redis client 2.0.0 pipeline 的list的rpop bug

Posted 2020-09-26 wzjhoutai

描写叙述:

redis client 2.0.0 pipeline 的list的rpop 存在严重bug,rpop list的时候,假设list已经为空的时候,rpop出来的Response依旧不为null,导致吊response.get()方法抛异常

代码:

@Test
	public void testRedisPipeline(){
	    Jedis jedis = null;
	    try{
	        jedis = new Jedis("127.0.0.1",6379);
	        Pipeline pipelined = jedis.pipelined();
	        for(int i=200;i<10000;i++){
	            pipelined.lpush("aa", "val"+i);
	        }
	        pipelined.sync();
	        
	    }catch(Exception e){
	        e.printStackTrace();
	    }finally{
	        if(jedis!=null){
	            jedis.disconnect();
	        }
	    }
	}
	

<span style="white-space:pre">	</span>//这种方法会造成redis qps无限上升
	@Test
	public void testRedisPipelinePop(){
	    Jedis jedis = null;
	    try{
	        List<Response<String>> result = new ArrayList<Response<String>>();
	        jedis = new Jedis("127.0.0.1",6379);
	        Pipeline pipelined = jedis.pipelined();
	        for(int i=0;i<10;i++){
	            //System.out.println(i);
	            Response<String> rpop = pipelined.rpop("aa");
	            //System.out.println(rpop);
	            result.add(rpop);
	        }
	        pipelined.sync();
	        //Response<Long> r = pipelined.bitcount("aa");
	        for (Response<String> response : result) {
                System.out.println(response.get());//异常
            }
	        
	    }catch(Exception e){
	        e.printStackTrace();
	    }finally{
	        if(jedis!=null){
	            jedis.disconnect();
	        }
	    }
	}

解决方法:

使用redis-cli 2.1.0以上版本号