diff --git a/source/net/yacy/cora/federate/FederateSearchManager.java b/source/net/yacy/cora/federate/FederateSearchManager.java
index 56f18e9d5..c803fb454 100644
--- a/source/net/yacy/cora/federate/FederateSearchManager.java
+++ b/source/net/yacy/cora/federate/FederateSearchManager.java
@@ -324,7 +324,7 @@ public class FederateSearchManager {
 
         // job to iterate through Solr index to find links to opensearchdescriptions
         // started as background job as connect timeouts may cause it run a long time
-        final Thread job = new Thread() {
+        final Thread job = new Thread(FederateSearchManager.class.getSimpleName() + ".discoverFromSolrIndex") {
             @Override
             public void run() {
                 try {
diff --git a/source/net/yacy/cora/federate/yacy/Peers.java b/source/net/yacy/cora/federate/yacy/Peers.java
index aab72a5eb..490313189 100644
--- a/source/net/yacy/cora/federate/yacy/Peers.java
+++ b/source/net/yacy/cora/federate/yacy/Peers.java
@@ -56,7 +56,7 @@ public class Peers extends TreeMap<byte[], Peer> implements Serializable {
     public void refresh() {
         if (System.currentTimeMillis() - this.lastBootstrap < 60000) return;
         lastBootstrap = System.currentTimeMillis();
-        new Thread() {
+        new Thread("Peers.refresh") {
             @Override
             public void run() {
                 String[] peers = bootstrapList(select(false, false));
@@ -81,7 +81,7 @@ public class Peers extends TreeMap<byte[], Peer> implements Serializable {
             List<Thread> t = new ArrayList<Thread>();
             for (Integer pn: s) {
                 final String bp = peers[pn.intValue()];
-                Thread t0 = new Thread() {
+                Thread t0 = new Thread("Peers.bootstrap-" + bp) {
                     @Override
                     public void run() {
                         Peers ps;
diff --git a/source/net/yacy/crawler/HostBalancer.java b/source/net/yacy/crawler/HostBalancer.java
index 970017c83..323e8d55b 100644
--- a/source/net/yacy/crawler/HostBalancer.java
+++ b/source/net/yacy/crawler/HostBalancer.java
@@ -91,7 +91,7 @@ public class HostBalancer implements Balancer {
      * return immediately (as large unfinished crawls may take longer to load)
      */
     private void init() {
-        Thread t = new Thread() {
+        Thread t = new Thread("HostBalancer.init") {
             @Override
             public void run() {
                 final String[] hostlist = hostsPath.list();
diff --git a/source/net/yacy/crawler/data/Transactions.java b/source/net/yacy/crawler/data/Transactions.java
index 5f97e46ff..c4f84eb1e 100644
--- a/source/net/yacy/crawler/data/Transactions.java
+++ b/source/net/yacy/crawler/data/Transactions.java
@@ -211,6 +211,7 @@ public class Transactions {
             Thread t = new Thread(){
                 @Override
                 public void run() {
+                	this.setName("Transactions.store");
                     executorRunning.incrementAndGet();
                     try {
                         Html2Image.writeWkhtmltopdf(urls, proxy, ClientIdentification.browserAgent.userAgent, acceptLanguage, pdfPath);
diff --git a/source/net/yacy/crawler/retrieval/RSSLoader.java b/source/net/yacy/crawler/retrieval/RSSLoader.java
index 508748e0f..24435d90b 100644
--- a/source/net/yacy/crawler/retrieval/RSSLoader.java
+++ b/source/net/yacy/crawler/retrieval/RSSLoader.java
@@ -63,6 +63,7 @@ public class RSSLoader extends Thread {
     private final ClientIdentification.Agent agent;
 
     public RSSLoader(final Switchboard sb, final DigestURL urlf, final Map<String, Pattern> collections, final ClientIdentification.Agent agent) {
+    	super("RSSLoader(" + urlf != null ? urlf.toNormalform(true) : "" + ")");
         this.sb = sb;
         this.urlf = urlf;
         this.collections = collections;
diff --git a/source/net/yacy/crawler/retrieval/SitemapImporter.java b/source/net/yacy/crawler/retrieval/SitemapImporter.java
index b28e13f11..cd2d20e2b 100644
--- a/source/net/yacy/crawler/retrieval/SitemapImporter.java
+++ b/source/net/yacy/crawler/retrieval/SitemapImporter.java
@@ -47,6 +47,7 @@ public class SitemapImporter extends Thread {
     private final Switchboard sb;
 
