title: IO thread error : 1595 (Relay log write failure: could not queue event from master)
body: <p>Slave status :</p>
  
  <pre><code>           Last_IO_Errno: 1595
             Last_IO_Error: Relay log write failure: could not queue event from master
             Last_SQL_Errno: 0
  </code></pre>
  
  <p>from error log :</p>
  
  <pre><code>       [ERROR] Slave I/O for channel 'db12': Unexpected master's heartbeat data: heartbeat is not compatible with local info; the event's data: log_file_name toku10-bin.000063&lt;D1&gt; log_pos 97223067, Error_code: 1623
         [ERROR] Slave I/O for channel 'db12': Relay log write failure: could not queue event from master, Error_code: 1595
  </code></pre>
  
  <blockquote>
    <p>I tried to restarting the slave_io thread for many times, still its same. </p>
  </blockquote>