Redis中 ERR Client sent AUTH, but no password is set异常

使用Java连接Redis服务器的时候发生该错误，提示ERR Client sent AUTH, but no password is set

Caused by: redis.clients.jedis.exceptions.JedisDataException: ERR Client sent AUTH, but no password is set
    at redis.clients.jedis.Protocol.processError(Protocol.java:127) ~[jedis-2.9.0.jar:na]
    at redis.clients.jedis.Protocol.process(Protocol.java:161) ~[jedis-2.9.0.jar:na]
    at redis.clients.jedis.Protocol.read(Protocol.java:215) ~[jedis-2.9.0.jar:na]
    at redis.clients.jedis.Connection.readProtocolWithCheckingBroken(Connection.java:340) ~[jedis-2.9.0.jar:na]
    at redis.clients.jedis.Connection.getStatusCodeReply(Connection.java:239) ~[jedis-2.9.0.jar:na]
    at redis.clients.jedis.BinaryJedis.auth(BinaryJedis.java:2139) ~[jedis-2.9.0.jar:na]
    at redis.clients.jedis.JedisFactory.makeObject(JedisFactory.java:108) ~[jedis-2.9.0.jar:na]
    at org.apache.commons.pool2.impl.GenericObjectPool.create(GenericObjectPool.java:868) ~[commons-pool2-2.4.2.jar:2.4.2]
    at org.apache.commons.pool2.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:435) ~[commons-pool2-2.4.2.jar:2.4.2]
    at org.apache.commons.pool2.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:363) ~[commons-pool2-2.4.2.jar:2.4.2]
    at redis.clients.util.Pool.getResource(Pool.java:49) ~[jedis-2.9.0.jar:na]
    ... 128 common frames omitted

解决

是因为 Redis 服务器没有设置密码，但是客户端发送了AUTH请求，所以发生了该异常；

可以使用如下方式启动

1 指定配置文件

redis-server /etc/redis/redis.conf

2 不指定配置文件(无密码)

redis-server