diff --git a/source/net/yacy/cora/document/id/MultiProtocolURL.java b/source/net/yacy/cora/document/id/MultiProtocolURL.java
index 92ab41a52..e9a46fc91 100644
--- a/source/net/yacy/cora/document/id/MultiProtocolURL.java
+++ b/source/net/yacy/cora/document/id/MultiProtocolURL.java
@@ -2553,8 +2553,14 @@ public class MultiProtocolURL implements Serializable, Comparable<MultiProtocolU
     }
 
     public byte[] get(final ClientIdentification.Agent agent, final String username, final String pass) throws IOException {
-        if (isFile()) return read(new FileInputStream(getFSFile()));
-        if (isSMB()) return read(new SmbFileInputStream(getSmbFile()));
+        if (isFile()) {
+        	byte[] b = read(new FileInputStream(getFSFile()));
+        	return b;
+        }
+        if (isSMB()) {
+        	byte[] b = read(new SmbFileInputStream(getSmbFile()));
+        	return b;
+        }
         if (isFTP()) {
             final FTPClient client = new FTPClient();
             client.open(this.host, this.port < 0 ? 21 : this.port);
diff --git a/source/net/yacy/cora/geo/GeonamesLocation.java b/source/net/yacy/cora/geo/GeonamesLocation.java
index f39724215..f7cd1abfe 100644
--- a/source/net/yacy/cora/geo/GeonamesLocation.java
+++ b/source/net/yacy/cora/geo/GeonamesLocation.java
@@ -94,6 +94,7 @@ public class GeonamesLocation implements Locations {
             final ZipEntry ze = zf.getEntry(entryName);
             final InputStream is = zf.getInputStream(ze);
             reader = new BufferedReader(new InputStreamReader(is, StandardCharsets.UTF_8));
+            zf.close();
         } catch (final IOException e ) {
             log.warn(e);
             return;
diff --git a/source/net/yacy/cora/plugin/ClassProvider.java b/source/net/yacy/cora/plugin/ClassProvider.java
index 988631067..a8b02a535 100644
--- a/source/net/yacy/cora/plugin/ClassProvider.java
+++ b/source/net/yacy/cora/plugin/ClassProvider.java
@@ -25,8 +25,8 @@
 package net.yacy.cora.plugin;
 
 import java.io.File;
+import java.io.IOException;
 import java.lang.reflect.Method;
-import java.net.MalformedURLException;
 import java.net.URL;
 import java.net.URLClassLoader;
 
