分支:master
MyInvoker类63行 if (hasException == false)  是否可以改成 if (!hasException) 
BlockMyInvoker类43行 if (hasException == false)  是否可以改成 if (!hasException) 
LegacyInvoker类62行if (hasException == false)  是否可以改成 if (!hasException) 
PerformanceClientFixedTest类83行 if (client != null && client.isConnected() == false)
是否可以改成 if (client != null && !client.isConnected() )
第一次提交issue，如有错误，请指正，感谢
/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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
 *
 *     http://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.
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package org.apache.dubbo.filter;
import org.apache.dubbo.rpc.AppResponse;
import org.apache.dubbo.service.DemoService;
import com.alibaba.dubbo.common.URL;
import com.alibaba.dubbo.rpc.Invocation;
import com.alibaba.dubbo.rpc.Invoker;
import com.alibaba.dubbo.rpc.Result;
import com.alibaba.dubbo.rpc.RpcException;
public class LegacyInvoker<T> implements Invoker<T> {