title: Parallel stream doesn't set Thread.contextClassLoader after tomcat upgrade
body: <p>After tomcat upgrade from 8.5.6 to 8.5.28 parallel stream stopped supplying Threads with contextClassLoader:</p>
  
  <p>Because of it <code>Warmer::run</code> can't load classes in it.</p>
  
  <pre><code>warmers.parallelStream().forEach(Warmer::run);
  </code></pre>
  
  <p>Do you have any ideas what Tomcat was supplying for contextClassLoaders for new Threads? </p>
  
  <p>ParallelStream uses ForkJoinPool in newest Tomcat.</p>