transactions - 没有 MULTI 的 ERR EXEC - Jedis

Question

我正在学习绝地武士，我无法完全找出这段代码中的问题。谁能帮助我。异常发生在语句 tx.exec()

public class JedisFactory {

 public static void main (String [] args){
     JedisPool pool = new JedisPool(new JedisPoolConfig(), "127.0.0.1", 6379);
     Jedis jedis = pool.getResource();

     Pipeline pipeline = jedis.pipelined();
     for(int i=0; i < 1000 ; i++){
         pipeline.hincrBy("Id", i+"", i);
     }
     pipeline.exec();        
     pool.returnResource(jedis);

     jedis = pool.getResource();
     Transaction tx = jedis.multi();
     Response<Map<String,String>> map = tx.hgetAll("Id");
     tx.hincrBy("Id","2", 1);
     **tx.exec();**
     //Map<String,String> map1 = jedis.hgetAll("Id");

     pool.returnResource(jedis);
     pool.destroy();
 }
}
Exception in thread "main" redis.clients.jedis.exceptions.JedisDataException: ERR EXEC without MULTI
    at redis.clients.jedis.Protocol.processError(Protocol.java:54)
    at redis.clients.jedis.Protocol.process(Protocol.java:61)
    at redis.clients.jedis.Protocol.read(Protocol.java:122)
    at redis.clients.jedis.Connection.getAll(Connection.java:207)
    at redis.clients.jedis.BinaryTransaction.exec(BinaryTransaction.java:23)
    at com.work.JedisFactory.main(JedisFactory.java:30)

Answer 1

pipeline.exec();你应该用multi()和close()方法包围。像这样：

pipeline.multi() ;
pipeline.exec();
pipeline.close(); 

Answer 2

在 for 循环之前添加 pipeline.multi() 解决了这个问题。但是在修复之前在其他行引发了异常。

Answer 3

我猜你应该使用 pipeline.execute() 而不是 pipeline.exec()，至少我是这样使用的，而且没问题。