{"record":{"id":"dd3a692b2e24995e","repo":"micro/go-micro","slug":"error-reading-from-store","errorCode":null,"errorMessage":"Error reading from store","messagePattern":"Error reading from store","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"events/store.go","lineNumber":64,"sourceCode":"\t}\n\n\t// parse the options\n\toptions := ReadOptions{\n\t\tOffset: 0,\n\t\tLimit:  250,\n\t}\n\tfor _, o := range opts {\n\t\to(&options)\n\t}\n\n\t// execute the request\n\trecs, err := s.store.Read(topic+joinKey,\n\t\tstore.ReadPrefix(),\n\t\tstore.ReadLimit(options.Limit),\n\t\tstore.ReadOffset(options.Offset),\n\t)\n\tif err != nil {\n\t\treturn nil, errors.Wrap(err, \"Error reading from store\")\n\t}\n\n\t// unmarshal the result\n\tresult := make([]*Event, len(recs))\n\tfor i, r := range recs {\n\t\tvar e Event\n\t\tif err := json.Unmarshal(r.Value, &e); err != nil {\n\t\t\treturn nil, errors.Wrap(err, \"Invalid event returned from stroe\")\n\t\t}\n\t\tresult[i] = &e\n\t}\n\n\treturn result, nil\n}\n\n// Write an event to the store\nfunc (s *evStore) Write(event *Event, opts ...WriteOption) error {\n\t// parse the options","sourceCodeStart":46,"sourceCodeEnd":82,"githubUrl":"https://github.com/micro/go-micro/blob/24529f140421a11a33b6999ab7944f2021cfd69c/events/store.go#L46-L82","documentation":"evStore.Read reads event records from the underlying store (memory store, optionally backed up) using the topic as a key prefix. This error wraps any error the store returns during that Read call, meaning the records could not be fetched from the storage backend.","triggerScenarios":"Calling evStore.Read(topic, ...) when the backing store backend fails: a remote store (e.g. cockroach/redis store plugin) is unreachable, the store was closed, or the store implementation rejects the prefix read (e.g. key/option restrictions in custom store implementations).","commonSituations":"Store plugin (redis, cockroach, etc.) credentials wrong or service down; using a store backend that doesn't support ReadPrefix/ReadOffset options; store connection pool exhausted under load.","solutions":["Check errors.Cause(err) for the backend-specific failure","Verify the backing store service is reachable and credentials are correct","If using a custom store plugin, confirm it supports prefix reads with limits and offsets","Fall back to or restart with the default memory store to isolate the backend issue","Add retry/backoff around Read for transient backend errors"],"exampleFix":"// before\nrecs, err := s.store.Read(topic+\"/\", store.ReadPrefix())\n// fails against a remote store that is down\n// after\nif err != nil {\n    if isTransient(errors.Cause(err)) {\n        backoff.Retry(func() error { _, err = s.store.Read(...); return err }, policy)\n    }\n}","handlingStrategy":"retry","validationCode":"// check backend reachability before reading\nif pinger, ok := backend.(interface{ Ping() error }); ok {\n    if err := pinger.Ping(); err != nil { return err }\n}","typeGuard":null,"tryCatchPattern":"recs, err := evStore.Read(topic)\nif err != nil {\n    if strings.Contains(err.Error(), \"Error reading from store\") {\n        cause := errors.Cause(err)\n        // retry transient backend errors, otherwise surface config problem\n        log.Printf(\"store read failed: %v\", cause)\n    }\n    return err\n}","preventionTips":["Health-check the store backend at startup","Use store plugins that support prefix reads, limits, and offsets","Configure correct credentials and connection strings for remote stores","Add retry/backoff for transient network errors against remote stores"],"tags":["store","read","persistence"],"backgroundTag":"store-read-failed","analyzedSha":"24529f140421a11a33b6999ab7944f2021cfd69c","analyzedAt":"2026-09-01T02:52:24.923Z","contentChangedAt":null,"schemaVersion":2},"datasetVersion":"2026-09-08T05:18:18.240Z"}