diff --git a/source/de/anomic/search/SearchEvent.java b/source/de/anomic/search/SearchEvent.java
index a869bb272..33f7c92bc 100644
--- a/source/de/anomic/search/SearchEvent.java
+++ b/source/de/anomic/search/SearchEvent.java
@@ -393,16 +393,18 @@ public final class SearchEvent {
                 if (oldAbstract == null) {
                     // new abstracts in the cache
                     abstractsCache.put(wordhash, singleAbstract);
-                } else synchronized (oldAbstract) {
+                } else {
                     // extend the abstracts in the cache: join the single abstracts
                     for (final Map.Entry<String, String> oneref: singleAbstract.entrySet()) {
                         final String urlhash = oneref.getKey();
                         final String peerlistNew = oneref.getValue();
-                        final String peerlistOld = oldAbstract.get(urlhash);
-                        if (peerlistOld == null) {
-                            oldAbstract.put(urlhash, peerlistNew);
-                        } else {
-                            oldAbstract.put(urlhash, peerlistOld + peerlistNew);
+                        synchronized (oldAbstract) {
+                            final String peerlistOld = oldAbstract.get(urlhash);
+                            if (peerlistOld == null) {
+                                oldAbstract.put(urlhash, peerlistNew);
+                            } else {
+                                oldAbstract.put(urlhash, peerlistOld + peerlistNew);
+                            }
                         }
                     }
                     // abstractsCache.put(wordhash, oldAbstract);
diff --git a/source/de/anomic/yacy/yacySeed.java b/source/de/anomic/yacy/yacySeed.java
index a4148554c..2e3c1fee7 100644
--- a/source/de/anomic/yacy/yacySeed.java
+++ b/source/de/anomic/yacy/yacySeed.java
@@ -443,12 +443,16 @@ public class yacySeed implements Cloneable, Comparable<yacySeed>, Comparator<yac
      */
     public final String getPublicAddress() {
         String ip = this.getIP();
-        if (ip == null || ip.length() < 8) ip = "localhost";
+        if (ip == null || ip.length() < 8 || ip.length() > 60) ip = "localhost";
         
         final String port = this.dna.get(yacySeed.PORT);
-        if ((port == null) || (port.length() < 2)) return null;
+        if (port == null || port.length() < 2 || port.length() > 5) return null;
 
-        return ip + ":" + port;
+        StringBuilder sb = new StringBuilder(ip.length() + port.length() + 1);
+        sb.append(ip);
+        sb.append(':');
+        sb.append(port);
+        return sb.toString();
     }
     
     /**