diff --git a/source/net/yacy/cora/document/MultiProtocolURI.java b/source/net/yacy/cora/document/MultiProtocolURI.java
index 3f422f927..5d9775664 100644
--- a/source/net/yacy/cora/document/MultiProtocolURI.java
+++ b/source/net/yacy/cora/document/MultiProtocolURI.java
@@ -2042,9 +2042,7 @@ public class MultiProtocolURI implements Serializable, Comparable<MultiProtocolU
             return new ByteArrayInputStream(b);
         }
         if (isHTTP() || isHTTPS()) {
-                final HTTPClient client = new HTTPClient();
-                client.setTimout(timeout);
-                client.setUserAgent(userAgent);
+                final HTTPClient client = new HTTPClient(userAgent, timeout);
                 client.setHost(getHost());
                 return new ByteArrayInputStream(client.GETbytes(this));
         }
@@ -2063,9 +2061,7 @@ public class MultiProtocolURI implements Serializable, Comparable<MultiProtocolU
             return b;
         }
         if (isHTTP() || isHTTPS()) {
-                final HTTPClient client = new HTTPClient();
-                client.setTimout(timeout);
-                client.setUserAgent(userAgent);
+                final HTTPClient client = new HTTPClient(userAgent, timeout);
                 client.setHost(getHost());
                 return client.GETbytes(this);
         }
diff --git a/source/net/yacy/cora/protocol/ClientIdentification.java b/source/net/yacy/cora/protocol/ClientIdentification.java
index d56fe08cc..e846fc1e0 100644
--- a/source/net/yacy/cora/protocol/ClientIdentification.java
+++ b/source/net/yacy/cora/protocol/ClientIdentification.java
@@ -27,6 +27,8 @@ package net.yacy.cora.protocol;
 
 public class ClientIdentification {
 
+    public static final int DEFAULT_TIMEOUT = 10000;
+    
     /**
      * provide system information (this is part of YaCy protocol)
      */
diff --git a/source/net/yacy/cora/protocol/http/HTTPClient.java b/source/net/yacy/cora/protocol/http/HTTPClient.java
index 0af60bafc..4a71c382b 100644
--- a/source/net/yacy/cora/protocol/http/HTTPClient.java
+++ b/source/net/yacy/cora/protocol/http/HTTPClient.java
@@ -118,19 +118,17 @@ public class HTTPClient {
 	private boolean redirecting = true;
 	private String realm = null;
 
-	public HTTPClient() {
-        super();
-    }
-
 	public HTTPClient(final String userAgent) {
         super();
         this.userAgent = userAgent;
+        HttpProtocolParams.setUserAgent(httpClient.getParams(), userAgent);
     }
 
 	public HTTPClient(final String userAgent, final int timeout) {
         super();
         this.userAgent = userAgent;
         this.timeout = timeout;
+        HttpProtocolParams.setUserAgent(httpClient.getParams(), userAgent);
     }
 
     public static void setDefaultUserAgent(final String defaultAgent) {
@@ -759,7 +757,7 @@ public class HTTPClient {
         } catch (final UnsupportedEncodingException e) {
             System.out.println(e.getStackTrace());
         }
-        final HTTPClient client = new HTTPClient();
+        final HTTPClient client = new HTTPClient(ClientIdentification.getUserAgent(), ClientIdentification.DEFAULT_TIMEOUT);
         client.setUserAgent("foobar");
         client.setRedirecting(false);
         // Get some
diff --git a/source/net/yacy/crawler/Balancer.java b/source/net/yacy/crawler/Balancer.java
index e1d5b142d..7e8f9eeec 100644
--- a/source/net/yacy/crawler/Balancer.java
+++ b/source/net/yacy/crawler/Balancer.java
@@ -310,6 +310,15 @@ public class Balancer {
         return sleeptime;
     }
     
