连接超时问题

StorageServer storageServer = trackerClient.getStoreStorage(trackerServer);
当执行到上面这行代码时会报超时错误：
java.net.SocketTimeoutException: connect timed out

我检查了fdfs的服务器ip和端口，都没问题。trackerClient和trackerServer都可以获取到对象的。
完整代码如下：
ClientGlobal.init(CONFIG_FILENAME);
trackerClient = new TrackerClient();
trackerServer = trackerClient.getConnection();
if (trackerServer == null) {
throw new IllegalStateException("getConnection return null");
}

        **StorageServer storageServer = trackerClient.getStoreStorage(trackerServer);**
        if (storageServer == null) {
            throw new IllegalStateException("getStoreStorage return null");
        }
        storageClient = new StorageClient1(trackerServer, storageServer);

Start with the shown TrackerClient.getStoreStorage(trackerServer) call and the FastDFS client configuration used by ClientGlobal.init(CONFIG_FILENAME). Reproduce the SocketTimeoutException and trace which endpoint the call reaches. Done means the connection-timeout cause is identified and a verified resolution is documented.