title: HTTP ERROR 503 Service Unavailable MESSAGE: Service Unavailable SERVLET: - Powered by Jetty:// 10.0.6
body: <p>I ran a java project but got the above error. Please help me resolve it. Here is the log of console windows and the content of error:</p>
  <p>HTTP ERROR 503 Service Unavailable
  URI:    /PES/
  STATUS: 503
  MESSAGE:    Service Unavailable
  SERVLET:    -
  Powered by Jetty:// 10.0.6</p>
  <p>Starting preview server on port 8080</p>
  <p>Modules:
  PES (/PES)</p>
  <p>SLF4J: Failed to load class &quot;org.slf4j.impl.StaticLoggerBinder&quot;.
  SLF4J: Defaulting to no-operation (NOP) logger implementation
  SLF4J: See <a href="http://www.slf4j.org/codes.html#StaticLoggerBinder" rel="nofollow noreferrer">http://www.slf4j.org/codes.html#StaticLoggerBinder</a> for further details.</p>