gradle wrapper should not require bash

Version 2.0.3

.drone.yml

@@ -0,0 +1,9 @@
+kind: pipeline
+name: default
+
+steps:
+- name: test
+  image: adoptopenjdk/openjdk8:alpine
+  commands:
+  - ./gradlew assemble
+  - ./gradlew check

core/src/main/java/ch/dissem/bitmessage/entity/Plaintext.java

@@ -69,9 +69,9 @@ public class Plaintext implements Streamable {
         ackData = builder.ackData;
         if (builder.ackMessage != null && builder.ackMessage.length > 0) {
             ackMessage = Factory.getObjectMessage(
-                    3,
-                    new ByteArrayInputStream(builder.ackMessage),
-                    builder.ackMessage.length);
+                3,
+                new ByteArrayInputStream(builder.ackMessage),
+                builder.ackMessage.length);
         }
         signature = builder.signature;
         status = builder.status;
@@ -85,25 +85,25 @@ public class Plaintext implements Streamable {
 
     public static Plaintext read(Type type, InputStream in) throws IOException {
         return readWithoutSignature(type, in)
-                .signature(Decode.varBytes(in))
-                .received(UnixTime.now())
-                .build();
+            .signature(Decode.varBytes(in))
+            .received(UnixTime.now())
+            .build();
     }
 
     public static Plaintext.Builder readWithoutSignature(Type type, InputStream in) throws IOException {
         long version = Decode.varInt(in);
         return new Builder(type)
-                .addressVersion(version)
-                .stream(Decode.varInt(in))
-                .behaviorBitfield(Decode.int32(in))
-                .publicSigningKey(Decode.bytes(in, 64))
-                .publicEncryptionKey(Decode.bytes(in, 64))
-                .nonceTrialsPerByte(version >= 3 ? Decode.varInt(in) : 0)
-                .extraBytes(version >= 3 ? Decode.varInt(in) : 0)
-                .destinationRipe(type == Type.MSG ? Decode.bytes(in, 20) : null)
-                .encoding(Decode.varInt(in))
-                .message(Decode.varBytes(in))
-                .ackMessage(type == Type.MSG ? Decode.varBytes(in) : null);
+            .addressVersion(version)
+            .stream(Decode.varInt(in))
+            .behaviorBitfield(Decode.int32(in))
+            .publicSigningKey(Decode.bytes(in, 64))
+            .publicEncryptionKey(Decode.bytes(in, 64))
+            .nonceTrialsPerByte(version >= 3 ? Decode.varInt(in) : 0)
+            .extraBytes(version >= 3 ? Decode.varInt(in) : 0)
+            .destinationRipe(type == Type.MSG ? Decode.bytes(in, 20) : null)
+            .encoding(Decode.varInt(in))
+            .message(Decode.varBytes(in))
+            .ackMessage(type == Type.MSG ? Decode.varBytes(in) : null);
     }
 
     public InventoryVector getInventoryVector() {
@@ -198,6 +198,7 @@ public class Plaintext implements Streamable {
             }
         }
     }
+
     public void write(ByteBuffer buffer, boolean includeSignature) {
         Encode.varInt(from.getVersion(), buffer);
         Encode.varInt(from.getStream(), buffer);
@@ -263,6 +264,9 @@ public class Plaintext implements Streamable {
     }
 
     public void setStatus(Status status) {
+        if (status != Status.RECEIVED && sent == null && status != Status.DRAFT) {
+            sent = UnixTime.now();
+        }
         this.status = status;
     }
 
@@ -279,14 +283,16 @@ public class Plaintext implements Streamable {
     }
 
     public void updateNextTry() {
-        if (nextTry == null) {
-            if (sent != null && to.has(Feature.DOES_ACK)) {
-                nextTry = UnixTime.now(+ttl);
+        if (to != null) {
+            if (nextTry == null) {
+                if (sent != null && to.has(Feature.DOES_ACK)) {
+                    nextTry = UnixTime.now(+ttl);
+                    retries++;
+                }
+            } else {
+                nextTry = nextTry + (1 << retries) * ttl;
                 retries++;
             }
-        } else {
-            nextTry = nextTry + (1 << retries) * ttl;
-            retries++;
         }
     }
 
