diff --git a/source/de/anomic/http/httpc.java b/source/de/anomic/http/httpc.java
index 747caa9e6..820e29c04 100644
--- a/source/de/anomic/http/httpc.java
+++ b/source/de/anomic/http/httpc.java
@@ -98,7 +98,7 @@ public class httpc {
         java.security.Security.setProperty("networkaddress.cache.negative.ttl" , "0");
     }
 
-    private static String dnsResolveX(String host) {
+    public static String dnsResolve(String host) {
         // looks for the ip of host <host> and returns ip number as string
         String ip = (String) nameCacheHit.get(host);
         if (ip != null) return ip;
@@ -116,18 +116,6 @@ public class httpc {
         }
         return null;
     }
-    
-    public static String dnsResolve(String host) {
-        String ip = null;
-        for (int i = 0; i < 50; i++) {
-            ip = dnsResolveX(host);
-            if (ip != null) {
-                //if (i > 0) System.out.println(i + " attempts for " + host);
-                return ip;
-            }
-        }
-        return ip;
-    }
 
     public static boolean dnsFetch(String host) {
         // looks for the ip of host <host> and returns false if the host was in the cache
diff --git a/source/de/anomic/kelondro/kelondroException.java b/source/de/anomic/kelondro/kelondroException.java
index 57a617355..7a11df80e 100644
--- a/source/de/anomic/kelondro/kelondroException.java
+++ b/source/de/anomic/kelondro/kelondroException.java
@@ -49,7 +49,7 @@ public class kelondroException extends java.lang.RuntimeException {
     }
     
     public kelondroException(String database, String message) {
-        super(message + " in database '" + database + "'");
+        super(message + " in db '" + database + "'");
     }
     
 }
diff --git a/source/de/anomic/plasma/plasmaSearch.java b/source/de/anomic/plasma/plasmaSearch.java
index 3019a6efe..e576edc1a 100644
--- a/source/de/anomic/plasma/plasmaSearch.java
+++ b/source/de/anomic/plasma/plasmaSearch.java
@@ -211,9 +211,15 @@ public class plasmaSearch {
         Enumeration se = small.elements(true);
         plasmaWordIndexEntry ie;
         long stamp = System.currentTimeMillis();
-        while ((se.hasMoreElements()) && ((System.currentTimeMillis() - stamp) < time)) {
-            ie = (plasmaWordIndexEntry) se.nextElement();
-            if (large.contains(ie)) conj.addEntry(ie);
+        try {
+            while ((se.hasMoreElements()) && ((System.currentTimeMillis() - stamp) < time)) {
+                ie = (plasmaWordIndexEntry) se.nextElement();
+                if (large.contains(ie)) conj.addEntry(ie);
+            }
+        }  catch (kelondroException e) {
+            serverLog.logError("PLASMA", "joinConstructiveByTest: Database corrupt (" + e.getMessage() + "), deleting index");
+            small.deleteComplete();
+            return conj;
         }
         return conj;
     }
@@ -225,20 +231,58 @@ public class plasmaSearch {
         Enumeration e2 = i2.elements(true);
         int c;
         if ((e1.hasMoreElements()) && (e2.hasMoreElements())) {
-            plasmaWordIndexEntry ie1 = (plasmaWordIndexEntry) e1.nextElement();
-            plasmaWordIndexEntry ie2 = (plasmaWordIndexEntry) e2.nextElement();
+            plasmaWordIndexEntry ie1;
+            plasmaWordIndexEntry ie2;
+            try {
+                ie1 = (plasmaWordIndexEntry) e1.nextElement();
+            }  catch (kelondroException e) {
+                serverLog.logError("PLASMA", "joinConstructiveByEnumeration: Database corrupt 1 (" + e.getMessage() + "), deleting index");
+                i1.deleteComplete();
+                return conj;
+            }
+            try {
+                ie2 = (plasmaWordIndexEntry) e2.nextElement();
+            }  catch (kelondroException e) {
+                serverLog.logError("PLASMA", "joinConstructiveByEnumeration: Database corrupt 2 (" + e.getMessage() + "), deleting index");
+                i2.deleteComplete();
+                return conj;
+            }
             long stamp = System.currentTimeMillis();
             while ((System.currentTimeMillis() - stamp) < time) {
                 c = ie1.getUrlHash().compareTo(ie2.getUrlHash());
                 if (c < 0) {
-                    if (e1.hasMoreElements()) ie1 = (plasmaWordIndexEntry) e1.nextElement(); else break;
+                    try {
+                        if (e1.hasMoreElements()) ie1 = (plasmaWordIndexEntry) e1.nextElement(); else break;
+                    } catch (kelondroException e) {
+                        serverLog.logError("PLASMA", "joinConstructiveByEnumeration: Database 1 corrupt (" + e.getMessage() + "), deleting index");
+                        i1.deleteComplete();
+                        break;
+                    }
                 } else if (c > 0) {
-                    if (e2.hasMoreElements()) ie2 = (plasmaWordIndexEntry) e2.nextElement(); else break;
+                    try {
+                        if (e2.hasMoreElements()) ie2 = (plasmaWordIndexEntry) e2.nextElement(); else break;
+                    } catch (kelondroException e) {
+                        serverLog.logError("PLASMA", "joinConstructiveByEnumeration: Database 2 corrupt (" + e.getMessage() + "), deleting index");
+                        i2.deleteComplete();
+                        break;
+                    }
                 } else {
                     // we have found the same urls in different searches!
                     conj.addEntry(ie1);
-                    if (e1.hasMoreElements()) ie1 = (plasmaWordIndexEntry) e1.nextElement(); else break;
-                    if (e2.hasMoreElements()) ie2 = (plasmaWordIndexEntry) e2.nextElement(); else break;
+                    try {
+                        if (e1.hasMoreElements()) ie1 = (plasmaWordIndexEntry) e1.nextElement(); else break;
+                    } catch (kelondroException e) {
+                        serverLog.logError("PLASMA", "joinConstructiveByEnumeration: Database 1 corrupt (" + e.getMessage() + "), deleting index");
+                        i1.deleteComplete();
+                        break;
+                    }
+                    try {
+                        if (e2.hasMoreElements()) ie2 = (plasmaWordIndexEntry) e2.nextElement(); else break;
+                    }  catch (kelondroException e) {
+                        serverLog.logError("PLASMA", "joinConstructiveByEnumeration: Database 2 corrupt (" + e.getMessage() + "), deleting index");
+                        i2.deleteComplete();
+                        break;
+                    }
                 }
             }
         }
diff --git a/yacy.stopwords b/yacy.stopwords
index 99da3c6bb..f765f1320 100644
--- a/yacy.stopwords
+++ b/yacy.stopwords
@@ -519,7 +519,6 @@ perhaps
 post
 privat
 private
-problem
 prof
 put
 quite