googleapis/mcp-toolbox · error

error initializing Redis client: %s

Error message

error initializing Redis client: %s

What it means

initRedisClient returned an error while constructing the Redis/Redis Cluster client during source Initialize — typically an invalid URL/endpoint, unreachable host, or TLS option mismatch — and Initialize wraps it before failing.

Source

Thrown at internal/sources/redis/redis.go:79

	InsecureSkipVerify bool `yaml:"insecureSkipVerify"`
}

func (r Config) SourceConfigType() string {
	return SourceType
}

// RedisClient is an interface for `redis.Client` and `redis.ClusterClient
type RedisClient interface {
	Do(context.Context, ...any) *redis.Cmd
}

var _ RedisClient = (*redis.Client)(nil)
var _ RedisClient = (*redis.ClusterClient)(nil)

func (r Config) Initialize(ctx context.Context, tracer trace.Tracer) (sources.Source, error) {
	client, err := initRedisClient(ctx, r)
	if err != nil {
		return nil, fmt.Errorf("error initializing Redis client: %s", err)
	}
	s := &Source{
		Config: r,
		Client: client,
	}
	return s, nil
}

func initRedisClient(ctx context.Context, r Config) (RedisClient, error) {
	var authFn func(ctx context.Context) (username string, password string, err error)
	if r.UseGCPIAM {
		// Pass in an access token getter fn for IAM auth
		authFn = func(ctx context.Context) (username string, password string, err error) {
			token, err := sources.GetIAMAccessToken(ctx)
			if err != nil {
				return "", "", err
			}
			return "default", token, nil

View on GitHub (pinned to 8cc6e09de2)

Solutions

1. Verify the Redis endpoint URL, port and credentials in the source configuration
2. Confirm network reachability (VPC, firewall, AUTH requirements)
3. Check TLS/insecureSkipVerify settings match the server

When it happens

Trigger: Thrown at internal/sources/redis/redis.go:79 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of googleapis/mcp-toolbox@8cc6e09de2 (2026-09-05). Data as JSON: /api/errors/7c6b8237ea08bf25. Report an issue: GitHub.