+    /**
+     * load a robots.txt to get the robots time.
+     * ATTENTION: this method causes that a robots.txt is loaded from the web which may cause a longer delay in execution.
+     * This shall therefore not be called in synchronized environments.
+     * @param robots
+     * @param profileEntry
+     * @param crawlURL
+     * @return
+     */
     private long getRobotsTime(final RobotsTxt robots, final CrawlProfile profileEntry, final DigestURI crawlURL) {
         if (profileEntry == null) return 0;
         long sleeptime = Latency.waitingRobots(crawlURL, robots, this.myAgentIDs); // this uses the robots.txt database and may cause a loading of robots.txt from the server
@@ -455,10 +464,10 @@ public class Balancer {
             	rest = rest + 1000 * loops;
             	loops = 0;
             }
-            if (rest > 0) {try {this.wait(rest); } catch (final InterruptedException e) {}}
+            if (rest > 0) {try {Thread.sleep(rest);} catch (final InterruptedException e) {}}
             for (int i = 0; i < loops; i++) {
             	Log.logInfo("BALANCER", "waiting for " + crawlEntry.url().getHost() + ": " + (loops - i) + " seconds remaining...");
-                try {this.wait(1000); } catch (final InterruptedException e) {}
+                try {Thread.sleep(1000); } catch (final InterruptedException e) {}
             }
             Latency.updateAfterSelection(crawlEntry.url(), robotsTime);
         }
@@ -488,6 +497,7 @@ public class Balancer {
         	byte[] besturlhash = null;
         	String besthost = null;
         	OrderedScoreMap<Map.Entry<String, byte[]>> nextZeroCandidates = new OrderedScoreMap<Map.Entry<String, byte[]>>(null);
+        	int newCandidatesForward = 10;
         	while (i.hasNext() && nextZeroCandidates.size() < 1000) {
                 entry = i.next();
     
@@ -516,7 +526,13 @@ public class Balancer {
                 }
 
                 if (w <= 0) {
-                    nextZeroCandidates.set(new AbstractMap.SimpleEntry<String, byte[]>(entry.getKey(), urlhash), w == Integer.MIN_VALUE ? 1000 /* get new domains a chance */ : entry.getValue().size());
+                    if (w == Integer.MIN_VALUE && newCandidatesForward > 0) {
+                        // give new domains a chance, but not too much; otherwise a massive downloading of robots.txt from too much domains (dns lock!) will more likely block crawling
+                        newCandidatesForward--;
+                        nextZeroCandidates.set(new AbstractMap.SimpleEntry<String, byte[]>(entry.getKey(), urlhash), 1000);
+                    } else {
+                        nextZeroCandidates.set(new AbstractMap.SimpleEntry<String, byte[]>(entry.getKey(), urlhash), entry.getValue().size());
+                    }
                 }
                 if (w < smallestWaiting || (w == smallestWaiting && this.random.nextBoolean())) {
                     smallestWaiting = w;
diff --git a/source/net/yacy/crawler/CrawlStacker.java b/source/net/yacy/crawler/CrawlStacker.java
index b5f8062cc..1ffae79a9 100644
--- a/source/net/yacy/crawler/CrawlStacker.java
+++ b/source/net/yacy/crawler/CrawlStacker.java
@@ -374,7 +374,7 @@ public final class CrawlStacker {
         final DigestURI referrerURL = (entry.referrerhash() == null || entry.referrerhash().length == 0) ? null : this.nextQueue.getURL(entry.referrerhash());
 
         // add domain to profile domain list
-        if (profile.domMaxPages() != Integer.MAX_VALUE) {
+        if (profile.domMaxPages() != Integer.MAX_VALUE && profile.domMaxPages() > 0) {
             profile.domInc(entry.url().getHost(), (referrerURL == null) ? null : referrerURL.getHost().toLowerCase(), entry.depth());
         }
 
@@ -478,7 +478,7 @@ public final class CrawlStacker {
 
         // deny urls that exceed allowed number of occurrences
         final int maxAllowedPagesPerDomain = profile.domMaxPages();
-        if (maxAllowedPagesPerDomain < Integer.MAX_VALUE) {
+        if (maxAllowedPagesPerDomain < Integer.MAX_VALUE && maxAllowedPagesPerDomain > 0) {
             final DomProfile dp = profile.getDom(url.getHost());
             if (dp != null && dp.count >= maxAllowedPagesPerDomain) {
                 if (this.log.isFine()) this.log.logFine("URL '" + urlstring + "' appeared too often in crawl stack, a maximum of " + profile.domMaxPages() + " is allowed.");
diff --git a/source/net/yacy/crawler/data/NoticedURL.java b/source/net/yacy/crawler/data/NoticedURL.java
index 2c76050b9..6052a4be0 100644
--- a/source/net/yacy/crawler/data/NoticedURL.java
+++ b/source/net/yacy/crawler/data/NoticedURL.java
@@ -95,7 +95,7 @@ public class NoticedURL {
         this.noloadStack.clear();
     }
 