     public SitemapImporter(final Switchboard sb, final DigestURL sitemapURL, final CrawlProfile profileEntry) {
+    	super("SitemapImporter(" + sitemapURL != null ? sitemapURL.toNormalform(false) : "" + ")");
         assert sitemapURL != null;
         this.sb = sb;
         this.siteMapURL = sitemapURL;
diff --git a/source/net/yacy/crawler/robots/RobotsTxt.java b/source/net/yacy/crawler/robots/RobotsTxt.java
index 91d5916bc..2d07c403b 100644
--- a/source/net/yacy/crawler/robots/RobotsTxt.java
+++ b/source/net/yacy/crawler/robots/RobotsTxt.java
@@ -384,7 +384,7 @@ public class RobotsTxt {
         final BlockingQueue<CheckEntry> out = new LinkedBlockingQueue<CheckEntry>();
         final Thread[] threads = new Thread[concurrency];
         for (int i = 0; i < concurrency; i++) {
-            threads[i] = new Thread() {
+            threads[i] = new Thread("RobotsTxt.massCrawlCheck-" + i) {
                 @Override
                 public void run() {
                     DigestURL u;
diff --git a/source/net/yacy/data/DidYouMean.java b/source/net/yacy/data/DidYouMean.java
index eea995d9e..f60ee1e81 100644
--- a/source/net/yacy/data/DidYouMean.java
+++ b/source/net/yacy/data/DidYouMean.java
@@ -399,6 +399,11 @@ public class DidYouMean {
      * <b>Note:</b> the loop runs (alphabet.length * len) tests.
      */
     public class ChangingOneLetter extends Thread {
+    	
+    	public ChangingOneLetter() {
+    		super("ChangingOneLetter");
+    	}
+    	
         @Override
         public void run() {
             char m;
@@ -421,6 +426,10 @@ public class DidYouMean {
      * <b>Note:</b> the loop runs (len) tests.
      */
 	private class DeletingOneLetter extends Thread {
+		public DeletingOneLetter() {
+			super("DeletingOneLetter");
+		}
+		
         @Override
         public void run() {
             for (int i = 0; i < DidYouMean.this.wordLen; i++) {
@@ -437,6 +446,10 @@ public class DidYouMean {
      * <b>Note:</b> the loop runs (alphabet.length * len) tests.
      */
 	private class AddingOneLetter extends Thread {
+		public AddingOneLetter() {
+			super("AddingOneLetter");
+		}
+		
         @Override
         public void run() {
             for (int i = 0; i <= DidYouMean.this.wordLen; i++) {
@@ -455,6 +468,10 @@ public class DidYouMean {
      * <b>Note:</b> the loop runs (len-1) tests.
      */
 	private class ReversingTwoConsecutiveLetters extends Thread {
+		public ReversingTwoConsecutiveLetters() {
+			super("ReversingTwoConsecutiveLetters");
+		}
+		
         @Override
         public void run() {
             for (int i = 0; i < DidYouMean.this.wordLen - 1; i++) {
diff --git a/source/net/yacy/document/importer/MediawikiImporter.java b/source/net/yacy/document/importer/MediawikiImporter.java
index 8dc14e29a..e42a2efb3 100644
--- a/source/net/yacy/document/importer/MediawikiImporter.java
+++ b/source/net/yacy/document/importer/MediawikiImporter.java
@@ -95,6 +95,7 @@ public class MediawikiImporter extends Thread implements Importer {
 
 
     public MediawikiImporter(final File sourcefile, final File targetdir) {
+    	super("MediawikiImporter(" + sourcefile != null ? sourcefile.getAbsolutePath() : "null sourcefile" +")");
     	this.sourcefile = sourcefile;
     	this.docsize = sourcefile.length();
     	this.approxdocs = (int) (this.docsize * docspermbinxmlbz2 / 1024L / 1024L);
@@ -296,7 +297,9 @@ public class MediawikiImporter extends Thread implements Importer {
     public static class indexMaker extends Thread {
 
