java-chassis可以设置tcp连接超时的时间吗

[five111]

背景如下

应用在现网跑了一段时间 偶现
io.netty.channel.connecttimeoutexception connection timed out
应该是tcp连接超时了 具体发送请求仅过去了1s 查看netty源码如下

@Override
        public final void connect(
                final SocketAddress remoteAddress, final SocketAddress localAddress, final ChannelPromise promise) {
            if (!promise.setUncancellable() || !ensureOpen(promise)) {
                return;
            }

            try {
                if (connectPromise != null) {
                    // Already a connect in process.
                    throw new ConnectionPendingException();
                }

                boolean wasActive = isActive();
                if (doConnect(remoteAddress, localAddress)) {
                    fulfillConnectPromise(promise, wasActive);
                } else {
                    connectPromise = promise;
                    requestedRemoteAddress = remoteAddress;

                    // Schedule connect timeout.
                    int connectTimeoutMillis = config().getConnectTimeoutMillis();
                    if (connectTimeoutMillis > 0) {
                        connectTimeoutFuture = eventLoop().schedule(new Runnable() {
                            @Override
                            public void run() {
                                ChannelPromise connectPromise = AbstractNioChannel.this.connectPromise;
                                if (connectPromise != null && !connectPromise.isDone()
                                        && connectPromise.tryFailure(new ConnectTimeoutException(
                                                "connection timed out: " + remoteAddress))) {
                                    close(voidPromise());
                                }
                            }
                        }, connectTimeoutMillis, TimeUnit.MILLISECONDS);
                    }

                    promise.addListener(new ChannelFutureListener() {
                        @Override
                        public void operationComplete(ChannelFuture future) throws Exception {
                            if (future.isCancelled()) {
                                if (connectTimeoutFuture != null) {
                                    connectTimeoutFuture.cancel(false);
                                }
                                connectPromise = null;
                                close(voidPromise());
                            }
                        }
                    });
                }
            } catch (Throwable t) {
                promise.tryFailure(annotateConnectException(t, remoteAddress));
                closeIfClosed();
            }
        }

netty 的默认配置应该是 30s

int connectTimeoutMillis = config().getConnectTimeoutMillis();
 @Override
public int getConnectTimeoutMillis() {
        return connectTimeoutMillis;
}
private volatile int connectTimeoutMillis = DEFAULT_CONNECT_TIMEOUT;
private static final int DEFAULT_CONNECT_TIMEOUT = 30000;

请问是否是java-chassis做了一层配置 ，如果是 该如何修改这个超时时间

[five111]

经过阅读源码

 public static int getConnectionTimeoutInMillis() {
    return DynamicPropertyFactory.getInstance()
        .getIntProperty("servicecomb.rest.client.connection.timeoutInMillis", 1000)
        .get();
  }

java-chassis是通过这个参数去配置的，当前这个参数在文档是看不见的。
请问是不希望用户修改吗，如果修改会有什么隐藏bug吗 这个时间似乎会记录到408的超时时间里去 ？
另外连接超时是否可以加入到重试机制里去？

[liubao68]

网络条件不好的情况下，可以考虑适当调大这个参数。