-    protected synchronized void close() {
+    protected void close() {
         Log.logInfo("NoticedURL", "CLOSING ALL STACKS");
         if (this.coreStack != null) {
             this.coreStack.close();
@@ -303,19 +303,17 @@ public class NoticedURL {
         int s;
         Request entry;
         int errors = 0;
-        synchronized (balancer) {
-            while ((s = balancer.size()) > 0) {
-                entry = balancer.pop(delay, cs, robots);
-                if (entry == null) {
-                    if (s > balancer.size()) continue;
-                    errors++;
-                    if (errors < 100) continue;
-                    final int aftersize = balancer.size();
-                    balancer.clear(); // the balancer is broken and cannot shrink
-                    Log.logWarning("BALANCER", "entry is null, balancer cannot shrink (bevore pop = " + s + ", after pop = " + aftersize + "); reset of balancer");
-                }
-                return entry;
+        while ((s = balancer.size()) > 0) {
+            entry = balancer.pop(delay, cs, robots);
+            if (entry == null) {
+                if (s > balancer.size()) continue;
+                errors++;
+                if (errors < 100) continue;
+                final int aftersize = balancer.size();
+                balancer.clear(); // the balancer is broken and cannot shrink
+                Log.logWarning("BALANCER", "entry is null, balancer cannot shrink (bevore pop = " + s + ", after pop = " + aftersize + "); reset of balancer");
             }
+            return entry;
         }
         return null;
     }
diff --git a/source/net/yacy/crawler/retrieval/HTTPLoader.java b/source/net/yacy/crawler/retrieval/HTTPLoader.java
index 7846e1533..dcf6ed3aa 100644
--- a/source/net/yacy/crawler/retrieval/HTTPLoader.java
+++ b/source/net/yacy/crawler/retrieval/HTTPLoader.java
@@ -126,7 +126,7 @@ public final class HTTPLoader {
         requestHeader.put(HeaderFramework.ACCEPT_ENCODING, this.sb.getConfig("crawler.http.acceptEncoding", DEFAULT_ENCODING));
 
         // HTTP-Client
-        final HTTPClient client = new HTTPClient();
+        final HTTPClient client = new HTTPClient(ClientIdentification.getUserAgent(), ClientIdentification.DEFAULT_TIMEOUT);
         client.setRedirecting(false); // we want to handle redirection ourselves, so we don't index pages twice
         client.setTimout(this.socketTimeout);
         client.setHeader(requestHeader.entrySet());
@@ -252,7 +252,7 @@ public final class HTTPLoader {
         requestHeader.put(HeaderFramework.ACCEPT_CHARSET, DEFAULT_CHARSET);
         requestHeader.put(HeaderFramework.ACCEPT_ENCODING, DEFAULT_ENCODING);
 
-        final HTTPClient client = new HTTPClient();
+        final HTTPClient client = new HTTPClient(ClientIdentification.getUserAgent(), ClientIdentification.DEFAULT_TIMEOUT);
         client.setTimout(20000);
         client.setHeader(requestHeader.entrySet());
         	final byte[] responseBody = client.GETbytes(request.url());
diff --git a/source/net/yacy/crawler/robots/RobotsTxt.java b/source/net/yacy/crawler/robots/RobotsTxt.java
index c2c8d0904..c30db0801 100644
--- a/source/net/yacy/crawler/robots/RobotsTxt.java
+++ b/source/net/yacy/crawler/robots/RobotsTxt.java
@@ -287,7 +287,7 @@ public class RobotsTxt {
         return port;
     }
 
