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
request_size = Integer.parseInt(size);
                } catch (Throwable t) {
                    request_size = 10;
                }
                if (messageBlock == null) {
                    StringBuilder sb = new StringBuilder();
                    for (int i = 0; i < request_size; i++) {
                        sb.append(oneKBlock);
                    }
                    messageBlock = sb.toString();
                    System.out.println("set messageBlock to " + messageBlock);
                }
                int index = rd.nextInt(connectionCount);
                ExchangeClient client = arrays.get(index);
                
                String output = (String) client.request(messageBlock).get();
                if (output.lastIndexOf(messageBlock) < 0) {
                    System.out.println("send messageBlock;get " + output);
                    throw new Throwable("return results invalid");
                } else {
                    if (j % 100 == 0)
                        System.out.println("OK: " + j);
                }
            } catch (Throwable t) {
                t.printStackTrace();
            }
        }
    }
}