         File mediawikixml;
+        
         public indexMaker(final File mediawikixml) {
+        	super("MediawikiImporter.indexMaker " + mediawikixml != null ? mediawikixml.getName() : "");
             this.mediawikixml = mediawikixml;
         }
 
diff --git a/source/net/yacy/document/importer/OAIPMHImporter.java b/source/net/yacy/document/importer/OAIPMHImporter.java
index 8c8885e5e..5f4a8c3ca 100644
--- a/source/net/yacy/document/importer/OAIPMHImporter.java
+++ b/source/net/yacy/document/importer/OAIPMHImporter.java
@@ -62,6 +62,7 @@ public class OAIPMHImporter extends Thread implements Importer, Comparable<OAIPM
     private final ClientIdentification.Agent agent;
 
     public OAIPMHImporter(final LoaderDispatcher loader, final ClientIdentification.Agent agent, final DigestURL source) {
+    	super(OAIPMHImporter.class.getSimpleName());
         this.agent = agent;
         this.serialNumber = importerCounter--;
         this.loader = loader;
diff --git a/source/net/yacy/document/parser/sitemapParser.java b/source/net/yacy/document/parser/sitemapParser.java
index 9ea66ddb5..383a0f8e0 100644
--- a/source/net/yacy/document/parser/sitemapParser.java
+++ b/source/net/yacy/document/parser/sitemapParser.java
@@ -151,6 +151,7 @@ public class sitemapParser extends AbstractParser implements Parser {
         private final BlockingQueue<URLEntry> queue;
         private final ClientIdentification.Agent agent;
         public SitemapReader(final InputStream source, final ClientIdentification.Agent agent) {
+        	super(SitemapReader.class.getSimpleName());
             this.source = source;
             this.queue = new ArrayBlockingQueue<URLEntry>(10000);
             this.agent = agent;
diff --git a/source/net/yacy/gui/Tray.java b/source/net/yacy/gui/Tray.java
index f3c83dded..30904b54d 100644
--- a/source/net/yacy/gui/Tray.java
+++ b/source/net/yacy/gui/Tray.java
@@ -125,6 +125,11 @@ public final class Tray {
 	}
 	
 	private class TrayAnimation extends Thread {
+		
+		public TrayAnimation() {
+			super(TrayAnimation.class.getSimpleName());
+		}
+		
 	    int ic = 0;
 	    @Override
         public void run() {
diff --git a/source/net/yacy/gui/framework/Switchboard.java b/source/net/yacy/gui/framework/Switchboard.java
index a15397e55..f50275545 100644
--- a/source/net/yacy/gui/framework/Switchboard.java
+++ b/source/net/yacy/gui/framework/Switchboard.java
@@ -81,6 +81,7 @@ public class Switchboard {
     public static class InfoUpdater extends Thread {
         long steptime;
         public InfoUpdater(long steptime) {
+        	super("Switchboard.InfoUpdater");
             this.steptime = steptime;
         }
         @Override
@@ -105,7 +106,7 @@ public class Switchboard {
         private final Semaphore shutdownSemaphore;
 
         public shutdownHookThread(final Thread mainThread, Semaphore semaphore) {
-            super();
+            super("Switchboard.shutdownHookThread");
             this.mainThread = mainThread;
             this.shutdownSemaphore = semaphore;
         }
diff --git a/source/net/yacy/http/AbstractRemoteHandler.java b/source/net/yacy/http/AbstractRemoteHandler.java
index e9bbf9819..c5cd3cbe2 100644
--- a/source/net/yacy/http/AbstractRemoteHandler.java
+++ b/source/net/yacy/http/AbstractRemoteHandler.java
@@ -62,7 +62,7 @@ abstract public class AbstractRemoteHandler extends ConnectHandler implements Ha
 
