projectlombok/lombok · error · AppException

Too many lines in - only 4 expected

Error message

Too many lines in <path> - only 4 expected: <LINE_DESCRIPTIONS>

What it means

PublishToBucket.readCreds parses a credentials file expected to contain exactly 4 non-empty, trimmed lines: accessKey, secretKey, endpoint URL, bucket name (described by LINE_DESCRIPTIONS = "accessKey/secretKey/endpoint/bucket"). If the file contains a 5th non-empty line, readCreds throws this AppException. This is a strict file-shape validation so publish tooling never uploads with ambiguous credentials.

Solutions

1. Open the file reported by <path> and delete everything after the 4th non-empty line.
2. Ensure exactly 4 non-empty lines in order: accessKey, secretKey, endpoint URL, bucket name; remove inline comments (the parser does not strip '#' comments).
3. Regenerate the file from the template shown in the NoSuchFileException message (error 52) rather than editing an old copy.
4. If you need more config, move it to a separate file or env vars instead of the 4-line creds file.

Example fix

// before (creds file, 5 lines -> throws)
AKIA...
secret...
https://12345.r2.cloudflarestorage.com
lombok-data
# rot 2026-09-01
// after (4 lines, no extras)
AKIA...
secret...
https://12345.r2.cloudflarestorage.com
lombok-data

long nonEmpty = java.nio.file.Files.readAllLines(path).stream().filter(l -> !l.trim().isEmpty()).count();
if (nonEmpty > 4) throw new IllegalStateException(path + " must contain exactly 4 non-empty lines, found " + nonEmpty);

When it happens

Trigger: Running the publish flow (go -> readCreds) when the creds file at the configured path has 5 or more non-empty lines after trimming — e.g. extra blank-looking lines with whitespace/comments, a trailing annotation line, duplicated keys appended, or two credential files concatenated.

Common situations: Users append a comment or note line to the creds file; editors add a stray content line; credentials pasted from a wiki include headers; secrets manager exports wrap the 4 values with extra metadata lines.

Understand the failure class

Background: "Invalid value" and "allowed values are" config errors: what your library rejected and how to fix it — this error's family across 41 libraries.

Related errors

• Expected 3 lines in
• File with bucket endpoint + credentials is not available…
• Minor version must be between 0 and 999
• Lombok supports at most v
• Invalid value

AI-assisted analysis of projectlombok/lombok@6d6a3e9fec (2026-09-07). Data as JSON: /api/errors/01a5b9a15503cdab. Report an issue: GitHub.

Appendix: source

Thrown at src/support/lombok/publish/PublishToBucket.java:143

			}
		}
	}
	
	private static final String LINE_DESCRIPTIONS = "accessKey/secretKey/endpoint/bucket";
	private void readCreds(Path path) throws AppException {
		try {
			List<String> lines = Files.readAllLines(path);
			String accessKey = null, secretKey = null, endPoint = null, bucketName = null;
			for (String line : lines) {
				int idx = line.indexOf('#');
				if (idx != -1) line = line.substring(0, idx);
				line = line.trim();
				if (line.isEmpty()) continue;
				if (accessKey == null) { accessKey = line; continue; }
				if (secretKey == null) { secretKey = line; continue; }
				if (endPoint == null) { endPoint = line; continue; }
				if (bucketName == null) { bucketName = line; continue; }
				throw new AppException("Too many lines in " + path.toAbsolutePath() + " - only 4 expected: " + LINE_DESCRIPTIONS);
			}
			if (bucketName == null) throw new AppException("Expected 3 lines in " + path.toAbsolutePath() + ": " + LINE_DESCRIPTIONS);
			creds = AwsBasicCredentials.create(accessKey, secretKey);
			endpoint = URI.create(endPoint);
			this.bucketName = bucketName;
		} catch (NoSuchFileException e) {
			throw new AppException("File with bucket endpoint + credentials is not available. Make file " + path.toAbsolutePath() + "; it should contain something like: \n" +
				"123456789abcdef0123456789abcdef0  # this is the access key\n" +
				"123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef0  # this is the secret\n" +
				"https://12345.r2.cloudflarestorage.com   # this is the endpoint\n" +
				"lombok-data   # this is the bucket name");
		} catch (IOException e) {
			throw new AppException("I/O issue reading creds file " + path.toAbsolutePath() + ": " + e.getClass() + ": " + e.getMessage());
		}
	}
}

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