@@ -320,15 +326,15 @@ public class Plaintext implements Streamable {
         if (o == null || getClass() != o.getClass()) return false;
         Plaintext plaintext = (Plaintext) o;
         return Objects.equals(encoding, plaintext.encoding) &&
-                Objects.equals(from, plaintext.from) &&
-                Arrays.equals(message, plaintext.message) &&
-                Objects.equals(getAckMessage(), plaintext.getAckMessage()) &&
-                Arrays.equals(to.getRipe(), plaintext.to.getRipe()) &&
-                Arrays.equals(signature, plaintext.signature) &&
-                Objects.equals(status, plaintext.status) &&
-                Objects.equals(sent, plaintext.sent) &&
-                Objects.equals(received, plaintext.received) &&
-                Objects.equals(labels, plaintext.labels);
+            Objects.equals(from, plaintext.from) &&
+            Arrays.equals(message, plaintext.message) &&
+            Objects.equals(getAckMessage(), plaintext.getAckMessage()) &&
+            Arrays.equals(to == null ? null : to.getRipe(), plaintext.to == null ? null : plaintext.to.getRipe()) &&
+            Arrays.equals(signature, plaintext.signature) &&
+            Objects.equals(status, plaintext.status) &&
+            Objects.equals(sent, plaintext.sent) &&
+            Objects.equals(received, plaintext.received) &&
+            Objects.equals(labels, plaintext.labels);
     }
 
     @Override
@@ -582,13 +588,13 @@ public class Plaintext implements Streamable {
         public Plaintext build() {
             if (from == null) {
                 from = new BitmessageAddress(Factory.createPubkey(
-                        addressVersion,
-                        stream,
-                        publicSigningKey,
-                        publicEncryptionKey,
-                        nonceTrialsPerByte,
-                        extraBytes,
-                        behaviorBitfield
+                    addressVersion,
+                    stream,
+                    publicSigningKey,
+                    publicEncryptionKey,
+                    nonceTrialsPerByte,
+                    extraBytes,
+                    behaviorBitfield
                 ));
             }
             if (to == null && type != Type.BROADCAST && destinationRipe != null) {

gradlew

@@ -1,4 +1,20 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
+
+#
+# Copyright 2015 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
 
 ##############################################################################
 ##
@@ -6,42 +22,6 @@
 ##
 ##############################################################################
 
-# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-DEFAULT_JVM_OPTS=""
-
-APP_NAME="Gradle"
-APP_BASE_NAME=`basename "$0"`
-
-# Use the maximum available, or set MAX_FD != -1 to use that value.
-MAX_FD="maximum"
-
-warn ( ) {
-    echo "$*"
-}
-
-die ( ) {
-    echo
-    echo "$*"
-    echo
-    exit 1
-}
-
-# OS specific support (must be 'true' or 'false').
-cygwin=false
-msys=false
-darwin=false
-case "`uname`" in
-  CYGWIN* )
-    cygwin=true
-    ;;
-  Darwin* )
-    darwin=true
-    ;;
-  MINGW* )
-    msys=true
-    ;;
-esac
-
 # Attempt to set APP_HOME
 # Resolve links: $0 may be a link
 PRG="$0"
@@ -60,8 +40,49 @@ cd "`dirname \"$PRG\"`/" >/dev/null
 APP_HOME="`pwd -P`"
 cd "$SAVED" >/dev/null
 
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MSYS* | MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
 CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
 
+
 # Determine the Java command to use to start the JVM.
 if [ -n "$JAVA_HOME" ] ; then
     if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
@@ -85,7 +106,7 @@ location of your Java installation."
 fi
 
 # Increase the maximum file descriptors if we can.
-if [ "$cygwin" = "false" -a "$darwin" = "false" ] ; then
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
     MAX_FD_LIMIT=`ulimit -H -n`
     if [ $? -eq 0 ] ; then
         if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
@@ -105,10 +126,11 @@ if $darwin; then
     GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
 fi
 
-# For Cygwin, switch paths to Windows format before running java
-if $cygwin ; then
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
     APP_HOME=`cygpath --path --mixed "$APP_HOME"`
     CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+
     JAVACMD=`cygpath --unix "$JAVACMD"`
 
