title: Why can't a new-added HBase region server get regions assigned to?
body: <p>When I added a new region server to the HBase cluster，no regions were assigned to this new region server. </p>
  
  <p>The new region server is now present on the web UI but its Num. Regions and Requests Per Second are both ZERO according the <a href="https://i.stack.imgur.com/nNRnz.jpg" rel="nofollow noreferrer">web UI</a>. </p>
  
  <p>This is the <a href="https://i.stack.imgur.com/PgSF8.jpg" rel="nofollow noreferrer">region server log</a> and this is the <a href="https://i.stack.imgur.com/55c1D.jpg" rel="nofollow noreferrer">master log</a>. </p>
  
  <p>It seems region server was added successfully but the re-balance mechanism didn't work. </p>
  
  <p>How can I make it to re-balance regions over all regions servers?</p>
  
  <p>This is the first time I ask question here, hope someone can help, thanks a lot.</p>