NoClassDefFoundError in Lettuce 6.7.0

[xtaixe]

Bug Report

Current Behavior

After upgrading from 6.6.0 to 6.7.0 I'm getting:

java.lang.NoClassDefFoundError: io/micrometer/common/util/internal/logging/InternalLoggerFactory
	at io.lettuce.core.resource.Transports$NativeTransports.<clinit>(Transports.java:64)
	at io.lettuce.core.resource.Transports.datagramChannelClass(Transports.java:52)
	at io.lettuce.core.resource.AddressResolverGroupProvider$DefaultDnsAddressResolverGroupWrapper.<clinit>(AddressResolverGroupProvider.java:42)
	at io.lettuce.core.resource.AddressResolverGroupProvider.<clinit>(AddressResolverGroupProvider.java:26)
	at io.lettuce.core.resource.DefaultClientResources.<clinit>(DefaultClientResources.java:117)
	at io.lettuce.core.resource.ClientResources.builder(ClientResources.java:91)

Input Code

var socketAddressResolver = MappingSocketAddressResolver.create((Function<HostAndPort, HostAndPort>)
                hostAndPort -> hostAndPortMap.getOrDefault(hostAndPort.getHostText(), hostAndPort));

        var clientResources = ClientResources.builder().socketAddressResolver(socketAddressResolver).build();
        return RedisClusterClient.create(clientResources, redisUri);

Expected behavior/code

Client created with no exceptions

Environment

• Lettuce version: 6.7.0.RELEASE
• Redis version: 7.4

Additional context

Micrometer is not in the dependency tree and my understanding is that it should be optional.

[tishun]

Unfortunate mistake, thanks for reporting it.

A workaround is - obviously - to include the micrometer dependency.

<dependency>
    <groupId>io.micrometer</groupId>
    <artifactId>micrometer-core</artifactId>
    <version>${micrometer.version}</version> <!-- e.g. micrometer.version==1.6.0 -->
</dependency>

The fix will be available in Lettuce 6.7.1

[tishun]

Lettuce 6.7.1.RELEASE was just released