title: How to monitor Unexpectedly exited Threads?
body: <p>In multi thread programming, what if one of worker thread is unexpectedly exited and main thread needs to know whether that thread is alive or not.</p>
  
  <p>Is there any way to check this? </p>
  
  <p>I was wondering if there is a typical signal that is made when worker thread is exited.</p>
  
  <p>(Linux)</p>
  
  <p>Thank you</p>