         // Add some other known local host names
         // The remote DNS sometimes takes very long when it is waiting for timeout, therefore we do this concurrently
-        new Thread() {
+        new Thread(AbstractRemoteHandler.class.getSimpleName() + ".doStart") {
             @Override
             public void run() {
                 for (InetAddress localInetAddress : Domains.myPublicIPv4()) {
diff --git a/source/net/yacy/http/servlets/YaCyDefaultServlet.java b/source/net/yacy/http/servlets/YaCyDefaultServlet.java
index 567025d0d..6fedbee00 100644
--- a/source/net/yacy/http/servlets/YaCyDefaultServlet.java
+++ b/source/net/yacy/http/servlets/YaCyDefaultServlet.java
@@ -1223,7 +1223,7 @@ public class YaCyDefaultServlet extends HttpServlet  {
                 Thread[] p = new Thread[t];
                 for (int j = 0; j < t; j++) {
                     files.put(POISON);
-                    p[j] = new Thread() {
+                    p[j] = new Thread("YaCyDefaultServlet.parseMultipart-" + j) {
                         @Override
                         public void run() {
                             Map.Entry<String, byte[]> job;
diff --git a/source/net/yacy/kelondro/data/word/WordReferenceVars.java b/source/net/yacy/kelondro/data/word/WordReferenceVars.java
index 54796ee70..e15a74f92 100644
--- a/source/net/yacy/kelondro/data/word/WordReferenceVars.java
+++ b/source/net/yacy/kelondro/data/word/WordReferenceVars.java
@@ -503,6 +503,7 @@ public class WordReferenceVars extends AbstractReference implements WordReferenc
     	private long maxtime;
     	private final boolean local;
     	private TransformDistributor(final ReferenceContainer<WordReference> container, final BlockingQueue<WordReferenceVars> out, final long maxtime, final boolean local) {
+    		super("WordReferenceVars.TransformDistributor");
     		this.container = container;
     		this.out = out;
     		this.maxtime = maxtime;
@@ -556,6 +557,7 @@ public class WordReferenceVars extends AbstractReference implements WordReferenc
     	private final boolean local;
 
     	private TransformWorker(final BlockingQueue<WordReferenceVars> out, final long maxtime, final boolean local) {
+    		super("WordReferenceVars.TransformWorker");
     		this.in = new LinkedBlockingQueue<Row.Entry>();
     		this.out = out;
     		this.maxtime = maxtime;
diff --git a/source/net/yacy/kelondro/util/ConsoleInterface.java b/source/net/yacy/kelondro/util/ConsoleInterface.java
index d7d879926..d28838c00 100644
--- a/source/net/yacy/kelondro/util/ConsoleInterface.java
+++ b/source/net/yacy/kelondro/util/ConsoleInterface.java
@@ -43,6 +43,7 @@ public class ConsoleInterface extends Thread {
     
 
     private ConsoleInterface(final InputStream stream, final ConcurrentLog log) {
+    	super("ConsoleInterface");
         this.log = log;
         this.stream = stream;
         // block reading {@see getOutput()}
diff --git a/source/net/yacy/kelondro/util/FileUtils.java b/source/net/yacy/kelondro/util/FileUtils.java
index ebb135567..7f1acfff5 100644
--- a/source/net/yacy/kelondro/util/FileUtils.java
+++ b/source/net/yacy/kelondro/util/FileUtils.java
@@ -965,7 +965,7 @@ public final class FileUtils {
      * @param concurrent if this shall run concurrently
      */
     public static void checkCharset(final File file, final String givenCharset, final boolean concurrent) {
-        Thread t = new Thread() {
+        Thread t = new Thread("FileUtils.checkCharset") {
             @Override
             public void run() {
                 try {
diff --git a/source/net/yacy/peers/Protocol.java b/source/net/yacy/peers/Protocol.java
index 01938443e..ccd7bae3c 100644
--- a/source/net/yacy/peers/Protocol.java
+++ b/source/net/yacy/peers/Protocol.java
@@ -821,6 +821,7 @@ public final class Protocol {
     	 * @param storeDocs solr documents collection to put to segment
     	 */
     	public WriteMetadataNodeToLocalIndexThread(Segment segment, Collection<URIMetadataNode> storeDocs) {
+    		super("WriteMetadataNodeToLocalIndexThread");
     		this.segment = segment;
     		this.storeDocs = storeDocs;
     	}
@@ -1282,6 +1283,7 @@ public final class Protocol {
     	 * @param docs solr documents collection to put to segment
     	 */
     	public WriteToLocalIndexThread(Segment segment, Collection<SolrInputDocument> docs) {
+    		super("WriteToLocalIndexThread");
     		this.segment = segment;
     		this.docs = docs;
     	}
diff --git a/source/net/yacy/peers/SeedDB.java b/source/net/yacy/peers/SeedDB.java
index bec3a4f62..4a00c3f9e 100644
--- a/source/net/yacy/peers/SeedDB.java
+++ b/source/net/yacy/peers/SeedDB.java
@@ -1098,7 +1098,7 @@ public final class SeedDB implements AlternativeDomainNames {
     public void loadSeedListConcurrently(final String seedListFileURL, final AtomicInteger scc, final int timeout, final boolean checkAge) {
         // uses the superseed to initialize the database with known seeds
 