     # We build the pattern for arguments to be converted via cygpath
@@ -134,27 +156,30 @@ if $cygwin ; then
         else
             eval `echo args$i`="\"$arg\""
         fi
-        i=$((i+1))
+        i=`expr $i + 1`
     done
     case $i in
-        (0) set -- ;;
-        (1) set -- "$args0" ;;
-        (2) set -- "$args0" "$args1" ;;
-        (3) set -- "$args0" "$args1" "$args2" ;;
-        (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
-        (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
-        (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
-        (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
-        (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
-        (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+        0) set -- ;;
+        1) set -- "$args0" ;;
+        2) set -- "$args0" "$args1" ;;
+        3) set -- "$args0" "$args1" "$args2" ;;
+        4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
     esac
 fi
 
-# Split up the JVM_OPTS And GRADLE_OPTS values into an array, following the shell quoting and substitution rules
-function splitJvmOpts() {
-    JVM_OPTS=("$@")
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
 }
-eval splitJvmOpts $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS
-JVM_OPTS[${#JVM_OPTS[*]}]="-Dorg.gradle.appname=$APP_BASE_NAME"
+APP_ARGS=`save "$@"`
 
-exec "$JAVACMD" "${JVM_OPTS[@]}" -classpath "$CLASSPATH" org.gradle.wrapper.GradleWrapperMain "$@"
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+exec "$JAVACMD" "$@"

networking/src/main/java/ch/dissem/bitmessage/networking/AbstractConnection.java

@@ -54,7 +54,7 @@ public abstract class AbstractConnection {
     protected final NetworkHandler.MessageListener listener;
     protected final Map<InventoryVector, Long> ivCache;
     protected final Deque<MessagePayload> sendingQueue;
-    protected final Set<InventoryVector> commonRequestedObjects;
+    protected final Map<InventoryVector, Long> commonRequestedObjects;
     protected final Set<InventoryVector> requestedObjects;
 
     protected volatile State state;
@@ -71,7 +71,7 @@ public abstract class AbstractConnection {
 
     public AbstractConnection(InternalContext context, Mode mode,
                               NetworkAddress node,
-                              Set<InventoryVector> commonRequestedObjects,
+                              Map<InventoryVector, Long> commonRequestedObjects,
                               long syncTimeout) {
         this.ctx = context;
         this.mode = mode;
@@ -143,7 +143,7 @@ public abstract class AbstractConnection {
         int originalSize = inv.getInventory().size();
         updateIvCache(inv.getInventory());
         List<InventoryVector> missing = ctx.getInventory().getMissing(inv.getInventory(), streams);
-        missing.removeAll(commonRequestedObjects);
+        missing.removeAll(commonRequestedObjects.keySet());
         LOG.trace("Received inventory with " + originalSize + " elements, of which are "
             + missing.size() + " missing.");
         send(new GetData.Builder().inventory(missing).build());
@@ -175,7 +175,7 @@ public abstract class AbstractConnection {
         } catch (IOException e) {
             LOG.error("Stream " + objectMessage.getStream() + ", object type " + objectMessage.getType() + ": " + e.getMessage(), e);
         } finally {
-            if (!commonRequestedObjects.remove(objectMessage.getInventoryVector())) {
+            if (commonRequestedObjects.remove(objectMessage.getInventoryVector()) == null) {
                 LOG.debug("Received object that wasn't requested.");
             }
         }
@@ -205,6 +205,10 @@ public abstract class AbstractConnection {
         return ivCache.containsKey(iv);
     }
 
+    public boolean requested(InventoryVector iv) {
+        return requestedObjects.contains(iv);
+    }
+
     private void cleanupIvCache() {
         Long fiveMinutesAgo = UnixTime.now(-5 * MINUTE);
         for (Map.Entry<InventoryVector, Long> entry : ivCache.entrySet()) {

networking/src/main/java/ch/dissem/bitmessage/networking/Connection.java

@@ -36,9 +36,9 @@ import java.net.InetAddress;
 import java.net.InetSocketAddress;
 import java.net.Socket;
 import java.net.SocketTimeoutException;
-import java.util.HashSet;
+import java.util.HashMap;
+import java.util.Map;
 import java.util.Objects;
-import java.util.Set;
 
 import static ch.dissem.bitmessage.networking.AbstractConnection.Mode.CLIENT;
 import static ch.dissem.bitmessage.networking.AbstractConnection.Mode.SYNC;
@@ -64,20 +64,20 @@ class Connection extends AbstractConnection {
     private boolean socketInitialized;
 
