diff --git a/source/net/yacy/crawler/Balancer.java b/source/net/yacy/crawler/Balancer.java
index a15b75165..bd99c53a3 100644
--- a/source/net/yacy/crawler/Balancer.java
+++ b/source/net/yacy/crawler/Balancer.java
@@ -68,6 +68,7 @@ public class Balancer {
     private static final String indexSuffix           = "A.db";
     private static final int    EcoFSBufferSize       = 1000;
     private static final int    objectIndexBufferSize = 1000;
+    private static final int    MAX_DOUBLE_PUSH_CHECK = 100000;
 
     // class variables filled with external values
     private final File                 cacheStacksPath;
@@ -274,7 +275,7 @@ public class Balancer {
             if (this.double_push_check.has(hash)) return "double occurrence in double_push_check";
             if (this.urlFileIndex.has(hash)) return "double occurrence in urlFileIndex";
 
-            if (this.double_push_check.size() > 10000 || MemoryControl.shortStatus()) this.double_push_check.clear();
+            if (this.double_push_check.size() > MAX_DOUBLE_PUSH_CHECK || MemoryControl.shortStatus()) this.double_push_check.clear();
             this.double_push_check.put(hash);
 
             // add to index
diff --git a/source/net/yacy/crawler/CrawlStacker.java b/source/net/yacy/crawler/CrawlStacker.java
index 77f3e59df..bf0bdca41 100644
--- a/source/net/yacy/crawler/CrawlStacker.java
+++ b/source/net/yacy/crawler/CrawlStacker.java
@@ -465,14 +465,14 @@ public final class CrawlStacker {
                         ((System.currentTimeMillis() - oldDate.getTime()) / 60000 / 60 / 24) + " days ago.");
             } else {
                 if (dbocc == null) {
-                    return "double in: LURL-DB";
+                    return "double in: LURL-DB, oldDate = " + oldDate.toString();
                 }
                 if (this.log.isInfo()) this.log.logInfo("URL '" + urlstring + "' is double registered in '" + dbocc.toString() + "'. " + "Stack processing time:");
                 if (dbocc == HarvestProcess.ERRORS) {
                     final ZURL.Entry errorEntry = this.nextQueue.errorURL.get(url.hash());
-                    return "double in: errors (" + errorEntry.anycause() + ")";
+                    return "double in: errors (" + errorEntry.anycause() + "), oldDate = " + oldDate.toString();
                 }
-                return "double in: " + dbocc.toString();
+                return "double in: " + dbocc.toString() + ", oldDate = " + oldDate.toString();
             }
         }
 
diff --git a/source/net/yacy/crawler/data/CrawlQueues.java b/source/net/yacy/crawler/data/CrawlQueues.java
index 7edae18f5..f0e5fad87 100644
--- a/source/net/yacy/crawler/data/CrawlQueues.java
+++ b/source/net/yacy/crawler/data/CrawlQueues.java
@@ -148,9 +148,9 @@ public class CrawlQueues {
         if (this.errorURL.exists(hash)) {
             return HarvestProcess.ERRORS;
         }
-        if (this.noticeURL.existsInStack(hash)) {
-            return HarvestProcess.CRAWLER;
-        }
+        //if (this.noticeURL.existsInStack(hash)) {
+        //    return HarvestProcess.CRAWLER;
+        //} // this is disabled because it prevents propert crawling of smb shares. The cause is unknown
         for (final Loader worker: this.workers.values()) {
             if (Base64Order.enhancedCoder.equal(worker.request.url().hash(), hash)) {
                 return HarvestProcess.WORKER;
diff --git a/source/net/yacy/crawler/robots/RobotsTxt.java b/source/net/yacy/crawler/robots/RobotsTxt.java
index cd43677eb..1070100ad 100644
--- a/source/net/yacy/crawler/robots/RobotsTxt.java
+++ b/source/net/yacy/crawler/robots/RobotsTxt.java
@@ -235,6 +235,7 @@ public class RobotsTxt {
     }
 
     public void ensureExist(final MultiProtocolURI theURL, final Set<String> thisAgents, boolean concurrent) {
+        if (theURL.isLocal()) return;
         final String urlHostPort = getHostPort(theURL);
         if (urlHostPort == null) return;
         final BEncodedHeap robotsTable;