@@ -47,11 +47,12 @@ public class ClassProvider {
             URL[] urls;
             try {
                 urls = new URL[]{new URL("file", "", path)};
-                final ClassLoader cl = new URLClassLoader(urls);
+                final URLClassLoader cl = new URLClassLoader(urls);
                 c = cl.loadClass(classname);
-            } catch (final MalformedURLException e) {
-            } catch (final ClassNotFoundException e) {
-            }
+                cl.close();
+            } catch (ClassNotFoundException | IOException e) {
+				e.printStackTrace();
+			}
         }
         return c;
     }
diff --git a/source/net/yacy/cora/protocol/TimeoutRequest.java b/source/net/yacy/cora/protocol/TimeoutRequest.java
index 8b57e07a7..b4485fa0c 100644
--- a/source/net/yacy/cora/protocol/TimeoutRequest.java
+++ b/source/net/yacy/cora/protocol/TimeoutRequest.java
@@ -135,6 +135,7 @@ public class TimeoutRequest<E> {
                             return Boolean.TRUE;
                         }
                         //System.out.println("PING socket close = " + (System.currentTimeMillis() - time) + " ms (" + host + ":" + port + ")"); time = System.currentTimeMillis();
+                        socket.close();
                         return Boolean.FALSE;
                     } catch (final UnknownHostException e) {
                         //System.out.println("PING socket UnknownHostException = " + (System.currentTimeMillis() - time) + " ms (" + host + ":" + port + ")"); time = System.currentTimeMillis();
diff --git a/source/net/yacy/cora/protocol/http/HTTPClient.java b/source/net/yacy/cora/protocol/http/HTTPClient.java
index abb583f80..0ca7eda55 100644
--- a/source/net/yacy/cora/protocol/http/HTTPClient.java
+++ b/source/net/yacy/cora/protocol/http/HTTPClient.java
@@ -1105,8 +1105,9 @@ public class HTTPClient implements Closeable {
 //		}
         // Close out connection manager
         try {
-                HTTPClient.closeConnectionManager();
-        } catch (final InterruptedException e) {
+        	client.close();
+            HTTPClient.closeConnectionManager();
+        } catch (final InterruptedException | IOException e) {
                 e.printStackTrace();
         }
     }
diff --git a/source/net/yacy/cora/storage/ZIPReader.java b/source/net/yacy/cora/storage/ZIPReader.java
index ced9dfd76..8062be533 100644
--- a/source/net/yacy/cora/storage/ZIPReader.java
+++ b/source/net/yacy/cora/storage/ZIPReader.java
@@ -138,5 +138,6 @@ public class ZIPReader extends AbstractMap<String, ZipEntry> implements Map<Stri
                 }
             }
         }
+        zfile.close();
     }
 }
diff --git a/source/net/yacy/document/LibraryProvider.java b/source/net/yacy/document/LibraryProvider.java
index 0b8a202db..9b4223c01 100644
--- a/source/net/yacy/document/LibraryProvider.java
+++ b/source/net/yacy/document/LibraryProvider.java
@@ -282,6 +282,7 @@ public class LibraryProvider {
         try {
             final ZipFile zip = new ZipFile(file);
             derewoTxtEntry = zip.getInputStream(zip.getEntry("derewo-v-100000t-2009-04-30-0.1"));
+            zip.close();
         } catch (final ZipException e ) {
             ConcurrentLog.logException(e);
             return list;
diff --git a/source/net/yacy/document/importer/MediawikiImporter.java b/source/net/yacy/document/importer/MediawikiImporter.java
index 4e993d79c..d6dbb5b83 100644
--- a/source/net/yacy/document/importer/MediawikiImporter.java
+++ b/source/net/yacy/document/importer/MediawikiImporter.java
@@ -153,7 +153,8 @@ public class MediawikiImporter extends Thread implements Importer {
         return (System.currentTimeMillis() - this.start) / 1000L;
     }
 
-    @Override
+    @SuppressWarnings("resource")
+	@Override
     public void run() {
         this.start = System.currentTimeMillis();
         final int threads = Math.max(2, Runtime.getRuntime().availableProcessors() - 1);
diff --git a/source/net/yacy/document/importer/WarcImporter.java b/source/net/yacy/document/importer/WarcImporter.java
index 61ff156df..d5b0af059 100644
--- a/source/net/yacy/document/importer/WarcImporter.java
+++ b/source/net/yacy/document/importer/WarcImporter.java
@@ -108,7 +108,8 @@ public class WarcImporter extends Thread implements Importer {
      * @param f inputstream for the warc file
      * @throws IOException
      */
-    public void indexWarcRecords(InputStream f) throws IOException {
+    @SuppressWarnings("resource")
+	public void indexWarcRecords(InputStream f) throws IOException {
 
         byte[] content;
         job = this;
@@ -146,6 +147,7 @@ public class WarcImporter extends Thread implements Importer {
                                     bbuffer.append(c);
                                 }
                                 content = bbuffer.getBytes();
+                                bbuffer.close();
                             } else {
                                 content = new byte[(int) http.getPayloadLength()];
                                 istream.read(content, 0, content.length);
diff --git a/source/net/yacy/document/parser/apkParser.java b/source/net/yacy/document/parser/apkParser.java
index 60f5b1048..d14b87768 100644
--- a/source/net/yacy/document/parser/apkParser.java
+++ b/source/net/yacy/document/parser/apkParser.java
@@ -478,6 +478,7 @@ public class apkParser extends AbstractParser implements Parser  {
             for (String s: resources) {
                 System.out.println(s);
             }
+            jf.close();
         } catch (Exception e) {
             e.printStackTrace();
         }
diff --git a/source/net/yacy/document/parser/docParser.java b/source/net/yacy/document/parser/docParser.java
index 623639eee..79223f908 100644
--- a/source/net/yacy/document/parser/docParser.java
+++ b/source/net/yacy/document/parser/docParser.java
@@ -27,6 +27,7 @@
 
 package net.yacy.document.parser;
 