     public Connection(InternalContext context, Mode mode, Socket socket,
-                      Set<InventoryVector> requestedObjectsMap) throws IOException {
+                      Map<InventoryVector, Long> requestedObjectsMap) throws IOException {
         this(context, mode, socket, requestedObjectsMap,
-                new NetworkAddress.Builder().ip(socket.getInetAddress()).port(socket.getPort()).stream(1).build(),
-                0);
+            new NetworkAddress.Builder().ip(socket.getInetAddress()).port(socket.getPort()).stream(1).build(),
+            0);
     }
 
     public Connection(InternalContext context, Mode mode, NetworkAddress node,
-                      Set<InventoryVector> requestedObjectsMap) {
+                      Map<InventoryVector, Long> requestedObjectsMap) {
         this(context, mode, new Socket(), requestedObjectsMap,
-                node, 0);
+            node, 0);
     }
 
     private Connection(InternalContext context, Mode mode, Socket socket,
-                       Set<InventoryVector> commonRequestedObjects, NetworkAddress node, long syncTimeout) {
+                       Map<InventoryVector, Long> commonRequestedObjects, NetworkAddress node, long syncTimeout) {
         super(context, mode, node, commonRequestedObjects, syncTimeout);
         this.startTime = UnixTime.now();
         this.socket = socket;
@@ -86,9 +86,9 @@ class Connection extends AbstractConnection {
     public static Connection sync(InternalContext ctx, InetAddress address, int port, MessageListener listener,
                                   long timeoutInSeconds) throws IOException {
         return new Connection(ctx, SYNC, new Socket(address, port),
-                new HashSet<InventoryVector>(),
-                new NetworkAddress.Builder().ip(address).port(port).stream(1).build(),
-                timeoutInSeconds);
+            new HashMap<InventoryVector, Long>(),
+            new NetworkAddress.Builder().ip(address).port(port).stream(1).build(),
+            timeoutInSeconds);
     }
 
     public long getStartTime() {

networking/src/main/java/ch/dissem/bitmessage/networking/ConnectionOrganizer.java

@@ -18,7 +18,6 @@ package ch.dissem.bitmessage.networking;
 
 import ch.dissem.bitmessage.InternalContext;
 import ch.dissem.bitmessage.entity.valueobject.NetworkAddress;
-import ch.dissem.bitmessage.ports.NetworkHandler;
 import ch.dissem.bitmessage.utils.UnixTime;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -32,12 +31,13 @@ import static ch.dissem.bitmessage.networking.DefaultNetworkHandler.NETWORK_MAGI
 /**
  * @author Christian Basler
  */
+@Deprecated
+@SuppressWarnings("deprecation")
 public class ConnectionOrganizer implements Runnable {
     private static final Logger LOG = LoggerFactory.getLogger(ConnectionOrganizer.class);
 
     private final InternalContext ctx;
     private final DefaultNetworkHandler networkHandler;
-    private final NetworkHandler.MessageListener listener;
 
     private Connection initialConnection;
 
@@ -45,7 +45,6 @@ public class ConnectionOrganizer implements Runnable {
                                DefaultNetworkHandler networkHandler) {
         this.ctx = ctx;
         this.networkHandler = networkHandler;
-        this.listener = ctx.getNetworkListener();
     }
 
     @Override
@@ -87,7 +86,7 @@ public class ConnectionOrganizer implements Runnable {
 
                     if (active < NETWORK_MAGIC_NUMBER) {
                         List<NetworkAddress> addresses = ctx.getNodeRegistry().getKnownAddresses(
-                                NETWORK_MAGIC_NUMBER - active, ctx.getStreams());
+                            NETWORK_MAGIC_NUMBER - active, ctx.getStreams());
                         boolean first = active == 0 && initialConnection == null;
                         for (NetworkAddress address : addresses) {
                             Connection c = new Connection(ctx, CLIENT, address, networkHandler.requestedObjects);

networking/src/main/java/ch/dissem/bitmessage/networking/DefaultNetworkHandler.java

@@ -39,7 +39,6 @@ import static ch.dissem.bitmessage.networking.AbstractConnection.Mode.SERVER;
 import static ch.dissem.bitmessage.networking.AbstractConnection.State.ACTIVE;
 import static ch.dissem.bitmessage.utils.DebugUtils.inc;
 import static ch.dissem.bitmessage.utils.ThreadFactoryBuilder.pool;
-import static java.util.Collections.newSetFromMap;
 
