configurable server write timeout

Author: fedejinich

rskj-core/src/main/java/co/rsk/RskContext.java

@@ -1600,7 +1600,8 @@ private Web3WebSocketServer getWeb3WebSocketServer() {
                     rskSystemProperties.rpcWebSocketBindAddress(),
                     rskSystemProperties.rpcWebSocketPort(),
                     jsonRpcHandler,
-                    getJsonRpcWeb3ServerHandler()
+                    getJsonRpcWeb3ServerHandler(),
+                    rskSystemProperties.rpcWebSocketServerWriteTimeout()
             );
         }
 

rskj-core/src/main/java/co/rsk/rpc/netty/Web3WebSocketServer.java

@@ -38,7 +38,6 @@
 
 public class Web3WebSocketServer implements InternalService {
     private static final Logger logger = LoggerFactory.getLogger(Web3WebSocketServer.class);
-    public static final int WRITE_TIMEOUT_SECONDS = 30;
 
     private final InetAddress host;
     private final int port;
@@ -47,18 +46,21 @@ public class Web3WebSocketServer implements InternalService {
     private final EventLoopGroup bossGroup;
     private final EventLoopGroup workerGroup;
     private @Nullable ChannelFuture webSocketChannel;
+    private final int serverWriteTimeout;
 
     public Web3WebSocketServer(
             InetAddress host,
             int port,
             RskWebSocketJsonRpcHandler webSocketJsonRpcHandler,
-            JsonRpcWeb3ServerHandler web3ServerHandler) {
+            JsonRpcWeb3ServerHandler web3ServerHandler,
+            int serverWriteTimeout) {
         this.host = host;
         this.port = port;
         this.webSocketJsonRpcHandler = webSocketJsonRpcHandler;
         this.web3ServerHandler = web3ServerHandler;
         this.bossGroup = new NioEventLoopGroup();
         this.workerGroup = new NioEventLoopGroup();
+        this.serverWriteTimeout = serverWriteTimeout;
     }
 
     @Override
@@ -73,7 +75,7 @@ protected void initChannel(SocketChannel ch) throws Exception {
                     ChannelPipeline p = ch.pipeline();
                     p.addLast(new HttpServerCodec());
                     p.addLast(new HttpObjectAggregator(1024 * 1024 * 5));
-                    p.addLast(new WriteTimeoutHandler(WRITE_TIMEOUT_SECONDS, TimeUnit.SECONDS));
+                    p.addLast(new WriteTimeoutHandler(serverWriteTimeout, TimeUnit.SECONDS));
                     p.addLast(new RskWebSocketServerProtocolHandler("/websocket"));
                     p.addLast(webSocketJsonRpcHandler);
                     p.addLast(web3ServerHandler);

rskj-core/src/main/java/org/ethereum/config/SystemProperties.java

@@ -82,6 +82,7 @@ public abstract class SystemProperties {
     private static final String PROPERTY_RPC_WEBSOCKET_ENABLED = "rpc.providers.web.ws.enabled";
     private static final String PROPERTY_RPC_WEBSOCKET_ADDRESS = "rpc.providers.web.ws.bind_address";
     private static final String PROPERTY_RPC_WEBSOCKET_PORT = "rpc.providers.web.ws.port";
+    private static final String PROPERTY_RPC_WEBSOCKET_SERVER_WRITE_TIMEOUT = "rpc.providers.web.ws.server_write_timeout";
 
     public static final String PROPERTY_PUBLIC_IP = "public.ip";
     public static final String PROPERTY_BIND_ADDRESS = "bind_address";
@@ -612,6 +613,10 @@ public int rpcWebSocketPort() {
         return configFromFiles.getInt(PROPERTY_RPC_WEBSOCKET_PORT);
     }
 
+    public int rpcWebSocketServerWriteTimeout() {
+        return configFromFiles.getInt(PROPERTY_RPC_WEBSOCKET_SERVER_WRITE_TIMEOUT);
+    }
+
     public InetAddress rpcHttpBindAddress() {
         return getWebBindAddress(PROPERTY_RPC_HTTP_ADDRESS);
     }

rskj-core/src/main/resources/expected.conf

@@ -219,6 +219,7 @@ rpc = {
                 enabled = <enabled>
                 bind_address = <bind_address>
                 port = <port>
+                server_write_timeout = <timeout>
             }
         }
     }

rskj-core/src/main/resources/reference.conf

@@ -281,6 +281,8 @@ rpc {
                 enabled = false
                 bind_address = localhost
                 port = 4445
+                # Shuts down the server when it's not able to write a response after a certain period (expressed in seconds)
+                server_write_timeout = 30
             }
         }
     }

rskj-core/src/test/java/co/rsk/rpc/netty/Web3WebSocketServerTest.java

@@ -17,6 +17,7 @@
  */
 package co.rsk.rpc.netty;
 
+import co.rsk.config.TestSystemProperties;
 import co.rsk.rpc.JacksonBasedRpcSerializer;
 import co.rsk.rpc.ModuleDescription;
 import com.fasterxml.jackson.core.JsonProcessingException;
@@ -30,6 +31,7 @@
 import okio.Buffer;
 import org.ethereum.rpc.Web3;
 import org.junit.After;
+import org.junit.Assert;
 import org.junit.Before;
 import org.junit.Test;
 
@@ -46,14 +48,14 @@
 import java.util.concurrent.atomic.AtomicReference;
 
 import static org.hamcrest.Matchers.is;
-import static org.junit.Assert.assertThat;
-import static org.junit.Assert.fail;
+import static org.junit.Assert.*;
 import static org.mockito.Mockito.*;
 
 public class Web3WebSocketServerTest {
 
     private static JsonNodeFactory JSON_NODE_FACTORY = JsonNodeFactory.instance;
     private static ObjectMapper OBJECT_MAPPER = new ObjectMapper();
+    private static final int DEFAULT_WRITE_TIMEOUT = 30;
 
     private ExecutorService wsExecutor;
 
@@ -68,13 +70,24 @@ public void smokeTest() throws Exception {
         String mockResult = "output";
         when(web3Mock.web3_sha3(anyString())).thenReturn(mockResult);
 
-        int randomPort = 9998;//new ServerSocket(0).getLocalPort();
+        int randomPort = 9998;
+
+        TestSystemProperties testSystemProperties = new TestSystemProperties();
 
         List<ModuleDescription> filteredModules = Collections.singletonList(new ModuleDescription("web3", "1.0", true, Collections.emptyList(), Collections.emptyList()));
         RskWebSocketJsonRpcHandler handler = new RskWebSocketJsonRpcHandler(null, new JacksonBasedRpcSerializer());
         JsonRpcWeb3ServerHandler serverHandler = new JsonRpcWeb3ServerHandler(web3Mock, filteredModules);
+        int serverWriteTimout = testSystemProperties.rpcWebSocketServerWriteTimeout();
+
+        assertEquals(DEFAULT_WRITE_TIMEOUT, serverWriteTimout);
 
-        Web3WebSocketServer websocketServer = new Web3WebSocketServer(InetAddress.getLoopbackAddress(), randomPort, handler, serverHandler);
+        Web3WebSocketServer websocketServer = new Web3WebSocketServer(
+                InetAddress.getLoopbackAddress(),
+                randomPort,
+                handler,
+                serverHandler,
+                serverWriteTimout
+        );
         websocketServer.start();
 
         OkHttpClient wsClient = new OkHttpClient();