lionsoul2014/ip2region · error

failed to load content from '%s': %w

Error message

failed to load content from '%s': %w

What it means

Go CLI helper: xdb.LoadContentFromFile failed while loading the entire xdb into memory for the content cache policy; wrapped cause is usually a short read, I/O error, or oversized file.

Source

Thrown at binding/golang/main.go:115

	version, err := xdb.VersionFromHeader(header)
	if err != nil {
		return nil, fmt.Errorf("failed to detect IP version from `%s`: %s", dbPath, err)
	}

	switch cachePolicy {
	case "nil", "file":
		return xdb.NewWithFileOnly(version, dbPath)
	case "vectorIndex":
		vIndex, err := xdb.LoadVectorIndexFromFile(dbPath)
		if err != nil {
			return nil, fmt.Errorf("failed to load vector index from `%s`: %w", dbPath, err)
		}

		return xdb.NewWithVectorIndex(version, dbPath, vIndex)
	case "content":
		cBuff, err := xdb.LoadContentFromFile(dbPath)
		if err != nil {
			return nil, fmt.Errorf("failed to load content from '%s': %w", dbPath, err)
		}

		return xdb.NewWithBuffer(version, cBuff)
	default:
		return nil, fmt.Errorf("invalid cache policy `%s`, options: file/vectorIndex/content", cachePolicy)
	}
}

func printHelp() {
	fmt.Printf("ip2region xdb searcher\n")
	fmt.Printf("%s [command] [command options]\n", os.Args[0])
	fmt.Printf("Command: \n")
	fmt.Printf("  search    search input test\n")
	fmt.Printf("  bench     search bench test\n")
}

func testSearch() {
	var err error

View on GitHub (pinned to c1a1fc7d59)

Solutions

1. Ensure the xdb file is intact and readable end-to-end
2. Use the vectorIndex or file policy if memory/size is a concern
3. Retry after fixing the underlying I/O issue reported in %w

When it happens

Trigger: Thrown at binding/golang/main.go:115 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of lionsoul2014/ip2region@c1a1fc7d59 (2026-09-02). Data as JSON: /api/errors/697cc8491bf0e85c. Report an issue: GitHub.