UnknownHostException - CentOS droplet running tomcat7

  • Posted May 19, 2014

I changed my password, restarted the droplet and I couldnt start tomcat ever since, when I try to start tomcat if get “UnknownHostException”.

WHAT I tried so far: localhost localhost.localdomain localhost4 localhost4.localdomain4 ::1 localhost localhost.localdomain localhost6 localhost6.localdomain6

  • restarted the droplet, but its same issue. is my naming correct FQDN

2014-05-19 08:21:02,246 [localhost-startStop-1] ERROR ehcache.Cache - Unable to set localhost. This prevents creation of a GUID. Cause was: betaEgangan: betaEgangan: Name or service not known betaEgangan: betaEgangan: Name or service not known at at net.sf.ehcache.Cache.<clinit>( at net.sf.ehcache.config.ConfigurationHelper.createCache( at net.sf.ehcache.config.ConfigurationHelper.createDefaultCache( at net.sf.ehcache.CacheManager.configure( at net.sf.ehcache.CacheManager.init( at net.sf.ehcache.CacheManager.<init>( at net.sf.ehcache.hibernate.EhCacheRegionFactory.start( at java.util.concurrent.Executors$ at at java.util.concurrent.ThreadPoolExecutor.runWorker( at java.util.concurrent.ThreadPoolExecutor$ at Caused by: betaEgangan: Name or service not known at$1.lookupAllHostAddr( at at … 12 more

I can not ping this ip from outside the box

but ofcourse i can from within.


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Try replacing <pre>HOSTNAME=myhostname</pre> with <pre></pre> <br>Reboot your droplet, does that fix it?

even i am facing same error . <br> <br>/etc/sysconfig/network file contains <br> <br>HOSTNAME=myhostname <br> <br>$hostname -f <br>hostname: Unknown host <br> <br>what may be the error ? <br> <br>

What’s the output of running <code>hostname -f</code> in the console? What are the contents of your <code>/etc/sysconfig/network</code> file?