{"record":{"id":"9703ee39b714fc65","repo":"multica-ai/multica","slug":"close-s-copy-s-w","errorCode":null,"errorMessage":"close %s copy %s: %w","messagePattern":"close (.+?) copy (.+?): %w","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"server/internal/daemon/execenv/codex_home.go","lineNumber":1048,"sourceCode":"\tin, err := os.Open(src)\n\tif err != nil {\n\t\treturn fmt.Errorf(\"open %s %s: %w\", key, src, err)\n\t}\n\tdefer in.Close()\n\n\tout, err := root.OpenFile(relPath, os.O_WRONLY|os.O_CREATE|os.O_EXCL, 0o644)\n\tif err != nil {\n\t\treturn fmt.Errorf(\"create %s copy %s: %w\", key, relPath, err)\n\t}\n\tdefer out.Close()\n\n\tif _, err := io.Copy(out, in); err != nil {\n\t\treturn fmt.Errorf(\"copy %s %s to %s: %w\", key, src, relPath, err)\n\t}\n\t// Close explicitly so a deferred write-back failure cannot be swallowed; the\n\t// deferred Close then no-ops.\n\tif err := out.Close(); err != nil {\n\t\treturn fmt.Errorf(\"close %s copy %s: %w\", key, relPath, err)\n\t}\n\treturn nil\n}\n\n// syncCodexModelsCache seeds models_cache.json once for a fresh task home and\n// binds it to the shared provider/catalog configuration. Codex can replace the\n// task-local cache after startup, so an unchanged binding preserves whatever\n// the task last wrote rather than restoring a potentially stale shared copy.\n//\n// A changed or missing binding makes an existing cache unsafe: Codex's cache\n// format (as of 0.144.x) records the client version and fetch time but not the\n// provider identity. Reusing that cache after config.toml switches providers\n// can therefore pair provider B with provider A's model catalog. Drop it and\n// let Codex fetch a catalog for the new effective configuration. We\n// deliberately do not seed the shared cache in this case because it carries\n// the same provider-identity ambiguity.\nfunc syncCodexModelsCache(codexHome, sharedHome string, freshHome bool) error {\n\tfingerprint, err := codexModelsCacheConfigFingerprint(sharedHome)","sourceCodeStart":1030,"sourceCodeEnd":1066,"githubUrl":"https://github.com/multica-ai/multica/blob/2c0912b6ec764b373d44eeea1e80f0d9f11ab417/server/internal/daemon/execenv/codex_home.go#L1030-L1066","documentation":"The destination file is closed explicitly after io.Copy so that write-back failures (delayed ENOSPC, flush errors) are returned instead of being swallowed by the deferred Close. Seeing this error means data believed written did not actually reach stable storage.","triggerScenarios":"Buffered write flushed at close time hits ENOSPC or an I/O error; filesystem with delayed allocation reports failure only on close/fsync.","commonSituations":"Disk that was nearly full at copy time; failing drive; overlay filesystem in a container.","solutions":["Check and free disk space on the task home volume","Retry after resolving the underlying I/O condition","Check system logs for device errors"],"exampleFix":null,"handlingStrategy":"retry","validationCode":null,"typeGuard":null,"tryCatchPattern":"if err := materialiseInCodexHome(...); err != nil {\n\tif errors.Is(err, syscall.ENOSPC) {\n\t\t// close-time flush failure: space was exhausted during copy\n\t}\n}","preventionTips":["Treat close errors as real write failures — never ignore them","Reserve headroom on volumes used for task homes"],"tags":["filesystem","io","disk-full"],"backgroundTag":null,"analyzedSha":"2c0912b6ec764b373d44eeea1e80f0d9f11ab417","analyzedAt":"2026-08-15T13:25:18.241Z","schemaVersion":2},"datasetVersion":"2026-08-15T17:31:12.345Z"}