-    static Object[] downloadRobotsTxt(final MultiProtocolURI robotsURL, int redirectionCount, final RobotsTxtEntry entry) throws Exception {
+    protected static Object[] downloadRobotsTxt(final MultiProtocolURI robotsURL, int redirectionCount, final RobotsTxtEntry entry) throws Exception {
         if (robotsURL == null || !robotsURL.getProtocol().startsWith("http")) return null;
 
         if (redirectionCount < 0) return new Object[]{Boolean.FALSE,null,null};
@@ -319,7 +319,7 @@ public class RobotsTxt {
 
         // setup http-client
         //TODO: adding Traffic statistic for robots download?
-        final HTTPClient client = new HTTPClient();
+        final HTTPClient client = new HTTPClient(ClientIdentification.getUserAgent(), ClientIdentification.DEFAULT_TIMEOUT);
         client.setHeader(reqHeaders.entrySet());
         try {
             // check for interruption
diff --git a/source/net/yacy/data/WorkTables.java b/source/net/yacy/data/WorkTables.java
index 91ccde690..38b4edd62 100644
--- a/source/net/yacy/data/WorkTables.java
+++ b/source/net/yacy/data/WorkTables.java
@@ -40,6 +40,7 @@ import net.yacy.cora.date.GenericFormatter;
 import net.yacy.cora.document.ASCII;
 import net.yacy.cora.document.UTF8;
 import net.yacy.cora.order.Base64Order;
+import net.yacy.cora.protocol.ClientIdentification;
 import net.yacy.cora.protocol.http.HTTPClient;
 import net.yacy.cora.storage.HandleSet;
 import net.yacy.cora.util.SpaceExceededException;
@@ -214,7 +215,7 @@ public class WorkTables extends Tables {
      */
     public Map<String, Integer> execAPICalls(String host, int port, String realm, Collection<String> pks) {
         // now call the api URLs and store the result status
-        final HTTPClient client = new HTTPClient();
+        final HTTPClient client = new HTTPClient(ClientIdentification.getUserAgent(), ClientIdentification.DEFAULT_TIMEOUT);
         client.setRealm(realm);
         client.setTimout(120000);
         Tables.Row row;
@@ -246,7 +247,7 @@ public class WorkTables extends Tables {
 
     public static int execAPICall(String host, int port, String realm, String path, byte[] pk) {
         // now call the api URLs and store the result status
-        final HTTPClient client = new HTTPClient();
+        final HTTPClient client = new HTTPClient(ClientIdentification.getUserAgent(), ClientIdentification.DEFAULT_TIMEOUT);
         client.setRealm(realm);
         client.setTimout(120000);
         String url = "http://" + host + ":" + port + path;
diff --git a/source/net/yacy/document/parser/sitemapParser.java b/source/net/yacy/document/parser/sitemapParser.java
index 16f0a8d30..359766e0d 100644
--- a/source/net/yacy/document/parser/sitemapParser.java
+++ b/source/net/yacy/document/parser/sitemapParser.java
@@ -42,7 +42,6 @@ import javax.xml.parsers.DocumentBuilderFactory;
 import net.yacy.cora.date.ISO8601Formatter;
 import net.yacy.cora.document.MultiProtocolURI;
 import net.yacy.cora.protocol.ClientIdentification;
-import net.yacy.cora.protocol.HeaderFramework;
 import net.yacy.cora.protocol.RequestHeader;
 import net.yacy.cora.protocol.ResponseHeader;
 import net.yacy.cora.protocol.http.HTTPClient;
@@ -113,9 +112,7 @@ public class sitemapParser extends AbstractParser implements Parser {
         // download document
         Log.logInfo("SitemapReader", "loading sitemap from " + sitemapURL.toNormalform(true));
         final RequestHeader requestHeader = new RequestHeader();
-        requestHeader.put(HeaderFramework.USER_AGENT, ClientIdentification.getUserAgent());
-        final HTTPClient client = new HTTPClient();
-        client.setTimout(5000);
+        final HTTPClient client = new HTTPClient(ClientIdentification.getUserAgent(), 5000);
         client.setHeader(requestHeader.entrySet());
         try {
             client.GET(sitemapURL.toString());
diff --git a/source/net/yacy/interaction/AugmentHtmlStream.java b/source/net/yacy/interaction/AugmentHtmlStream.java
index 1861b9868..d0793c46a 100644
--- a/source/net/yacy/interaction/AugmentHtmlStream.java
+++ b/source/net/yacy/interaction/AugmentHtmlStream.java
@@ -9,6 +9,7 @@ import java.io.StringReader;
 import java.net.URLEncoder;
 
