prevent NPE on host link for to short HeuristicCfg.OpenSearchURL

htroot/ConfigHeuristics_p.java

@@ -177,14 +177,17 @@ public class ConfigHeuristics_p {
 
                 String tmps = e.getValue();
                 prop.putHTML("osdcfg_" + c + "_url", tmps);
-                tmps = tmps.substring(0,tmps.lastIndexOf("/"));
+                final int lastpos = tmps.lastIndexOf("/");
+                if (lastpos > 6) { // after http://x or ftp://x
+                    tmps = tmps.substring(0, lastpos);
                     prop.putHTML("osdcfg_" + c + "_urlhostlink", tmps);
+                } else prop.putHTML("osdcfg_" + c + "_urlhostlink", "#");
 
                 c++;
             }
             prop.put("osdcfg", c);
         } catch (final IOException e1) {
-            ConcurrentLog.logException(e1);
+            ConcurrentLog.warn("OpenSearchConnector", "file not found " + f.getAbsolutePath());
             prop.put("osdcfg", 0);
         }
         prop.putHTML("osderrmsg",osderrmsg);
@@ -232,7 +235,7 @@ public class ConfigHeuristics_p {
                 }
             }
         } catch (final IOException e) {
-            ConcurrentLog.logException(e);
+            ConcurrentLog.warn("OpenSearchConnector", "file not found " + f.getAbsolutePath());
         }
         
         // re-read config (and create/update work table)