+import java.io.IOException;
 import java.io.InputStream;
 import java.nio.charset.StandardCharsets;
 import java.util.ArrayList;
@@ -87,6 +88,7 @@ public class docParser extends AbstractParser implements Parser {
         try {
             contents.append(extractor.getText()); // extractor gets all text incl. headers/footers
         } catch (final Exception e) {
+        	try {extractor.close();} catch (IOException e1) {}
             throw new Parser.Failure("error in docParser, getText: " + e.getMessage(), location);
         }
         String title = (contents.length() > 240) ? contents.substring(0,240) : contents.toString().trim();
@@ -132,7 +134,7 @@ public class docParser extends AbstractParser implements Parser {
             false,
             extractor.getSummaryInformation().getLastSaveDateTime() // maybe null
             )};
-
+        try {extractor.close();} catch (IOException e1) {}
         return docs;
     }
 
@@ -161,6 +163,7 @@ public class docParser extends AbstractParser implements Parser {
         try {
             contents.append(extractor.getText());
         } catch (final Exception e) {
+        	try {extractor.close();} catch (IOException e1) {}
             throw new Parser.Failure("error in docParser, getText: " + e.getMessage(), location);
         }
         String title = (contents.length() > 240) ? contents.substring(0,240) : contents.toString().trim();
@@ -206,7 +209,7 @@ public class docParser extends AbstractParser implements Parser {
             false,
             extractor.getSummaryInformation().getLastSaveDateTime() // maybe null
             )};
-
+        try {extractor.close();} catch (IOException e1) {}
         return docs;
     }
 }
diff --git a/source/net/yacy/document/parser/html/CharacterCoding.java b/source/net/yacy/document/parser/html/CharacterCoding.java
index 943cd2b4e..62def9c83 100644
--- a/source/net/yacy/document/parser/html/CharacterCoding.java
+++ b/source/net/yacy/document/parser/html/CharacterCoding.java
@@ -25,14 +25,10 @@
 package net.yacy.document.parser.html;
 
 import net.yacy.search.Switchboard;
-import org.json.JSONArray;
 import org.json.JSONException;
 import org.json.JSONObject;
 
-import java.io.BufferedReader;
-import java.io.File;
 import java.io.IOException;
-import java.nio.charset.Charset;
 import java.nio.charset.StandardCharsets;
 import java.nio.file.Files;
 import java.nio.file.Paths;
diff --git a/source/net/yacy/document/parser/pptParser.java b/source/net/yacy/document/parser/pptParser.java
index 83a4d7221..281b50555 100644
--- a/source/net/yacy/document/parser/pptParser.java
+++ b/source/net/yacy/document/parser/pptParser.java
@@ -28,6 +28,7 @@
 package net.yacy.document.parser;
 
