Added test for TooTallNate#900

Overwrite channel to always throw IOException

src/main/java/org/java_websocket/WebSocketImpl.java

@@ -512,7 +512,7 @@ public synchronized void closeConnection( int code, String message, boolean remo
 			try {
 				channel.close();
 			} catch ( IOException e ) {
-				if( e.getMessage().equals( "Broken pipe" ) ) {
+				if( e.getMessage() != null && e.getMessage().equals( "Broken pipe" ) ) {
 					log.trace( "Caught IOException: Broken pipe during closeConnection()", e );
 				} else {
 					log.error("Exception during channel.close()", e);

src/test/java/org/java_websocket/issues/Issue900Test.java

@@ -0,0 +1,155 @@
+/*
+ * Copyright (c) 2010-2020 Nathan Rajlich
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following
+ * conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ */
+
+package org.java_websocket.issues;
+
+import org.java_websocket.WebSocket;
+import org.java_websocket.WebSocketImpl;
+import org.java_websocket.WrappedByteChannel;
+import org.java_websocket.client.WebSocketClient;
+import org.java_websocket.handshake.ClientHandshake;
+import org.java_websocket.handshake.ServerHandshake;
+import org.java_websocket.server.WebSocketServer;
+import org.java_websocket.util.SocketUtil;
+import org.junit.Test;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.lang.reflect.Method;
+import java.net.InetSocketAddress;
+import java.net.URI;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.concurrent.CountDownLatch;
+
+public class Issue900Test {
+
+    CountDownLatch countServerDownLatch = new CountDownLatch(1);
+    CountDownLatch countCloseCallsDownLatch = new CountDownLatch(1);
+
+    @Test(timeout = 2000)
+    public void testIssue() throws Exception {
+        int port = SocketUtil.getAvailablePort();
+        final WebSocketClient client = new WebSocketClient(new URI("ws://localhost:" + port)) {
+            @Override
+            public void onOpen(ServerHandshake handshakedata) {
+
+            }
+
+            @Override
+            public void onMessage(String message) {
+            }
+
+            @Override
+            public void onClose(int code, String reason, boolean remote) {
+            }
+
+            @Override
+            public void onError(Exception ex) {
+
+            }
+        };
+        WebSocketServer server = new WebSocketServer(new InetSocketAddress(port)) {
+            @Override
+            public void onOpen(WebSocket conn, ClientHandshake handshake) {
+            }
+
+            @Override
+            public void onClose(WebSocket conn, int code, String reason, boolean remote) {
+                countCloseCallsDownLatch.countDown();
+            }
+
+            @Override
+            public void onMessage(WebSocket conn, String message) {
+
+            }
+
+            @Override
+            public void onError(WebSocket conn, Exception ex) {
+
+            }
+
+            @Override
+            public void onStart() {
+                countServerDownLatch.countDown();
+            }
+        };
+        new Thread(server).start();
+        countServerDownLatch.await();
+        client.connectBlocking();
+        WebSocketImpl websocketImpl = (WebSocketImpl)new ArrayList<WebSocket>(server.getConnections()).get(0);
+        websocketImpl.setChannel(new ExceptionThrowingByteChannel());
+        server.broadcast("test");
+        countCloseCallsDownLatch.await();
+    }
+    class ExceptionThrowingByteChannel implements WrappedByteChannel {
+
+        @Override
+        public boolean isNeedWrite() {
+            return false;
+        }
+
+        @Override
+        public void writeMore() throws IOException {
+            throw new IOException();
+        }
+
+        @Override
+        public boolean isNeedRead() {
+            return false;
+        }
+
+        @Override
+        public int readMore(ByteBuffer dst) throws IOException {
+            throw new IOException();
+        }
+
+        @Override
+        public boolean isBlocking() {
+            return false;
+        }
+
+        @Override
+        public int read(ByteBuffer dst) throws IOException {
+            throw new IOException();
+        }
+
+        @Override
+        public int write(ByteBuffer src) throws IOException {
+            throw new IOException();
+        }
+
+        @Override
+        public boolean isOpen() {
+            return false;
+        }
+
+        @Override
+        public void close() throws IOException {
+            throw new IOException();
+        }
+    }
+}