title: Solr Admin Panel Returning 500 Server Error.
body: <p>I am configuring solr 5.5 and after starting the solr (bin/solr start), on accessing the admin panel, i see 500 error with description</p>
  
  <p>HTTP ERROR 500</p>
  
  <p>Problem accessing /solr/. Reason:</p>
  
  <pre><code>Server Error
  </code></pre>
  
  <p>Caused by:</p>
  
  <p>org.apache.solr.common.SolrException: Error processing the request. CoreContainer is either not initialized or shutting down.
      at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:191)
      at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:183)
      at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)
      at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:585)
      at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
      at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:577)
      at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:223)
      at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1127)
      at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:515)
      at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)
      at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1061)
      at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
      at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:215)
      at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:110)
      at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)
      at org.eclipse.jetty.server.Server.handle(Server.java:499)
      at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:310)
      at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:257)
      at org.eclipse.jetty.io.AbstractConnection$2.run(AbstractConnection.java:540)
      at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:635)
      at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:555)
      at java.lang.Thread.run(Thread.java:745)</p>
  
  <p>I took the zip from my friend's machine for which its working, and tried on my local, but same problem. Looks like some configuration problem with my machine.</p>
  
  <p>Note : When i run the server on Clound mode (bin/solr start -e cloud -noprompt), i am able to access the admin panel.</p>