 import java.io.BufferedInputStream;
+import java.io.IOException;
 import java.io.InputStream;
 import java.nio.charset.StandardCharsets;
 import java.util.ArrayList;
@@ -122,6 +123,7 @@ public class pptParser extends AbstractParser implements Parser {
                 false,
                 pptExtractor.getSummaryInformation().getLastSaveDateTime() // may be null
                 )};
+            try {pptExtractor.close();} catch (IOException e1) {}
             return docs;
         } catch (final Exception e) {
             if (e instanceof InterruptedException) throw (InterruptedException) e;
diff --git a/source/net/yacy/document/parser/vsdParser.java b/source/net/yacy/document/parser/vsdParser.java
index 3018c3429..7f195dfe7 100644
--- a/source/net/yacy/document/parser/vsdParser.java
+++ b/source/net/yacy/document/parser/vsdParser.java
@@ -85,6 +85,7 @@ public class vsdParser extends AbstractParser implements Parser {
                 final VisioTextExtractor extractor = new VisioTextExtractor(source);
             	contents = extractor.getText();
                 summary = extractor.getSummaryInformation();
+                extractor.close();
             } catch (final Exception e) {
             	ConcurrentLog.warn("vsdParser", e.getMessage());
             }
diff --git a/source/net/yacy/document/parser/xlsParser.java b/source/net/yacy/document/parser/xlsParser.java
index 2e0e9cb52..5aa104f18 100644
--- a/source/net/yacy/document/parser/xlsParser.java
+++ b/source/net/yacy/document/parser/xlsParser.java
@@ -117,6 +117,7 @@ public class xlsParser extends AbstractParser implements Parser {
                 false,
                 sumInfo.getLastSaveDateTime())};
 
+            exceldoc.close();
             return retdocs;
 
         } catch (IOException ex1) {
diff --git a/source/net/yacy/htroot/Crawler_p.java b/source/net/yacy/htroot/Crawler_p.java
index 490f963b7..6a6ebf55d 100644
--- a/source/net/yacy/htroot/Crawler_p.java
+++ b/source/net/yacy/htroot/Crawler_p.java
@@ -879,12 +879,15 @@ public class Crawler_p {
         if((crawlingFileContent == null || crawlingFileContent.isEmpty()) && crawlingFile != null) {
             /* Let's report here detailed error to help user when he selected a wrong file */
             if(!crawlingFile.exists()) {
+            	writer.close();
                 throw new FileNotFoundException(crawlingFile.getAbsolutePath() +  " does not exists");
             }
             if(!crawlingFile.isFile()) {
+            	writer.close();
                 throw new FileNotFoundException(crawlingFile.getAbsolutePath() +  " exists but is not a regular file");
             }
             if(!crawlingFile.canRead()) {
+            	writer.close();
                 throw new IOException("Can not read : " + crawlingFile.getAbsolutePath());
             }
         }
diff --git a/source/net/yacy/htroot/PerformanceQueues_p.java b/source/net/yacy/htroot/PerformanceQueues_p.java
index 6b274edce..96fe5ae67 100644
--- a/source/net/yacy/htroot/PerformanceQueues_p.java
+++ b/source/net/yacy/htroot/PerformanceQueues_p.java
@@ -52,7 +52,8 @@ import net.yacy.server.serverSwitch;
 
 public class PerformanceQueues_p {
 
-    public static serverObjects respond(final RequestHeader header, final serverObjects post, final serverSwitch env) {
+    @SuppressWarnings("deprecation")
+	public static serverObjects respond(final RequestHeader header, final serverObjects post, final serverSwitch env) {
         // return variable that accumulates replacements
         final Switchboard sb = (Switchboard) env;
         final serverObjects prop = new serverObjects();
diff --git a/source/net/yacy/htroot/api/ynetSearch.java b/source/net/yacy/htroot/api/ynetSearch.java
index 84bd0f507..d9c756d8a 100644
--- a/source/net/yacy/htroot/api/ynetSearch.java
+++ b/source/net/yacy/htroot/api/ynetSearch.java
@@ -48,7 +48,9 @@ public class ynetSearch {
                 // final String s = searchaddress+"&query="+post.get("search")+"&maximumRecords="+post.get("maximumRecords")+"&startRecord="+post.get("startRecord");
                 final URL url = new URL(s);
                 is = url.openStream();
-                final String httpout = new Scanner(is).useDelimiter( "\\Z" ).next();
+                Scanner scanner = new Scanner(is);
+                final String httpout = scanner.useDelimiter( "\\Z" ).next();
+                scanner.close();
                 prop.put("http", httpout);
             } catch (final Exception e ) {
                 prop.put("url", "error!");
diff --git a/source/net/yacy/htroot/yacysearchitem.java b/source/net/yacy/htroot/yacysearchitem.java
index fafa3959d..9dc1912e1 100644
--- a/source/net/yacy/htroot/yacysearchitem.java
+++ b/source/net/yacy/htroot/yacysearchitem.java
@@ -111,7 +111,7 @@ public class yacysearchitem {
 	final boolean authenticated = adminAuthenticated || user != null;
 
