From 520b60f15b10a7cb8d860772c7bb15392915d5cf Mon Sep 17 00:00:00 2001
From: orbiter <orbiter@6c8d7289-2bf4-0310-a012-ef5d649a1542>
Date: Tue, 7 Mar 2006 19:28:06 +0000
Subject: [PATCH] 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
---
 source/de/anomic/plasma/plasmaCrawlBalancer.java | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/source/de/anomic/plasma/plasmaCrawlBalancer.java b/source/de/anomic/plasma/plasmaCrawlBalancer.java
index 095dfee55..1a707d54a 100644
--- a/source/de/anomic/plasma/plasmaCrawlBalancer.java
+++ b/source/de/anomic/plasma/plasmaCrawlBalancer.java
@@ -91,8 +91,10 @@ public class plasmaCrawlBalancer {
     
     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;
     }