Merge pull request #27 from nabam/patch-1

Catch UncheckedExecutionException in cache lookups

Author: pettermahlen

src/main/java/com/spotify/dns/CachingLookupFactory.java

@@ -19,6 +19,7 @@
 import com.google.common.base.Preconditions;
 import com.google.common.cache.Cache;
 import com.google.common.cache.CacheBuilder;
+import com.google.common.util.concurrent.UncheckedExecutionException;
 
 import org.xbill.DNS.Lookup;
 
@@ -58,6 +59,8 @@ public Lookup call() {
       );
     } catch (ExecutionException e) {
       throw new DnsException(e);
+    } catch (UncheckedExecutionException e) {
+      throw new DnsException(e);
     }
   }
 }