title: How can release unused resource.Thread( OkHttp ConnectionPool ) in OkHttp
body: <p>I am invoking evictAll from connectionPool and cancelAll from dispatchers.
  but it is not killing the thread ( OkHttp ConnectionPool ).</p>
  
  <p><strong>Here is the Thread stacktrace.</strong></p>
  
  <pre><code>[info]java.lang.Object.wait(Native Method)
  [info] java.lang.Object.wait(Object.java:460)
  [info] okhttp3.ConnectionPool$1.run(ConnectionPool.java:66)
  [info] java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
  [info] java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
  [info] java.lang.Thread.run(Thread.java:748)
  </code></pre>
  
  <p>is there any option to kill these threads ?</p>
  
  <p>okhttp build:- 3.7.0</p>