RedisCommandExecutionException in Java Lettuce Redis client

Question

I have a problem with a Java Lettuce Redis client with ACL: I get an io.lettuce.core.RedisCommandExecutionException: WRONGPASS invalid username-password pair or user is disabled exception. I have a Redis Docker container configured as follows:

My Dockerfile:

FROM redis:6.2.1

COPY redis.conf /usr/local/etc/redis/redis.conf
COPY users.acl /etc/redis/users.acl

EXPOSE 6379

CMD ["redis-server", "/usr/local/etc/redis/redis.conf"]

The redis.conf file is:

aclfile /etc/redis/users.acl

and the users.acl file is:

user myuser on +@all ~* >mypassword
user default off

I run the container with the command:

docker run -it -p 6379:6379 --name myredis myredis

My Java client is:

...

import io.lettuce.core.RedisClient;
import io.lettuce.core.api.StatefulRedisConnection;

public class Main {
    public static void main(String... args) {
        try {
            RedisClient redisClient = RedisClient.create("redis://myuser:mypassword@localhost");
            StatefulRedisConnection<String, String> connection = redisClient.connect();
            System.out.println("Connected to Redis");
            connection.close();
            redisClient.shutdown();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            System.out.println("End!");
        }
    }
}

When I try to run it, I get the error:

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:234)
    at io.lettuce.core.RedisClient.connect(RedisClient.java:207)
    at io.lettuce.core.RedisClient.connect(RedisClient.java:192)
    at [MY_PACKAGE].Main.main(Main.java:16)
Caused by: io.lettuce.core.RedisCommandExecutionException: WRONGPASS invalid username-password pair or user is disabled.
    at io.lettuce.core.ExceptionFactory.createExecutionException(ExceptionFactory.java:135)
    at io.lettuce.core.ExceptionFactory.createExecutionException(ExceptionFactory.java:108)
    at io.lettuce.core.protocol.AsyncCommand.completeResult(AsyncCommand.java:120)
    at io.lettuce.core.protocol.AsyncCommand.complete(AsyncCommand.java:111)
    at io.lettuce.core.protocol.CommandHandler.complete(CommandHandler.java:654)
    at io.lettuce.core.protocol.CommandHandler.decode(CommandHandler.java:614)
    at io.lettuce.core.protocol.CommandHandler.channelRead(CommandHandler.java:565)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:374)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:360)
    at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:352)
    at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1422)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:374)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:360)
    at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:931)
    at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:163)
    at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:700)
    at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:635)
    at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:552)
    at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:514)
    at io.netty.util.concurrent.SingleThreadEventExecutor$6.run(SingleThreadEventExecutor.java:1050)
    at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
    at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
    at java.base/java.lang.Thread.run(Thread.java:834)

What am I doing wrong? Thanks in advance.

Answer 1

this works for me (lettuce 6.0.4), but it's pure magic:

change

user default off

into

user default off -@all +hello

I read redis and lettuce docs but couldn't find a proper explanation, but this may sound more legit to you:

user default on nopass -@all +hello

which will enable the clients to use default user to run only hello command, then by some means, the clients would know to use the configured user (myuser) for further commands.

hope this help, wait for the explanation from everyone :penguin: