diff --git a/source/de/anomic/http/server/HTTPDFileHandler.java b/source/de/anomic/http/server/HTTPDFileHandler.java
index 68782c458..88327025b 100644
--- a/source/de/anomic/http/server/HTTPDFileHandler.java
+++ b/source/de/anomic/http/server/HTTPDFileHandler.java
@@ -1284,13 +1284,7 @@ public final class HTTPDFileHandler {
 		requestHeader.put(HeaderFramework.HOST, proxyurl.getHost());
 
 		ByteArrayOutputStream o = new ByteArrayOutputStream();
-
 		HTTPDProxyHandler.doGet(prop, requestHeader, o);
-		//System.err.println(prop.getProperty(HeaderFramework.CONNECTION_PROP_PROXY_RESPOND_STATUS));
-		if (o == null) {
-			HTTPDemon.sendRespondError(conProp,out,3,404,"File not Found",null,null);
-			return;
-		}
 
 		// reparse header to extract content-length and mimetype
 		final ResponseHeader outgoingHeader = new ResponseHeader();
diff --git a/source/de/anomic/yacy/yacySeedDB.java b/source/de/anomic/yacy/yacySeedDB.java
index b07bda6a2..413e695be 100644
--- a/source/de/anomic/yacy/yacySeedDB.java
+++ b/source/de/anomic/yacy/yacySeedDB.java
@@ -1011,8 +1011,7 @@ public final class yacySeedDB implements AlternativeDomainNames {
             return (nextSeed != null);
         }
         
-        @SuppressWarnings("unchecked")
-		private yacySeed internalNext() {
+        private yacySeed internalNext() {
             if (it == null || !(it.hasNext())) return null;
             try {
                 Map<String, String> dna0;
diff --git a/source/net/yacy/cora/storage/OrderedScoreMap.java b/source/net/yacy/cora/storage/OrderedScoreMap.java
index f178cb1cf..61ccce30b 100644
--- a/source/net/yacy/cora/storage/OrderedScoreMap.java
+++ b/source/net/yacy/cora/storage/OrderedScoreMap.java
@@ -185,8 +185,7 @@ public class OrderedScoreMap<E> implements ScoreMap<E> {
         return score.intValue();
     }
     
-    @SuppressWarnings("unchecked")
-	public SortedMap<E, IntScore> tailMap(E obj) {
+    public SortedMap<E, IntScore> tailMap(E obj) {
         if (this.map instanceof TreeMap) {
             return ((TreeMap<E, IntScore>) this.map).tailMap(obj);
         }
@@ -248,8 +247,7 @@ public class OrderedScoreMap<E> implements ScoreMap<E> {
         return map.toString();
     }
 
-    @SuppressWarnings("unchecked")
-	public Iterator<E> keys(boolean up) {
+    public Iterator<E> keys(boolean up) {
         synchronized (this) {
             // re-organize entries
             TreeMap<IntScore, Set<E>> m = new TreeMap<IntScore, Set<E>>();
diff --git a/source/net/yacy/document/parser/pdfParser.java b/source/net/yacy/document/parser/pdfParser.java
index 858c45f93..170aee55d 100644
--- a/source/net/yacy/document/parser/pdfParser.java
+++ b/source/net/yacy/document/parser/pdfParser.java
@@ -77,7 +77,6 @@ public class pdfParser extends AbstractParser implements Parser {
             //pdfParser.parse();
             //pdfDoc = pdfParser.getPDDocument();
         } catch (IOException e) {
-            if (pdfDoc != null) try {pdfDoc.close();} catch (IOException ee) {}
             throw new Parser.Failure(e.getMessage(), location);
         } finally {
             Thread.currentThread().setPriority(Thread.NORM_PRIORITY);
diff --git a/source/net/yacy/kelondro/data/image/ImageReferenceRow.java b/source/net/yacy/kelondro/data/image/ImageReferenceRow.java
index 5a1c200ab..500dbb23f 100644
--- a/source/net/yacy/kelondro/data/image/ImageReferenceRow.java
+++ b/source/net/yacy/kelondro/data/image/ImageReferenceRow.java
@@ -91,8 +91,8 @@ public final class ImageReferenceRow extends AbstractReference implements /*Imag
     private static final int col_urlComps      = 11; // n  1 number of path components
 
     // dynamic properties
-    private static final int col_rgbaverage    = 12; // g  6 an average of the RGB values
-    private static final int col_typeofimage   = 12; // g  4 classification
+    //private static final int col_rgbaverage    = 12; // g  6 an average of the RGB values
+    //private static final int col_typeofimage   = 12; // g  4 classification
     private static final int col_flags         = 13; // z  4 b64-encoded appearance flags (24 bit, see definition below)
     private static final int col_hitcount      = 14; // c  1 number of occurrences of this word in text
     private static final int col_posintext     = 15; // t  2 first appearance of word in text
diff --git a/source/net/yacy/kelondro/rwi/IODispatcher.java b/source/net/yacy/kelondro/rwi/IODispatcher.java
index b99ce3142..a4e54cc2b 100644
--- a/source/net/yacy/kelondro/rwi/IODispatcher.java
+++ b/source/net/yacy/kelondro/rwi/IODispatcher.java
@@ -85,6 +85,7 @@ public class IODispatcher extends Thread {
             Log.logWarning("IODispatcher", "emergency dump of file " + file.getName());
              if (!cache.isEmpty()) cache.dump(file, (int) Math.min(MemoryControl.available() / 3, writeBufferSize), true);
         } else {
+            @SuppressWarnings("rawtypes")
             DumpJob<? extends Reference> job = new DumpJob(cache, file, array);
             try {
                 // check if the dispatcher is running
@@ -214,7 +215,7 @@ public class IODispatcher extends Thread {
         }
     }
     
-    private class DumpJob <ReferenceType extends Reference> {
+    private class DumpJob<ReferenceType extends Reference> {
         private ReferenceContainerCache<ReferenceType> cache;
         private File file;
         private ReferenceContainerArray<ReferenceType> array;
diff --git a/source/net/yacy/kelondro/util/FileUtils.java b/source/net/yacy/kelondro/util/FileUtils.java
index 23bd04c98..295aa02c9 100644
--- a/source/net/yacy/kelondro/util/FileUtils.java
+++ b/source/net/yacy/kelondro/util/FileUtils.java
@@ -814,8 +814,7 @@ public final class FileUtils {
         }
     }    
 
-    @SuppressWarnings("unchecked")
-	public static final File createTempFile(Class classObj, final String name) throws IOException {
+    public static final File createTempFile(Class<?> classObj, final String name) throws IOException {
         String parserClassName = classObj.getName();
         int idx = parserClassName.lastIndexOf('.');
         if (idx != -1) {