fix for http://www.yacy-forum.de/viewtopic.php?p=18610#18610

git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@1841 6c8d7289-2bf4-0310-a012-ef5d649a1542
yacy · Mar 7, 2006 · 520b60f · 520b60f
1 parent 7cbd995
commit 520b60f
Showing 1 changed file with 4 additions and 2 deletions.
diff --git a/source/de/anomic/plasma/plasmaCrawlBalancer.java b/source/de/anomic/plasma/plasmaCrawlBalancer.java
@@ -91,8 +91,10 @@ public int size() {
 
     private int sizeDomainStacks() {
         int sum = 0;
-        Iterator i = domainStacks.values().iterator();
-        while (i.hasNext()) sum += ((ArrayList) i.next()).size();
+        if (domainStacks != null) synchronized (domainStacks) {
+            Iterator i = domainStacks.values().iterator();
+            while (i.hasNext()) sum += ((ArrayList) i.next()).size();
+        }
         return sum;
     }