mysql ssl replication - fails while attempting to connect to master
The manual gives an explanation for IO error number 1129 and also the command that solves the problem:


  Error: 1129 SQLSTATE: HY000 (ER_HOST_IS_BLOCKED)
  
  Message: Host '%s' is blocked because of many connection errors;
  unblock with 'mysqladmin flush-hosts'


Note that this error may be a consequence of another underlying problem.