 /**
  * Handles all the networky stuff.
@@ -59,7 +58,7 @@ public class DefaultNetworkHandler implements NetworkHandler, ContextHolder {
     private ServerRunnable server;
     private volatile boolean running;
 
-    final Set<InventoryVector> requestedObjects = newSetFromMap(new ConcurrentHashMap<InventoryVector, Boolean>(50_000));
+    final Map<InventoryVector, Long> requestedObjects = new ConcurrentHashMap<>(50_000);
 
     @Override
     public void setContext(InternalContext context) {

networking/src/main/java/ch/dissem/bitmessage/networking/ServerRunnable.java

@@ -31,6 +31,7 @@ import static ch.dissem.bitmessage.networking.AbstractConnection.Mode.SERVER;
 /**
  * @author Christian Basler
  */
+@Deprecated
 public class ServerRunnable implements Runnable, Closeable {
     private static final Logger LOG = LoggerFactory.getLogger(ServerRunnable.class);
     private final InternalContext ctx;

networking/src/main/java/ch/dissem/bitmessage/networking/nio/ConnectionInfo.java

@@ -26,11 +26,10 @@ import ch.dissem.bitmessage.entity.valueobject.NetworkAddress;
 import ch.dissem.bitmessage.exception.NodeException;
 import ch.dissem.bitmessage.factory.V3MessageReader;
 import ch.dissem.bitmessage.networking.AbstractConnection;
+import ch.dissem.bitmessage.utils.UnixTime;
 
 import java.nio.ByteBuffer;
-import java.util.Iterator;
-import java.util.Queue;
-import java.util.Set;
+import java.util.*;
 
 import static ch.dissem.bitmessage.networking.AbstractConnection.Mode.CLIENT;
 import static ch.dissem.bitmessage.networking.AbstractConnection.Mode.SYNC;
@@ -46,7 +45,7 @@ public class ConnectionInfo extends AbstractConnection {
     private long lastUpdate = System.currentTimeMillis();
 
     public ConnectionInfo(InternalContext context, Mode mode, NetworkAddress node,
-                          Set<InventoryVector> commonRequestedObjects, long syncTimeout) {
+                          Map<InventoryVector, Long> commonRequestedObjects, long syncTimeout) {
         super(context, mode, node, commonRequestedObjects, syncTimeout);
         headerOut.flip();
         if (mode == CLIENT || mode == SYNC) {
@@ -147,8 +146,12 @@ public class ConnectionInfo extends AbstractConnection {
     protected void send(MessagePayload payload) {
         sendingQueue.add(payload);
         if (payload instanceof GetData) {
-            requestedObjects.addAll(((GetData) payload).getInventory());
-            commonRequestedObjects.addAll(((GetData) payload).getInventory());
+            Long now = UnixTime.now();
+            List<InventoryVector> inventory = ((GetData) payload).getInventory();
+            requestedObjects.addAll(inventory);
+            for (InventoryVector iv : inventory) {
+                commonRequestedObjects.put(iv, now);
+            }
         }
     }
 

networking/src/main/java/ch/dissem/bitmessage/networking/nio/NioNetworkHandler.java

@@ -46,14 +46,14 @@ import static ch.dissem.bitmessage.utils.Collections.selectRandom;
 import static ch.dissem.bitmessage.utils.DebugUtils.inc;
 import static ch.dissem.bitmessage.utils.ThreadFactoryBuilder.pool;
 import static java.nio.channels.SelectionKey.*;
-import static java.util.Collections.newSetFromMap;
 
 /**
  * Network handler using java.nio, resulting in less threads.
  */
 public class NioNetworkHandler implements NetworkHandler, InternalContext.ContextHolder {
     private static final Logger LOG = LoggerFactory.getLogger(NioNetworkHandler.class);
-    private static final long REQUESTED_OBJECTS_MAX_TIME = 30 * 60_000; // 30 minutes
+    private static final long REQUESTED_OBJECTS_MAX_TIME = 2 * 60_000; // 2 minutes
+    private static final Long DELAYED = Long.MIN_VALUE;
 
     private final ExecutorService threadPool = Executors.newCachedThreadPool(
         pool("network")
@@ -66,8 +66,7 @@ public class NioNetworkHandler implements NetworkHandler, InternalContext.Contex
     private ServerSocketChannel serverChannel;
     private Queue<NetworkAddress> connectionQueue = new ConcurrentLinkedQueue<>();
     private Map<ConnectionInfo, SelectionKey> connections = new ConcurrentHashMap<>();
-    private final Set<InventoryVector> requestedObjects = newSetFromMap(new ConcurrentHashMap<InventoryVector, Boolean>(10_000));
-    private long requestedObjectsTimeout = 0;
+    private final Map<InventoryVector, Long> requestedObjects = new ConcurrentHashMap<>(10_000);
 
     private Thread starter;
 