-        Thread seedLoader = new Thread() {
+        Thread seedLoader = new Thread("SeedDB.loadSeedListConcurrently") {
             @Override
             public void run() {
                 // load the seed list
diff --git a/source/net/yacy/peers/graphics/OSMTile.java b/source/net/yacy/peers/graphics/OSMTile.java
index ba8152e32..ecb240e9c 100644
--- a/source/net/yacy/peers/graphics/OSMTile.java
+++ b/source/net/yacy/peers/graphics/OSMTile.java
@@ -82,6 +82,7 @@ public class OSMTile {
         RasterPlotter m;
         int xt, yt, xc, yc, z;
         public Place(final RasterPlotter m, final int xt, final int yt, final int xc, final int yc, final int z) {
+        	super("OSMTile.Place(" + xt + "," + yt+ ")");
             this.m = m; this.xt = xt; this.yt = yt; this.xc = xc; this.yc = yc; this.z = z;
         }
         @Override
diff --git a/source/net/yacy/repository/LoaderDispatcher.java b/source/net/yacy/repository/LoaderDispatcher.java
index e606d43bc..1909178a9 100644
--- a/source/net/yacy/repository/LoaderDispatcher.java
+++ b/source/net/yacy/repository/LoaderDispatcher.java
@@ -610,6 +610,7 @@ public final class LoaderDispatcher {
         private final ClientIdentification.Agent agent;
 
         public Loader(final DigestURL url, final File cache, final int maxFileSize, final CacheStrategy cacheStrategy, BlacklistType blacklistType, final ClientIdentification.Agent agent) {
+        	super("LoaderDispatcher.Loader");
             this.url = url;
             this.cache = cache;
             this.maxFileSize = maxFileSize;
diff --git a/source/net/yacy/search/Shutdown.java b/source/net/yacy/search/Shutdown.java
index 3d18c4125..099c443a4 100644
--- a/source/net/yacy/search/Shutdown.java
+++ b/source/net/yacy/search/Shutdown.java
@@ -28,6 +28,7 @@ public class Shutdown extends Thread {
     private final String reason;
 
     public Shutdown(final Switchboard sb, final long delay, final String reason) {
+    	super(Shutdown.class.getSimpleName());
         this.sb = sb;
         this.delay = delay;
         this.reason = reason;
diff --git a/source/net/yacy/search/Switchboard.java b/source/net/yacy/search/Switchboard.java
index 3ff8c747b..fe9989f12 100644
--- a/source/net/yacy/search/Switchboard.java
+++ b/source/net/yacy/search/Switchboard.java
@@ -2045,7 +2045,7 @@ public final class Switchboard extends serverSwitch {
         assert this.crawlStacker != null;
         Thread[] indexer = new Thread[concurrency];
         for (int t = 0; t < concurrency; t++) {
-            indexer[t] = new Thread() {
+            indexer[t] = new Thread("Switchboard.processSurrogate-" + t) {
                 @Override
                 public void run() {
                     VocabularyScraper scraper = new VocabularyScraper();
@@ -3145,6 +3145,7 @@ public final class Switchboard extends serverSwitch {
             Thread t = new Thread() {
                 @Override
                 public void run() {
+                	this.setName("Switchboard.stackURLs");
                     String failreason;
                     if ((failreason = Switchboard.this.stackUrl(profile, turl)) == null) successurls.add(turl); else failurls.put(turl, failreason);
                 }
@@ -3745,7 +3746,7 @@ public final class Switchboard extends serverSwitch {
      * @param resulturl the result doc which outbound links to add to crawler
      */
     public final void heuristicSearchResults(final URIMetadataNode resulturl) {
-        new Thread() {
+        new Thread("Switchboard.heuristicSearchResults") {
 
