'@'10.%' IDENTIFIED BY 'mypass';
          Query OK, 0 rows affected (0.01 sec)
          
          mysql> SET old_passwords=0;
          Query OK, 0 rows affected (0.00 sec)
          
          mysql> GRANT USAGE ON *.* TO 'test2'@'10.%' IDENTIFIED BY 'mypass';
          Query OK, 0 rows affected (0.01 sec)
          
          mysql> select user,host,password from mysql.user where user like "test%";
          +-------+------+-------------------------------------------+
          | user  | host | password                                  |
          +-------+------+-------------------------------------------+
          | test1 | 10.% | 6f8c114b58f2ce9e                          |
          | test2 | 10.% | *6C8989366EAF75BB670AD8EA7A7FC1176A95CEF4 |
          +-------+------+-------------------------------------------+
          2 rows in set (0.00 sec)
          Also, the old password format is really needed only for pre-4.1 clients, so those created in prehistoric times of MySQL 4.0 and earlier
          So I would suggest to update all the passwords into new, long hash format, test that all authentication works, and only then you can also enable secure_auth variable.
          Basically, this variable will block using old format passwords in the future, so even if someone explicitly enables old_passwords and set short-hash password, it won't work for authentication.

          You can find many details and examples in official documentation:
          http://dev.mysql.com/doc/refman/5.6/...d-hashing.html

          Comment


          • #6
            Hello,

            I get this same problem when trying to replicate from 5.0.x to 5.7, I am trying to upgrade. None of these solutions work as the 5.0 system only does the older form of authentication and everything I have tried for replication fails with error code 2049, implying secure auth is in use but vars show that it is not:

            Code:
            +---------------+-------+
            | Variable_name | Value |
            +---------------+-------+
            | secure_auth | OFF |
            +---------------+-------+
            1 row in set (0.00 sec)
            
            mysql> show variables like '%old_pass%';
            +---------------+-------+
            | Variable_name | Value |
            +---------------+-------+
            | old_passwords | 1 |
            +---------------+-------+
            1 row in set (0.00 sec)
            
            mysql> show slave status;
            ... 2049 | error connecting to master ...
            Any thoughts on how to proceed?


            Comment


            • #7
              I downgraded to 5.6.13 with the same result... Any thoughts?

              Comment


              • #8
                Solved it, needed a second user...

                Comment


                • #9
                  hey

                  am stuck with the same issue.
                  old mysql version on master and slave 5.1.32
                  new mysql version on slave 5.6.14.

                  slave is stuck with error 2049...error connecting to master.
                  created a new user as suggested by texiwill.
                  doesnt work.

                  mysql -uroot -h<slave user> -p<slave password> works perfect from the slave.
                  old_passwords=1 on slave.

                  Comment

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