Redis - JUnit - Caused by: java.net.UnknownHostException: localhost

I have a SpringBoot application where I connect to Redis and it works on cloud environment:

 RedisStandaloneConfiguration redisStandaloneConfiguration = new RedisStandaloneConfiguration(); redisStandaloneConfiguration.setHostName("localhost"); redisStandaloneConfiguration.setPort(6379); redisStandaloneConfiguration.setPassword(REDIS_PASSWORD); LettuceConnectionFactory lettuceConnectionFactory = new LettuceConnectionFactory(redisStandaloneConfiguration, clientConfig); lettuceConnectionFactory.setValidateConnection(true);

Now i started a local Redis instance on localhost and port 6379; I tried to write a Junit test that uses Redis and I got the followingexception

Caused by: io.lettuce.core.RedisConnectionException: Unable to connect to  localhost:6379    at io.lettuce.core.RedisConnectionException.create(RedisConnectionException.java:78)    at io.lettuce.core.RedisConnectionException.create(RedisConnectionException.java:56)    at io.lettuce.core.AbstractRedisClient.getConnection(AbstractRedisClient.java:320)    at io.lettuce.core.RedisClient.connect(RedisClient.java:211)    at org.springframework.data.redis.connection.lettuce.StandaloneConnectionProvider.lambda$getConnection$1(StandaloneConnectionProvider.java:115)    at java.util.Optional.orElseGet(Optional.java:267)    at org.springframework.data.redis.connection.lettuce.StandaloneConnectionProvider.getConnection(StandaloneConnectionProvider.java:115)    at org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory$ExceptionTranslatingConnectionProvider.getConnection(LettuceConnectionFactory.java:1459)    ... 17 common frames omittedCaused by: java.net.UnknownHostException:  localhost    at java.net.InetAddress.getAllByName0(InetAddress.java:1281)    at java.net.InetAddress.getAllByName(InetAddress.java:1193)    at java.net.InetAddress.getAllByName(InetAddress.java:1127)    at java.net.InetAddress.getByName(InetAddress.java:1077)

Any hints?

I tried:

• localhost
• 127.0.0.1
• put localhost 127.0.0.1 in hosts file

But got the same exception