@@ -80,7 +79,7 @@ public class NioNetworkHandler implements NetworkHandler, InternalContext.Contex
                     channel.configureBlocking(false);
                     ConnectionInfo connection = new ConnectionInfo(ctx, SYNC,
                         new NetworkAddress.Builder().ip(server).port(port).stream(1).build(),
-                        new HashSet<InventoryVector>(), timeoutInSeconds);
+                        new HashMap<InventoryVector, Long>(), timeoutInSeconds);
                     while (channel.isConnected() && !connection.isSyncFinished()) {
                         write(channel, connection);
                         read(channel, connection);
@@ -147,7 +146,6 @@ public class NioNetworkHandler implements NetworkHandler, InternalContext.Contex
         } catch (IOException e) {
             throw new ApplicationException(e);
         }
-        requestedObjectsTimeout = System.currentTimeMillis() + REQUESTED_OBJECTS_MAX_TIME;
         requestedObjects.clear();
 
         starter = thread("connection manager", new Runnable() {
@@ -189,15 +187,22 @@ public class NioNetworkHandler implements NetworkHandler, InternalContext.Contex
                     // The list 'requested objects' helps to prevent downloading an object
                     // twice. From time to time there is an error though, and an object is
                     // never downloaded. To prevent a large list of failed objects and give
-                    // them a chance to get downloaded again, let's clear the list from time
-                    // to time. The timeout should be such that most of the initial object
-                    // sync should be done by then, but small enough to prevent objects with
-                    // a normal time out from not being downloaded at all.
-                    long now = System.currentTimeMillis();
-                    if (now > requestedObjectsTimeout) {
-                        requestedObjectsTimeout = now + REQUESTED_OBJECTS_MAX_TIME;
-                        requestedObjects.clear();
+                    // them a chance to get downloaded again, we will attempt to download an
+                    // object from another node after some time out.
+                    long timedOut = System.currentTimeMillis() - REQUESTED_OBJECTS_MAX_TIME;
+                    List<InventoryVector> delayed = new LinkedList<>();
+                    Iterator<Map.Entry<InventoryVector, Long>> iterator = requestedObjects.entrySet().iterator();
+                    while (iterator.hasNext()) {
+                        Map.Entry<InventoryVector, Long> e = iterator.next();
+                        //noinspection NumberEquality
+                        if (e.getValue() == DELAYED) {
+                            iterator.remove();
+                        } else if (e.getValue() < timedOut) {
+                            delayed.add(e.getKey());
+                            e.setValue(DELAYED);
+                        }
                     }
+                    request(delayed);
 
                     try {
                         Thread.sleep(30_000);
@@ -422,7 +427,7 @@ public class NioNetworkHandler implements NetworkHandler, InternalContext.Contex
                         break;
                     }
                 }
-                if (connection.knowsOf(next)) {
+                if (connection.knowsOf(next) && !connection.requested(next)) {
                     List<InventoryVector> ivs = distribution.get(connection);
                     if (ivs.size() == GetData.MAX_INVENTORY_SIZE) {
                         connection.send(new GetData.Builder().inventory(ivs).build());
@@ -442,7 +447,9 @@ public class NioNetworkHandler implements NetworkHandler, InternalContext.Contex
         } while (iterator.hasNext());
 
         // remove objects nobody knows of
-        requestedObjects.removeAll(inventoryVectors);
+        for (InventoryVector iv : inventoryVectors) {
+            requestedObjects.remove(iv);
+        }
 
         for (ConnectionInfo connection : distribution.keySet()) {
             List<InventoryVector> ivs = distribution.get(connection);

networking/src/test/java/ch/dissem/bitmessage/networking/NetworkHandlerTest.java

@@ -76,6 +76,7 @@ public class NetworkHandlerTest {
     }
 
     @Parameterized.Parameters
+    @SuppressWarnings("deprecation")
     public static List<Object[]> parameters() {
         return Arrays.asList(new Object[][]{
             {new DefaultNetworkHandler(), new DefaultNetworkHandler()},