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
if (client.isConnected()) {
                    arrays.add(client);
                    s++;
                    System.out.println("open client success " + s);
                } else {
                    System.out.println("open client failed, try again.");
                }
            } catch (Throwable t) {
                t.printStackTrace();
            } finally {
                if (client != null && client.isConnected() == false) {
                    f++;
                    System.out.println("open client failed, try again " + f);
                    client.close();
                }
            }
        }
        StringBuilder sb1 = new StringBuilder();
        Random rd2 = new Random();
        char[] numbersAndLetters = ("0123456789abcdefghijklmnopqrstuvwxyz" + "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ").toCharArray();
        int size1 = numbersAndLetters.length;
        for (int j = 0; j < 1024; j++) {
            sb1.append(numbersAndLetters[rd2.nextInt(size1)]);
        }
        oneKBlock = sb1.toString();
        for (int j = 0; j < Integer.MAX_VALUE; j++) {
            try {
                String size = "10";
                int request_size = 10;
                try {