thanos-io/thanos · error

get caching bucket configuration

Error message

get caching bucket configuration

What it means

Reading the caching bucket configuration content failed (e.g. the --store.caching-bucket.config-file is unreadable or its Content() errored). Store needs this optional config to wrap the bucket with caching.

Solutions

1. Check the caching bucket config file path and permissions
2. Fix YAML syntax if the file is malformed
3. Remove the flag if caching is not needed

When it happens

Trigger: Thrown at cmd/thanos/store.go:339 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of thanos-io/thanos@35b8b99117 (2026-09-07). Data as JSON: /api/errors/53413fdcb5517464. Report an issue: GitHub.

Appendix: source

Thrown at cmd/thanos/store.go:339

	}
	parquetBktConfigYaml, err := conf.parquetStoreConfig.Content()
	if err != nil {
		return err
	}

	customBktConfig := exthttp.DefaultCustomBucketConfig()
	if err := yaml.Unmarshal(confContentYaml, &customBktConfig); err != nil {
		return errors.Wrap(err, "parsing config YAML file")
	}
	bkt, err := client.NewBucket(logger, confContentYaml, conf.component.String(), exthttp.CreateHedgedTransportWithConfig(customBktConfig))
	if err != nil {
		return err
	}
	insBkt := objstoretracing.WrapWithTraces(objstore.WrapWithMetrics(bkt, extprom.WrapRegistererWithPrefix("thanos_", reg), bkt.Name()))

	cachingBucketConfigYaml, err := conf.cachingBucketConfig.Content()
	if err != nil {
		return errors.Wrap(err, "get caching bucket configuration")
	}

	r := route.New()

	if len(cachingBucketConfigYaml) > 0 {
		insBkt, err = storecache.NewCachingBucketFromYaml(cachingBucketConfigYaml, insBkt, logger, reg, r, conf.cachingBucketConfig.Path())
		if err != nil {
			return errors.Wrap(err, "create caching bucket")
		}
	}

	relabelConfig, err := conf.selectorRelabel.RelabelConfig(block.SelectorSupportedRelabelActions)
	if err != nil {
		return err
	}

	indexCacheContentYaml, err := conf.indexCacheConfigs.Content()
	if err != nil {

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