             @Override
             public void run() {
diff --git a/source/net/yacy/search/index/ErrorCacheFiller.java b/source/net/yacy/search/index/ErrorCacheFiller.java
index a4ba0a262..1e386473d 100644
--- a/source/net/yacy/search/index/ErrorCacheFiller.java
+++ b/source/net/yacy/search/index/ErrorCacheFiller.java
@@ -51,6 +51,7 @@ public class ErrorCacheFiller extends Thread {
 	 * @param cache error cache to fill. Must not be null.
 	 */
 	public ErrorCacheFiller(Switchboard sb, ErrorCache cache) {
+		super(ErrorCacheFiller.class.getSimpleName());
 		if(sb == null || cache == null) {
 			throw new IllegalArgumentException("Unexpected null parameters");
 		}
diff --git a/source/net/yacy/search/index/Fulltext.java b/source/net/yacy/search/index/Fulltext.java
index a6132860a..76669dafa 100644
--- a/source/net/yacy/search/index/Fulltext.java
+++ b/source/net/yacy/search/index/Fulltext.java
@@ -714,6 +714,7 @@ public final class Fulltext {
         private final boolean dom, text;
 
         private Export(final File f, final String filter, final String query, final ExportFormat format, final boolean dom, final boolean text) {
+        	super("Fulltext.Export");
             // format: 0=text, 1=html, 2=rss/xml
             this.f = f;
             this.pattern = filter == null ? null : Pattern.compile(filter);
diff --git a/source/net/yacy/search/query/AccessTracker.java b/source/net/yacy/search/query/AccessTracker.java
index 7f8587e03..0753bf224 100644
--- a/source/net/yacy/search/query/AccessTracker.java
+++ b/source/net/yacy/search/query/AccessTracker.java
@@ -188,7 +188,7 @@ public class AccessTracker {
         while (!remoteSearches.isEmpty()) {
             addToDump(remoteSearches.removeFirst(), 0);
         }
-        Thread t = new Thread() {
+        Thread t = new Thread("AccessTracker.dumpLog") {
             @Override
             public void run() {
                 ArrayList<String> logCopy = new ArrayList<String>();
diff --git a/source/net/yacy/search/query/SearchEvent.java b/source/net/yacy/search/query/SearchEvent.java
index 96e241fde..bac4d5794 100644
--- a/source/net/yacy/search/query/SearchEvent.java
+++ b/source/net/yacy/search/query/SearchEvent.java
@@ -462,7 +462,7 @@ public final class SearchEvent {
         final Thread waitForThread;
         
         public RWIProcess(final Thread waitForThread) {
-            super();
+            super("SearchEvent.RWIProcess(" + waitForThread != null ? waitForThread.getName() : "" + ")");
             this.waitForThread = waitForThread;
         }
         
@@ -1389,7 +1389,7 @@ public final class SearchEvent {
                     success = true;
                 } else {
 
-                    new Thread() {
+                    new Thread("SearchEvent.drainStacksToResult.getSnippet") {
                         @Override
                         public void run() {
                             SearchEvent.this.oneFeederStarted();
diff --git a/source/net/yacy/search/query/SecondarySearchSuperviser.java b/source/net/yacy/search/query/SecondarySearchSuperviser.java
index 822c43087..ecabd5b53 100644
--- a/source/net/yacy/search/query/SecondarySearchSuperviser.java
+++ b/source/net/yacy/search/query/SecondarySearchSuperviser.java
@@ -27,6 +27,7 @@ public class SecondarySearchSuperviser extends Thread {
     private final SearchEvent searchEvent;
 
