title: java.net.UnknownHostException in while running Play Framework Activator
body: <p>I am able to run and get results properly.
  I am getting below error while running activator in Play Framework 2.5.3.</p>
  
  <pre><code>Warning: node.js detection failed, sbt will use the Rhino based Trireme        JavaScript engine instead to run JavaScript assets  compilation,    which in some cases may be orders of magnitude slower than using node.js.
              [error] n.s.e.Cache - Unable to set localhost. This prevents      creation of a GUID. Cause was: linux-78et.suse: linux-  78et.suse: unknown error
            java.net.UnknownHostException: linux-78et.suse: linux-78et.suse: unknown error
      at java.net.InetAddress.getLocalHost(InetAddress.java:1505)
      at net.sf.ehcache.Cache.&lt;clinit&gt;(Cache.java:214)
      at     net.sf.ehcache.config.ConfigurationHelper.createCache(ConfigurationHelper.java:296)
      at    net.sf.ehcache.config.ConfigurationHelper.createDefaultCache(ConfigurationHelper.java:219)
         at net.sf.ehcache.CacheManager.configure(CacheManager.java:722)
         at net.sf.ehcache.CacheManager.doInit(CacheManager.java:439)
        at net.sf.ehcache.CacheManager.init(CacheManager.java:377)
        at net.sf.ehcache.CacheManager.&lt;init&gt;(CacheManager.java:259)
         at net.sf.ehcache.CacheManager.newInstance(CacheManager.java:1037)
        at net.sf.ehcache.CacheManager.newInstance(CacheManager.java:936)
      Caused by: java.net.UnknownHostException: linux-78et.suse: unknown error
        at java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method)
        at java.net.InetAddress$2.lookupAllHostAddr(InetAddress.java:928)
        at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1323)
        at java.net.InetAddress.getLocalHost(InetAddress.java:1500)
        at net.sf.ehcache.Cache.&lt;clinit&gt;(Cache.java:214)
        at net.sf.ehcache.config.ConfigurationHelper.createCache(ConfigurationHelper.java:296)
        at   net.sf.ehcache.config.ConfigurationHelper.createDefaultCache(ConfigurationHelper.java:219)
        at net.sf.ehcache.CacheManager.configure(CacheManager.java:722)
        at net.sf.ehcache.CacheManager.doInit(CacheManager.java:439)
        at net.sf.ehcache.CacheManager.init(CacheManager.java:377)
        [info] application - ApplicationTimer demo: Starting application at 2016-05-22T19:21:48.074Z.
  </code></pre>
  
  <p>Below is the image<a href="https://i.stack.imgur.com/Wm041.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Wm041.png" alt="enter image description here"></a></p>