 import net.yacy.cora.document.ASCII;
+import net.yacy.cora.protocol.ClientIdentification;
 import net.yacy.cora.protocol.Domains;
 import net.yacy.cora.protocol.RequestHeader;
 import net.yacy.cora.protocol.http.HTTPClient;
@@ -31,7 +32,7 @@ public class AugmentHtmlStream {
      * @return the web page with integrated REFLECT elements
      */
     private static String processExternal(String url, String fieldname, String data) throws IOException {
-        final HTTPClient client = new HTTPClient();
+        final HTTPClient client = new HTTPClient(ClientIdentification.getUserAgent(), ClientIdentification.DEFAULT_TIMEOUT);
         try {
             StringBuilder postdata = new StringBuilder();
             postdata.append(fieldname);
diff --git a/source/net/yacy/interaction/Interaction.java b/source/net/yacy/interaction/Interaction.java
index e57f06761..0deba5d29 100644
--- a/source/net/yacy/interaction/Interaction.java
+++ b/source/net/yacy/interaction/Interaction.java
@@ -9,6 +9,7 @@ import java.util.Map;
 import java.util.Set;
 
 import net.yacy.cora.document.UTF8;
+import net.yacy.cora.protocol.ClientIdentification;
 import net.yacy.cora.protocol.HeaderFramework;
 import net.yacy.cora.protocol.RequestHeader;
 import net.yacy.cora.protocol.http.HTTPClient;
@@ -186,7 +187,7 @@ public static String Tableentry(String url, String type, String comment, String
 
 				Seed host = sb.peers.lookupByName(sb.getConfig("interaction.contribution.accumulationpeer", ""));
 
-				return (UTF8.String(new HTTPClient().POSTbytes(
+				return (UTF8.String(new HTTPClient(ClientIdentification.getUserAgent(), ClientIdentification.DEFAULT_TIMEOUT).POSTbytes(
 						"http://"+host.getPublicAddress()+"/interaction/Contribution.json"
 								+ "?url=" + url + "&comment=" + comment
 								+ "&from=" + from + "&peer=" + peer,
diff --git a/source/net/yacy/interaction/contentcontrol/ContentControlImportThread.java b/source/net/yacy/interaction/contentcontrol/ContentControlImportThread.java
index d07d4c630..12173ae29 100644
--- a/source/net/yacy/interaction/contentcontrol/ContentControlImportThread.java
+++ b/source/net/yacy/interaction/contentcontrol/ContentControlImportThread.java
@@ -6,6 +6,7 @@ import java.net.MalformedURLException;
 import java.net.URL;
 
 import net.yacy.cora.document.UTF8;
+import net.yacy.cora.protocol.ClientIdentification;
 import net.yacy.cora.protocol.http.HTTPClient;
 import net.yacy.data.ymark.YMarkEntry;
 import net.yacy.data.ymark.YMarkSMWJSONImporter;
@@ -15,47 +16,31 @@ import net.yacy.search.Switchboard;
 public class ContentControlImportThread {
 
 	private final Switchboard sb;
-
 	private Boolean locked = false;
-
 	private String lastsync = "1900-01-01T01:00:00";
-
 	private String currenttimestamp = "1900-01-01T01:00:00";
-
 	private long offset = 0;
-
 	private final long limit = 500;
-
 	private long currentmax = 0;
-
 	private boolean runningjob = false;
 
 	public ContentControlImportThread(final Switchboard sb) {
-        //final long time = System.currentTimeMillis();
-
         this.sb = sb;
-		if (this.sb.getConfigBool("contentcontrol.smwimport.purgelistoninit",
-				false)) {
-			this.sb.tables.clear(this.sb.getConfig(
-					"contentcontrol.smwimport.targetlist", "contentcontrol"));
+		if (this.sb.getConfigBool("contentcontrol.smwimport.purgelistoninit",false)) {
+			this.sb.tables.clear(this.sb.getConfig("contentcontrol.smwimport.targetlist", "contentcontrol"));
 
