fix for http://forum.yacy-websuche.de/viewtopic.php?f=6&t=394&p=2382#p2382

git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@4135 6c8d7289-2bf4-0310-a012-ef5d649a1542

source/de/anomic/index/indexRAMRI.java

@@ -392,7 +392,8 @@ public final class indexRAMRI implements indexRI {
     }
 
     public synchronized indexContainer getContainer(String wordHash, Set urlselection) {
-
+        if (wordHash == null) return null;
+        
         // retrieve container
         indexContainer container = (indexContainer) cache.get(wordHash);
         

source/de/anomic/plasma/plasmaWordIndex.java

@@ -192,13 +192,12 @@ public final class plasmaWordIndex implements indexRI {
     }
     
     private void flushCache(indexRAMRI ram, int count) {
-        if (ram.size() <= count) count = ram.size();
-        if (count <= 0) return;
-        if (count > 5000) count = 5000;
         busyCacheFlush = true;
         String wordHash;
         ArrayList containerList = new ArrayList();
         synchronized (ram) {
+            count = Math.min(5000, Math.min(count, ram.size()));
+            if (count <= 0) return;
             boolean collectMax = true;
             indexContainer c;
             while (collectMax) {