         final boolean extendedSearchRights = adminAuthenticated || (user != null && user.hasRight(UserDB.AccessRight.EXTENDED_SEARCH_RIGHT));
-        final boolean bookmarkRights = adminAuthenticated || (user != null && user.hasRight(UserDB.AccessRight.BOOKMARK_RIGHT));
+        //final boolean bookmarkRights = adminAuthenticated || (user != null && user.hasRight(UserDB.AccessRight.BOOKMARK_RIGHT));
 
         final int item = post.getInt("item", -1);
         final RequestHeader.FileType fileType = header.fileType();
diff --git a/source/net/yacy/http/servlets/YaCyDefaultServlet.java b/source/net/yacy/http/servlets/YaCyDefaultServlet.java
index 054f8d905..1fd3d6c26 100644
--- a/source/net/yacy/http/servlets/YaCyDefaultServlet.java
+++ b/source/net/yacy/http/servlets/YaCyDefaultServlet.java
@@ -280,6 +280,7 @@ public class YaCyDefaultServlet extends HttpServlet  {
 
             if (!hasClass && (resource == null || !resource.exists()) && !pathInContext.contains("..")) {
                 // try to get this in the alternative htDocsPath
+            	if (resource != null) resource.close();
                 resource = Resource.newResource(new File(this._htDocsPath, pathInContext));
             }
 
@@ -1035,7 +1036,8 @@ public class YaCyDefaultServlet extends HttpServlet  {
                         submitted.contains("Crawler_p") ||
                         submitted.contains("ConfigBasic") ||
                         submitted.contains("Load_RSS_p");*/
-                final boolean advanced_enabled =
+                @SuppressWarnings("unused")
+				final boolean advanced_enabled =
                         crawler_enabled ||
                         submitted.contains("IndexImportMediawiki_p") ||
                         submitted.contains("CrawlStart");
diff --git a/source/net/yacy/utils/StartFromJava.java b/source/net/yacy/utils/StartFromJava.java
index b272b0797..d11690556 100644
--- a/source/net/yacy/utils/StartFromJava.java
+++ b/source/net/yacy/utils/StartFromJava.java
@@ -47,7 +47,7 @@ public class StartFromJava {
             } while(!"STOP".equals(s));
 
             run.stop();
-
+            sc.close();
         } catch(Exception ex) {
             Logger.getLogger(StartFromJava.class.getName()).log(Level.SEVERE, null, ex);
         }
diff --git a/source/net/yacy/yacy.java b/source/net/yacy/yacy.java
index 5277323e0..c4ca1838d 100644
--- a/source/net/yacy/yacy.java
+++ b/source/net/yacy/yacy.java
@@ -195,13 +195,19 @@ public final class yacy {
 
             f = new File(dataHome, "DATA/yacy.running");
             if (!f.createNewFile()) ConcurrentLog.severe("STARTUP", "WARNING: the file " + f + " can not be created!");
-            try { new FileOutputStream(f).write(Integer.toString(OS.getPID()).getBytes()); } catch (final Exception e) { } // write PID
+            try {
+            	FileOutputStream fos = new FileOutputStream(f);
+            	fos.write(Integer.toString(OS.getPID()).getBytes());
+            	fos.close();
+            } catch (final Exception e) { } // write PID
             f.deleteOnExit();
             FileChannel channel = null;
             FileLock lock = null;
             try {
-                channel = new RandomAccessFile(f,"rw").getChannel();
+            	RandomAccessFile raf = new RandomAccessFile(f,"rw");
+                channel = raf.getChannel();
                 lock = channel.tryLock(); // lock yacy.running
+                raf.close();
             } catch (final Exception e) { }
 
             final String conf = "DATA/SETTINGS/yacy.conf".replace("/", File.separator);