Cannot use Jedis when in Multi. Please use JedisTransaction instead.

Cannot use Jedis when in Multi. Please use JedisTransaction instead.

 

当在程序中遇到这个异常时，有可能是返回的缓存对象序列化失败。

例子:

@CachePut(value = "emchat", key = "'Emchat:' + #emchatMsg.msgFrom+#emchatMsg.msgDate")
    public Emchat[] saveEmchatInRedis(EmchatMsg emchatMsg){
        return  EmchatUtils.convertEmchatMsgStr(emchatMsg);
    }

运行此方法时会报：Cannot use Jedis when in Multi. Please use JedisTransaction instead.

但是换成:

@CachePut(value = "emchat", key = "'Emchat:' + #emchatMsg.msgFrom+#emchatMsg.msgDate",condition="#result != null")
    public String saveEmchatInRedis(EmchatMsg emchatMsg){
        if(null!=emchatMsg){
            return emchatMsg.getMsgContent();
        }
        return null;
    }

就可以运行成功，说明缓存的对象没有进行处理成能缓存的对象(配置里没有支持数组处理)。

配置如下：

<bean id="cacheManager" class="org.springframework.data.redis.cache.RedisCacheManager"
            c:template-ref="redisTemplate" p:defaultExpiration="14400"/>
   
    <bean id="jedisConnFactory" class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory">
            <property name="usePool" value="true"/>
            <property name="hostName" value="${redis.host}"/>
            <property name="port" value="${redis.port}"/>
            <property name="database" value="${redis.database}"/>
    </bean>
   
    <bean id="jedisClient" class="redis.clients.jedis.Jedis" c:host="${redis.host}"></bean>
   
    <bean id="redisTemplate" class="org.springframework.data.redis.core.RedisTemplate"
            p:connection-factory-ref="jedisConnFactory">
        <property name="keySerializer">
            <bean class="org.springframework.data.redis.serializer.StringRedisSerializer"></bean>
        </property>
        <property name="stringSerializer">
            <bean class="org.springframework.data.redis.serializer.StringRedisSerializer"></bean>
        </property>
        <property name="hashKeySerializer">
            <bean class="org.springframework.data.redis.serializer.StringRedisSerializer"></bean>
        </property>
        <property name="hashValueSerializer">
            <bean class="org.springframework.data.redis.serializer.StringRedisSerializer"></bean>
        </property>
    </bean>
    <cache:annotation-driven proxy-target-class="false"/>