     protected SecondarySearchSuperviser(SearchEvent searchEvent) {
+    	super("SecondarySearchSuperviser");
         this.abstractsCache = Collections.synchronizedSortedMap(new TreeMap<String, SortedMap<String, Set<String>>>());
         this.checkedPeers = Collections.synchronizedSortedSet(new TreeSet<String>());
         this.trigger = new Semaphore(0);
@@ -50,7 +51,7 @@ public class SecondarySearchSuperviser extends Thread {
         new Thread() {
             @Override
             public void run() {
-                Thread.currentThread().setName("SearchEvent.addAbstract:" + wordhash);
+                Thread.currentThread().setName("SecondarySearch.addAbstract:" + wordhash);
                 for ( final Map.Entry<String, Set<String>> oneref : singleAbstract.entrySet() ) {
                     final String urlhash = oneref.getKey();
                     final Set<String> peerlistNew = oneref.getValue();
diff --git a/source/net/yacy/search/ranking/BlockRank.java b/source/net/yacy/search/ranking/BlockRank.java
index 6311e6b25..04371664f 100644
--- a/source/net/yacy/search/ranking/BlockRank.java
+++ b/source/net/yacy/search/ranking/BlockRank.java
@@ -89,6 +89,7 @@ public class BlockRank {
         Seed seed;
 
         public IndexRetrieval(final ReferenceContainerCache<HostReference> index, final Seed seed) {
+        	super("BlockRank.IndexRetrieval");
             this.index = index;
             this.seed = seed;
         }
diff --git a/source/net/yacy/search/ranking/ReferenceOrder.java b/source/net/yacy/search/ranking/ReferenceOrder.java
index 5e95f7dac..3663e5dfd 100644
--- a/source/net/yacy/search/ranking/ReferenceOrder.java
+++ b/source/net/yacy/search/ranking/ReferenceOrder.java
@@ -87,6 +87,7 @@ public class ReferenceOrder {
         private final boolean local;
         
         public NormalizeDistributor(final ReferenceContainer<WordReference> container, final LinkedBlockingQueue<WordReferenceVars> out, final int threads, final long maxtime, final boolean local) {
+        	super("ReferenceOrder.NormalizeDistributor");
             this.container = container;
             this.out = out;
             this.threads = threads;
@@ -144,6 +145,7 @@ public class ReferenceOrder {
         private final long maxtime;
 
         public NormalizeWorker(final BlockingQueue<WordReferenceVars> out, final Semaphore termination, long maxtime) {
+        	super("ReferenceOrder.NormalizeWorker");
             this.out = out;
             this.termination = termination;
             this.decodedEntries = new LinkedBlockingQueue<WordReferenceVars>();
diff --git a/source/net/yacy/utils/loaderThreads.java b/source/net/yacy/utils/loaderThreads.java
index f53481dbc..0711f2eef 100644
--- a/source/net/yacy/utils/loaderThreads.java
+++ b/source/net/yacy/utils/loaderThreads.java
@@ -109,6 +109,7 @@ public class loaderThreads {
         final ClientIdentification.Agent agent;
 
         public loaderThread(final DigestURL url, final loaderProcess process, final ClientIdentification.Agent agent) {
+        	super("loaderThreads.loaderThread");
             this.url = url;
             this.process = process;
             this.error = null;
diff --git a/source/net/yacy/yacy.java b/source/net/yacy/yacy.java
index 4813f00f6..b3a8343b0 100644
--- a/source/net/yacy/yacy.java
+++ b/source/net/yacy/yacy.java
@@ -421,7 +421,7 @@ public final class yacy {
 		final String iframesource = switchBoard.getConfig("donation.iframesource", "");
 		final String iframetarget = switchBoard.getConfig("donation.iframetarget", "");
 		final File iframefile = new File(htDocsDirectory, iframetarget);
-		if (!iframefile.exists()) new Thread() {
+		if (!iframefile.exists()) new Thread("yacy.importDonationIFrame") {
 		    @Override
 		    public void run() {
 		        final ClientIdentification.Agent agent = ClientIdentification.getAgent(ClientIdentification.yacyInternetCrawlerAgentName);
@@ -788,7 +788,7 @@ class shutdownHookThread extends Thread {
     private final Thread mainThread;
 
     public shutdownHookThread(final Thread mainThread, final Switchboard sb) {
-        super();
+        super("yacy.shutdownHookThread");
         this.sb = sb;
         this.mainThread = mainThread;
     }