diff --git a/source/de/anomic/crawler/RobotsTxt.java b/source/de/anomic/crawler/RobotsTxt.java
index e0381b51c..64c0f4535 100644
--- a/source/de/anomic/crawler/RobotsTxt.java
+++ b/source/de/anomic/crawler/RobotsTxt.java
@@ -70,7 +70,8 @@ public class RobotsTxt {
         this.syncObjects = new ConcurrentHashMap<String, DomSync>();
         this.tables = worktables;
         try {
-            log.info("initiated robots table: " + this.tables.getHeap(WorkTables.TABLE_ROBOTS_NAME).getFile());
+            this.tables.getHeap(WorkTables.TABLE_ROBOTS_NAME);
+            //log.info("initiated robots table: " + this.tables.getHeap(WorkTables.TABLE_ROBOTS_NAME).getFile());
         } catch (final IOException e) {
             try {
                 this.tables.getHeap(WorkTables.TABLE_ROBOTS_NAME).clear();
diff --git a/source/net/yacy/document/TextParser.java b/source/net/yacy/document/TextParser.java
index 3dec938ba..d4a2ba225 100644
--- a/source/net/yacy/document/TextParser.java
+++ b/source/net/yacy/document/TextParser.java
@@ -135,7 +135,7 @@ public final class TextParser {
         if (prototypeMime != null) for (String ext: parser.supportedExtensions()) {
             ext = ext.toLowerCase();
             final String s = ext2mime.get(ext);
-            if (s != null && !s.equals(prototypeMime)) log.logWarning("parser for extension '" + ext + "' was set to mime '" + s + "', overwriting with new mime '" + prototypeMime + "'.");
+            if (s != null && !s.equals(prototypeMime)) Log.logInfo("PARSER", "Parser for extension '" + ext + "' was set to mime '" + s + "', overwriting with new mime '" + prototypeMime + "'.");
             ext2mime.put(ext, prototypeMime);
         }
 
diff --git a/source/net/yacy/kelondro/blob/HeapReader.java b/source/net/yacy/kelondro/blob/HeapReader.java
index 251e5d435..8c6aa0b8a 100644
--- a/source/net/yacy/kelondro/blob/HeapReader.java
+++ b/source/net/yacy/kelondro/blob/HeapReader.java
@@ -663,13 +663,7 @@ public class HeapReader {
      * @return the length of the key
      */
     public int keylength() {
-        assert (this.index != null) : "index == null; closeDate=" + this.closeDate + ", now=" + new Date();
-        if (this.index == null) {
-            Log.logSevere("HeapReader", "this.index == null in keylength(); closeDate=" + this.closeDate + ", now=" + new Date() + this.heapFile == null ? "" : (" file = " + this.heapFile.toString()));
-            return 0;
-        }
-        if (this.index == null) return 0;
-        return this.index.row().primaryKeyLength;
+        return this.keylength;
     }
 
     /**
diff --git a/source/net/yacy/upnp/DiscoveryAdvertisement.java b/source/net/yacy/upnp/DiscoveryAdvertisement.java
index e088cebbc..f04eaf9c8 100644
--- a/source/net/yacy/upnp/DiscoveryAdvertisement.java
+++ b/source/net/yacy/upnp/DiscoveryAdvertisement.java
@@ -26,8 +26,8 @@
  *    prior written permission. For written permission, please contact
  *    info@sbbi.net.
  *
- * 5. Products  derived from this software may not be called 
- *    "SuperBonBon Industries", nor may "SBBI" appear in their name, 
+ * 5. Products  derived from this software may not be called
+ *    "SuperBonBon Industries", nor may "SBBI" appear in their name,
  *    without prior written permission of SuperBonBon Industries.
  *
  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
@@ -42,7 +42,7 @@
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  * This software  consists of voluntary contributions made by many individuals
- * on behalf of SuperBonBon Industries. For more information on 
+ * on behalf of SuperBonBon Industries. For more information on
  * SuperBonBon Industries, please see <http://www.sbbi.net/>.
  */
 package net.yacy.upnp;
@@ -67,7 +67,7 @@ import org.apache.commons.logging.LogFactory;
  * The listener thread is set to only accept matching device description and broadcast message sender IP to
  * avoid a security flaw with the protocol. If you are not happy with such behaviour you can set the
  * net.yacy.upnp.ddos.matchip system property to false to avoid this check.
- * 
+ *
  * @author <a href="mailto:superbonbon@sbbi.net">SuperBonBon</a>
  * @version 1.0
  */
@@ -123,7 +123,7 @@ public class DiscoveryAdvertisement implements Runnable
 
     /**
      * Registers an event category sent by UPNP devices
-     * 
+     *
      * @param notificationEvent the event type, either DiscoveryAdvertisement.EVENT_SSDP_ALIVE or
      *        DiscoveryAdvertisement.EVENT_SSDP_BYE_BYE
      * @param nt the type of device advertisement, upnp:rootdevice will return you all advertisement in
@@ -162,7 +162,7 @@ public class DiscoveryAdvertisement implements Runnable
 
     /**
      * Unregisters an event category sent by UPNP devices
-     * 
+     *
      * @param notificationEvent the event type, either DiscoveryAdvertisement.EVENT_SSDP_ALIVE or
      *        DiscoveryAdvertisement.EVENT_SSDP_BYE_BYE
      * @param nt the type of device advertisement, upnp:rootdevice will unregister all advertisement in
@@ -250,10 +250,11 @@ public class DiscoveryAdvertisement implements Runnable
             } catch ( SocketTimeoutException ex ) {
                 // ignoring
             } catch ( IOException ioEx ) {
-                log.warn("IO Exception during UPNP DiscoveryAdvertisement messages listening thread");
+                // fail silently
+                //log.warn("IO Exception during UPNP DiscoveryAdvertisement messages listening thread");
             } catch ( Exception ex ) {
-                log
-                    .warn("Fatal Error during UPNP DiscoveryAdvertisement messages listening thread, thread will exit");
+                // fail silently
+                //log.warn("Fatal Error during UPNP DiscoveryAdvertisement messages listening thread, thread will exit");
                 this.inService = false;
                 this.aliveRegistered.clear();
                 this.byeByeRegistered.clear();