title: Outdated deadlock info in 'show engine innodb status'
body: <p>I'm running a MariaDB Galera cluster with 3 nodes based on MariaDB 10.1.32. Currently im getting quite a lot of "Deadlock found" messages like this in my syslog:</p>
  
  <pre><code>2018-05-04  9:21:33 140130671872768 [ERROR] mysqld: Deadlock found when trying to get lock; try restarting transaction
  </code></pre>
  
  <p>In order to find the cause of the deadlocks i run "show engine innodb status" but the section "LATEST DETECTED DEADLOCK" only contains outdated info (according to the timestamp):</p>
  
  <pre><code>------------------------
  LATEST DETECTED DEADLOCK
  ------------------------
  2018-04-28 21:21:08 7f71a9450b00
  *** (1) TRANSACTION:
  [...]
  </code></pre>
  
  <p>Why are there deadlocks reported in the log but they don't show up in output of "show engine innodb status"?</p>