 		}
     }
 
 	private final String wikiurlify (String s) {
-
 		String ret = s;
-
 		ret = ret.replace("-", "-2D");
 		ret = ret.replace("+", "-2B");
 		ret = ret.replace(" ", "-20");
-
 		ret = ret.replace("[", "-5B");
 		ret = ret.replace("]", "-5D");
-
 		ret = ret.replace(":", "-3A");
 		ret = ret.replace(">", "-3E");
-
 		ret = ret.replace("?", "-3F");
 
 		return ret;
@@ -64,30 +49,17 @@ public class ContentControlImportThread {
 	public final void run() {
 
 		if (!this.locked) {
-
 			this.locked = true;
-
 			if (this.sb.getConfigBool("contentcontrol.smwimport.enabled", false) == true) {
-
 				if (this.runningjob) {
-
 					Log.logInfo("CONTENTCONTROL",
 							"CONTENTCONTROL importing max. " + this.limit
 									+ " elements at " + this.offset + " of "
 									+ this.currentmax + ", since "
 									+ this.currenttimestamp);
-
 					URL bmks_json;
-
-					//String currenttimestampurl = wikiurlify (this.currenttimestamp);
-
 					try {
-
-						if (!this.sb.getConfig("contentcontrol.smwimport.baseurl",
-								"").equals("")) {
-
-
-
+						if (!this.sb.getConfig("contentcontrol.smwimport.baseurl","").equals("")) {
 							bmks_json = new URL(
 									this.sb.getConfig(
 											"contentcontrol.smwimport.baseurl",
@@ -99,9 +71,7 @@ public class ContentControlImportThread {
 											+ "/offset%3D" + this.offset
 											+ "/limit%3D" + this.limit
 											+ "/format%3Djson");
-
 							this.offset += this.limit;
-
 							if (this.offset > this.currentmax) {
 								this.runningjob = false;
 							}
@@ -111,7 +81,6 @@ public class ContentControlImportThread {
 								reader = new InputStreamReader(
 										bmks_json.openStream(), "UTF-8");
 							} catch (Exception e) {
-
 								Log.logException(e);
 								this.runningjob = false;
 							}
@@ -126,22 +95,14 @@ public class ContentControlImportThread {
 									Log.logException(e);
 									this.runningjob = false;
 								}
-
 								Thread t;
 								YMarkEntry bmk;
-
-								t = new Thread(bookmarkImporter,
-										"YMarks - Network bookmark importer");
+								t = new Thread(bookmarkImporter,"YMarks - Network bookmark importer");
 								t.start();
-
 								while ((bmk = bookmarkImporter.take()) != YMarkEntry.POISON) {
-
 									if (bmk == YMarkEntry.EMPTY) {
-
 										this.runningjob = false;
-
 									} else {
-
 										try {
 											this.sb.tables.bookmarks.addBookmark(
 													this.sb.getConfig("contentcontrol.smwimport.targetlist", "contentcontrol"), bmk,
@@ -153,12 +114,10 @@ public class ContentControlImportThread {
 										}
 									}
 								}
-
 							} else {
 
 							}
 						}
-
 						else {
 
 						}
@@ -167,14 +126,9 @@ public class ContentControlImportThread {
 						// TODO Auto-generated catch block
 						e2.printStackTrace();
 					}
-
 				} else {
-
 					try {
-
-						if (!this.sb.getConfig("contentcontrol.smwimport.baseurl",
-								"").equals("")) {
-
+						if (!this.sb.getConfig("contentcontrol.smwimport.baseurl","").equals("")) {
 							URL bmks_count;
 
 							bmks_count = new URL(
@@ -182,23 +136,16 @@ public class ContentControlImportThread {
 											"contentcontrol.smwimport.baseurl",
 											"")
 											+ wikiurlify ("/[[Category:Web Page]] [[Modification date::>" +this.lastsync+ "]]")
-
-
 											+ wikiurlify ("/?Url/?Filter/?Article has average rating/?Category")
 											+ "/mainlabel%3D"
 											+ "/format%3Dystat");
 
