Redis:WRONGTYPE Operation against a key holding the wrong kind of value

1.错误信息

redis.clients.jedis.exceptions.JedisDataException: WRONGTYPE Operation against a key holding the wrong kind of value

2.分析

当前程序中key的操作类型,并不与redis库中存在的key的类型相匹配。举例 
第一次保存key,将其设置为key-value形式

[root@server3 src]# ./redis-cli -h 192.168.6.123 -p 6379 -a "{password}"
10.10.10.123:6379> set my_test_userid_001 "0001"
OK
10.10.10.123:6379> get my_test_userid_001
"0001"
 
第二次保存key,将其以key-map形式进行保存,则会报错

10.10.10.123:6379> hmset my_test_userid_001 user001 "0001" user002 "0002"
(error) WRONGTYPE Operation against a key holding the wrong kind of value
 
如果删除之前的key,则当前的操作可以进行:

10.10.10.123:6379> del my_test_userid_001
(integer) 1
10.10.10.123:6379> hmset my_test_userid_001 user001 "0001" user002 "0002"
OK
10.10.10.123:6379> hgetall my_test_userid_001
1) "user001"
2) "0001"
3) "user002"
4) "0002"
10.10.10.123:6379> hmget my_test_userid_001 user001
1) "0001"
10.10.10.123:6379> del my_test_userid_001
(integer) 1
 
3.问题解决

3.1.临时解决

删除冲突key,类似于:

10.10.10.123:6379> del my_test_userid_001

3.2.根本解决

造成这个问题,肯定是程序在多处使用了同一个key,并且是以不同的类型,有的以key-value类型,有的以key-map,有的以key-object。 

在Redis中每个键都属于一个明确的数据类型,如通过hset命令创建的健是散列类型,通过set命令建立的健是字符串类型等。使用一种数据类型的命令操作另一种数据类型的健会提示错误:”(error) WRONGTYPE Operation against a key holding the wrong kind of value”。
 

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