one more try to fix the connection problem

git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@4556 6c8d7289-2bf4-0310-a012-ef5d649a1542

source/de/anomic/http/httpc.java

@@ -396,11 +396,14 @@ public final class httpc {
             this.initTime = System.currentTimeMillis();
             this.lastIO = System.currentTimeMillis();
             this.socket.setKeepAlive(false);
-            // setting socket timeout and keep alive behaviour
+            // set socket timeout and keep alive behavior
+            assert timeout >= 1000;
             this.socket.setSoTimeout(timeout); // waiting time for read
+            this.socket.setTcpNoDelay(true); // no accumulation until buffer is full
+            this.socket.setSoLinger(true, timeout); // wait for all data being written on close()
+            
             // get the connection
             this.socket.connect(address, timeout);
-            this.socket.setSoTimeout(timeout); // waiting time for read
             
             if (incomingByteCountAccounting != null) {
                 this.clientInputByteCount = new httpdByteCountInputStream(this.socket.getInputStream(),incomingByteCountAccounting);

source/de/anomic/server/serverCore.java

@@ -410,7 +410,17 @@ public final class serverCore extends serverAbstractThread implements serverThre
             
             if ((this.denyHost == null) || (this.denyHost.get(cIP) == null)) {
                 // setting the timeout properly
+                assert this.timeout >= 1000;
                 controlSocket.setSoTimeout(this.timeout);
+                // keep-alive: if set to true, the server frequently sends keep-alive packets to the client which the client must respond to
+                // we set this to false to prevent that a missing ack from the client forces the server to close the connection
+                controlSocket.setKeepAlive(false); 
+                
+                // disable Nagle's algorithm (waiting for more data until packet is full)
+                controlSocket.setTcpNoDelay(true);
+                
+                // set a non-zero linger, that means that a socket.close() blocks until all data is written
+                controlSocket.setSoLinger(true, this.timeout);
                 
                 // create session
                 Session connection = new Session(sessionThreadGroup, controlSocket, this.timeout);