-							String reply = UTF8.String(new HTTPClient()
-									.GETbytes(bmks_count.toString()));
-
+							String reply = UTF8.String(new HTTPClient(ClientIdentification.getUserAgent(), ClientIdentification.DEFAULT_TIMEOUT).GETbytes(bmks_count.toString()));
 							String overallcount = reply.split(",")[0];
-
 							String lastsyncstring = reply.split(",")[1];
-
 							this.currentmax = Integer.parseInt(overallcount);
 
 							if (this.currentmax > 0) {
-
 								Log.logInfo("CONTENTCONTROL",
 										"CONTENTCONTROL import job counts "
 												+ this.currentmax
@@ -216,7 +163,6 @@ public class ContentControlImportThread {
 							Log.logWarning("CONTENTCONTROL",
 									"No SMWimport URL defined");
 						}
-
 					} catch (MalformedURLException e) {
 						// TODO Auto-generated catch block
 						e.printStackTrace();
@@ -224,14 +170,10 @@ public class ContentControlImportThread {
 						// TODO Auto-generated catch block
 						e.printStackTrace();
 					}
-
 				}
-
 				this.locked = false;
-
 			}
 		}
-
 		return;
 	}
 
diff --git a/source/net/yacy/kelondro/workflow/AbstractBusyThread.java b/source/net/yacy/kelondro/workflow/AbstractBusyThread.java
index aa97b5a70..369dadb0f 100644
--- a/source/net/yacy/kelondro/workflow/AbstractBusyThread.java
+++ b/source/net/yacy/kelondro/workflow/AbstractBusyThread.java
@@ -204,14 +204,8 @@ public abstract class AbstractBusyThread extends AbstractThread implements BusyT
 
     // ratzen: German for to sleep (coll.)
     private void ratz(final long millis) {
-        try {/*
-            if (this.syncObject != null) {
-                synchronized (this.syncObject) {
-                    this.syncObject.wait(millis);
-                }
-            } else {*/
-                Thread.sleep(millis);
-            //}
+        try {
+            Thread.sleep(millis);
         } catch (final InterruptedException e) {
             if (log != null)
                 log.logConfig("thread '" + this.getName() + "' interrupted because of shutdown.");
diff --git a/source/net/yacy/peers/SeedDB.java b/source/net/yacy/peers/SeedDB.java
index 04d21f141..ece0b79c1 100644
--- a/source/net/yacy/peers/SeedDB.java
+++ b/source/net/yacy/peers/SeedDB.java
@@ -823,7 +823,7 @@ public final class SeedDB implements AlternativeDomainNames {
         reqHeader.put(HeaderFramework.CACHE_CONTROL, "no-cache"); // httpc uses HTTP/1.0 is this necessary?
         reqHeader.put(HeaderFramework.USER_AGENT, ClientIdentification.getUserAgent());
 
-        final HTTPClient client = new HTTPClient();
+        final HTTPClient client = new HTTPClient(ClientIdentification.getUserAgent(), ClientIdentification.DEFAULT_TIMEOUT);
         client.setHeader(reqHeader.entrySet());
         byte[] content = null;
         try {
diff --git a/source/net/yacy/peers/operation/yacyRelease.java b/source/net/yacy/peers/operation/yacyRelease.java
index 3aac1d55f..ae5a3e302 100644
--- a/source/net/yacy/peers/operation/yacyRelease.java
+++ b/source/net/yacy/peers/operation/yacyRelease.java
@@ -49,8 +49,6 @@ import net.yacy.cora.document.UTF8;
 import net.yacy.cora.federate.yacy.CacheStrategy;
 import net.yacy.cora.order.Base64Order;
 import net.yacy.cora.protocol.ClientIdentification;
-import net.yacy.cora.protocol.HeaderFramework;
-import net.yacy.cora.protocol.RequestHeader;
 import net.yacy.cora.protocol.ResponseHeader;
 import net.yacy.cora.protocol.http.HTTPClient;
 import net.yacy.cora.storage.Files;
@@ -288,16 +286,10 @@ public final class yacyRelease extends yacyVersion {
     public File downloadRelease() {
         final File storagePath = Switchboard.getSwitchboard().releasePath;
         File download = null;
-        // setup httpClient
-        final RequestHeader reqHeader = new RequestHeader();
-        reqHeader.put(HeaderFramework.USER_AGENT, ClientIdentification.getUserAgent());
 
         final String name = getUrl().getFileName();
         byte[] signatureBytes = null;
-
-        final HTTPClient client = new HTTPClient();
-        client.setTimout(6000);
-        client.setHeader(reqHeader.entrySet());
+        final HTTPClient client = new HTTPClient(ClientIdentification.getUserAgent(), ClientIdentification.DEFAULT_TIMEOUT);
 
