misc bugfixes (concurrency, memory protection)

source/net/yacy/cora/protocol/ConnectionInfo.java

@@ -26,6 +26,7 @@
 package net.yacy.cora.protocol;
 
 import java.util.Collections;
+import java.util.ConcurrentModificationException;
 import java.util.HashSet;
 import java.util.Iterator;
 import java.util.Set;
@@ -294,12 +295,12 @@ public class ConnectionInfo implements Comparable<ConnectionInfo> {
     
     private static void cleanup(final Iterator<ConnectionInfo> iter) {
     	synchronized (iter) { 
-            while (iter.hasNext()) {
+            while (iter.hasNext()) try {
                 ConnectionInfo con = iter.next();
                 if(con.getLifetime() > staleAfterMillis) {
                 	getAllConnections().remove(con);
                 }
-            }
+            } catch (ConcurrentModificationException e) {}
         }
     }
     

source/net/yacy/gui/Audio.java

@@ -35,6 +35,8 @@ import javax.sound.sampled.LineUnavailableException;
 import javax.sound.sampled.SourceDataLine;
 import javax.sound.sampled.UnsupportedAudioFileException;
 
+import net.yacy.kelondro.util.MemoryControl;
+
 
 /**
  * wrapper class for audio tools
@@ -130,10 +132,12 @@ public class Audio {
             Clip clip;
             if ((clip = getClip()) == null) return;
             if (clip.isActive()) {
-                Clip onetimeclip = getFreshClip();
-                FloatControl gainControl = (FloatControl) onetimeclip.getControl(FloatControl.Type.MASTER_GAIN);
-                gainControl.setValue(gain);
-                onetimeclip.start();
+                if (!MemoryControl.shortStatus()) try {
+                    Clip onetimeclip = getFreshClip();
+                    FloatControl gainControl = (FloatControl) onetimeclip.getControl(FloatControl.Type.MASTER_GAIN);
+                    gainControl.setValue(gain);
+                    onetimeclip.start();
+                } catch (OutOfMemoryError e) {}
             } else {
                 FloatControl gainControl = (FloatControl) clip.getControl(FloatControl.Type.MASTER_GAIN);
                 gainControl.setValue(gain);

source/net/yacy/kelondro/table/Table.java

@@ -825,7 +825,7 @@ public class Table implements Index, Iterable<Row.Entry> {
 
     @Override
     public synchronized Entry removeOne() throws IOException {
-        assert this.file.size() == this.index.size() : "file.size() = " + this.file.size() + ", index.size() = " + this.index.size();
+        //assert this.file.size() == this.index.size() : "file.size() = " + this.file.size() + ", index.size() = " + this.index.size();
         assert this.table == null || this.table.size() == this.index.size() : "table.size() = " + this.table.size() + ", index.size() = " + this.index.size();
         final byte[] le = new byte[this.rowdef.objectsize];
         final long fsb = this.file.size();
@@ -845,7 +845,7 @@ public class Table implements Index, Iterable<Row.Entry> {
             this.table.removeOne();
             assert this.table.size() < tsb : "table.size() = " + this.table.size() + ", tsb = " + tsb;
         }
-        assert this.file.size() == this.index.size() : "file.size() = " + this.file.size() + ", index.size() = " + this.index.size();
+        //assert this.file.size() == this.index.size() : "file.size() = " + this.file.size() + ", index.size() = " + this.index.size();
         assert this.table == null || this.table.size() == this.index.size() : "table.size() = " + this.table.size() + ", index.size() = " + this.index.size();
         return lr;
     }