diff --git a/apps/i2psnark/java/src/org/klomp/snark/PeerAcceptor.java b/apps/i2psnark/java/src/org/klomp/snark/PeerAcceptor.java
index e8b1233735..ee651ed855 100644
--- a/apps/i2psnark/java/src/org/klomp/snark/PeerAcceptor.java
+++ b/apps/i2psnark/java/src/org/klomp/snark/PeerAcceptor.java
@@ -117,9 +117,8 @@ public class PeerAcceptor
         }
     } else {
         // multitorrent capable, so lets see what we can handle
-        for (Iterator iter = coordinators.iterator(); iter.hasNext(); ) {
-            PeerCoordinator cur = (PeerCoordinator)iter.next();
-
+        PeerCoordinator cur = coordinators.get(peerInfoHash);
+        if (cur != null) {
             if (DataHelper.eq(cur.getInfoHash(), peerInfoHash)) {
                 if (cur.needPeers())
                   {
diff --git a/apps/i2psnark/java/src/org/klomp/snark/PeerCoordinatorSet.java b/apps/i2psnark/java/src/org/klomp/snark/PeerCoordinatorSet.java
index de367c4d4b..7b1347bf79 100644
--- a/apps/i2psnark/java/src/org/klomp/snark/PeerCoordinatorSet.java
+++ b/apps/i2psnark/java/src/org/klomp/snark/PeerCoordinatorSet.java
@@ -1,9 +1,10 @@
 package org.klomp.snark;
 
-import java.util.ArrayList;
-import java.util.HashSet;
 import java.util.Iterator;
-import java.util.Set;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+
+import net.i2p.crypto.SHA1Hash;
 
 /**
  * Hmm, any guesses as to what this is?  Used by the multitorrent functionality
@@ -12,26 +13,28 @@ import java.util.Set;
  * from it there too)
  */
 public class PeerCoordinatorSet {
-    private final Set _coordinators;
+    private final Map<SHA1Hash, PeerCoordinator> _coordinators;
     
     public PeerCoordinatorSet() {
-        _coordinators = new HashSet();
+        _coordinators = new ConcurrentHashMap();
     }
-    
-    public Iterator iterator() {
-        synchronized (_coordinators) {
-            return new ArrayList(_coordinators).iterator();
-        }
+     
+    public Iterator<PeerCoordinator> iterator() {
+        return _coordinators.values().iterator();
     }
-    
+
     public void add(PeerCoordinator coordinator) {
-        synchronized (_coordinators) {
-            _coordinators.add(coordinator);
-        }
+        _coordinators.put(new SHA1Hash(coordinator.getInfoHash()), coordinator);
     }
+
     public void remove(PeerCoordinator coordinator) {
-        synchronized (_coordinators) {
-            _coordinators.remove(coordinator);
-        }
+        _coordinators.remove(new SHA1Hash(coordinator.getInfoHash()));
+    }
+
+    /**
+     *  @since 0.9.2
+     */
+    public PeerCoordinator get(byte[] infoHash) {
+        return _coordinators.get(new SHA1Hash(infoHash));
     }
 }
diff --git a/apps/i2psnark/java/src/org/klomp/snark/Snark.java b/apps/i2psnark/java/src/org/klomp/snark/Snark.java
index 138f2dd2c8..9bc0d7cea4 100644
--- a/apps/i2psnark/java/src/org/klomp/snark/Snark.java
+++ b/apps/i2psnark/java/src/org/klomp/snark/Snark.java
@@ -252,7 +252,7 @@ public class Snark
   private boolean stopped;
   private boolean starting;
   private byte[] id;
-  private byte[] infoHash;
+  private final byte[] infoHash;
   private String additionalTrackerURL;
   private final I2PSnarkUtil _util;
   private final PeerCoordinatorSet _peerCoordinatorSet;
@@ -340,6 +340,7 @@ public class Snark
     meta = null;
     File f = null;
     InputStream in = null;
+    byte[] x_infoHash = null;
     try
       {
         f = new File(torrent);
@@ -362,7 +363,7 @@ public class Snark
              throw new IOException("not found");
           }
         meta = new MetaInfo(in);
-        infoHash = meta.getInfoHash();
+        x_infoHash = meta.getInfoHash();
       }
     catch(IOException ioe)
       {
@@ -403,6 +404,7 @@ public class Snark
               try { in.close(); } catch (IOException ioe) {}
       }    
 
+    infoHash = x_infoHash;  // final
     debug(meta.toString(), INFO);
     
     // When the metainfo torrent was created from an existing file/dir
@@ -1239,8 +1241,8 @@ public class Snark
     if (_peerCoordinatorSet == null || uploaders <= 0)
       return false;
     int totalUploaders = 0;
-    for (Iterator iter = _peerCoordinatorSet.iterator(); iter.hasNext(); ) {
-      PeerCoordinator c = (PeerCoordinator)iter.next();
+    for (Iterator<PeerCoordinator> iter = _peerCoordinatorSet.iterator(); iter.hasNext(); ) {
+      PeerCoordinator c = iter.next();
       if (!c.halted())
         totalUploaders += c.uploaders;
     }
@@ -1253,8 +1255,8 @@ public class Snark
     if (_peerCoordinatorSet == null)
       return false;
     long total = 0;
-    for (Iterator iter = _peerCoordinatorSet.iterator(); iter.hasNext(); ) {
-      PeerCoordinator c = (PeerCoordinator)iter.next();
+    for (Iterator<PeerCoordinator> iter = _peerCoordinatorSet.iterator(); iter.hasNext(); ) {
+      PeerCoordinator c = iter.next();
       if (!c.halted())
         total += c.getCurrentUploadRate();
     }