         // download signature first, if public key is available
         try {
diff --git a/source/net/yacy/search/Switchboard.java b/source/net/yacy/search/Switchboard.java
index 6e405c738..6be9f24d2 100644
--- a/source/net/yacy/search/Switchboard.java
+++ b/source/net/yacy/search/Switchboard.java
@@ -3359,10 +3359,8 @@ public final class Switchboard extends serverSwitch
                     final RequestHeader reqHeader = new RequestHeader();
                     reqHeader.put(HeaderFramework.PRAGMA, "no-cache");
                     reqHeader.put(HeaderFramework.CACHE_CONTROL, "no-cache");
-                    reqHeader.put(HeaderFramework.USER_AGENT, ClientIdentification.getUserAgent());
-                    final HTTPClient client = new HTTPClient();
+                    final HTTPClient client = new HTTPClient(ClientIdentification.getUserAgent(), timeout);
                     client.setHeader(reqHeader.entrySet());
-                    client.setTimout(timeout);
 
                     client.HEADResponse(url.toString());
                     int statusCode = client.getHttpResponse().getStatusLine().getStatusCode();
diff --git a/source/net/yacy/server/http/HTTPDProxyHandler.java b/source/net/yacy/server/http/HTTPDProxyHandler.java
index 95bea1ec0..d15143d39 100644
--- a/source/net/yacy/server/http/HTTPDProxyHandler.java
+++ b/source/net/yacy/server/http/HTTPDProxyHandler.java
@@ -1074,8 +1074,7 @@ public final class HTTPDProxyHandler {
      */
     private static HTTPClient setupHttpClient(final RequestHeader requestHeader, final String connectHost) {
         // setup HTTP-client
-    	final HTTPClient client = new HTTPClient();
-    	client.setTimout(timeout);
+    	final HTTPClient client = new HTTPClient(ClientIdentification.getUserAgent(), timeout);
     	client.setHeader(requestHeader.entrySet());
     	client.setRedirecting(false);
         return client;
diff --git a/source/net/yacy/server/serverSwitch.java b/source/net/yacy/server/serverSwitch.java
index 05898b195..8cac6cdb4 100644
--- a/source/net/yacy/server/serverSwitch.java
+++ b/source/net/yacy/server/serverSwitch.java
@@ -610,7 +610,7 @@ public class serverSwitch
                 try {
                     final RequestHeader reqHeader = new RequestHeader();
                     reqHeader.put(HeaderFramework.USER_AGENT, ClientIdentification.getUserAgent());
-                    final HTTPClient client = new HTTPClient();
+                    final HTTPClient client = new HTTPClient(ClientIdentification.getUserAgent(), ClientIdentification.DEFAULT_TIMEOUT);
                     client.setHeader(reqHeader.entrySet());
                     byte[] data = client.GETbytes(uri);
                     if ( data == null || data.length == 0 ) {
diff --git a/source/net/yacy/yacy.java b/source/net/yacy/yacy.java
index a11f6ce96..7f3ba5547 100644
--- a/source/net/yacy/yacy.java
+++ b/source/net/yacy/yacy.java
@@ -531,7 +531,7 @@ public final class yacy {
         final RequestHeader requestHeader = new RequestHeader();
         requestHeader.put(RequestHeader.AUTHORIZATION, "realm=" + encodedPassword); // for http-authentify
 //        final Client con = new Client(10000, requestHeader);
-        final HTTPClient con = new HTTPClient();
+        final HTTPClient con = new HTTPClient(ClientIdentification.getUserAgent(), ClientIdentification.DEFAULT_TIMEOUT);
         con.setHeader(requestHeader.entrySet());
 //        ResponseContainer res = null;
         try {