quarkusio/quarkus · error · SpiffeConnectionException

SPIFFE ID path must not have a trailing slash:

Error message

SPIFFE ID path must not have a trailing slash: 

What it means

SPIFFE ID paths must not end with a trailing '/'. SpiffeValidator.validateSpiffeId throws SpiffeConnectionException when URI.getPath() ends with '/', since path segments must each name a workload identifier component.

Source

Thrown at extensions/spiffe-client/runtime/src/main/java/io/quarkus/spiffe/client/runtime/internal/SpiffeValidator.java:123

        }
        if (trustDomain.length() > MAX_TRUST_DOMAIN_LENGTH) {
            throw new SpiffeConnectionException("SPIFFE ID trust domain exceeds maximum length of "
                    + MAX_TRUST_DOMAIN_LENGTH + " bytes: " + spiffeId);
        }
        for (int i = 0; i < trustDomain.length(); i++) {
            char c = trustDomain.charAt(i);
            if (!isValidTrustDomainChar(c)) {
                throw new SpiffeConnectionException(
                        "SPIFFE ID trust domain contains invalid character '" + c + "': " + spiffeId);
            }
        }

        String path = uri.getPath();
        if (path == null || path.isEmpty() || "/".equals(path)) {
            throw new SpiffeConnectionException("SPIFFE ID must have a non-root path: " + spiffeId);
        }
        if (path.endsWith("/")) {
            throw new SpiffeConnectionException("SPIFFE ID path must not have a trailing slash: " + spiffeId);
        }
        String[] segments = path.split("/", -1);
        for (int i = 1; i < segments.length; i++) {
            String segment = segments[i];
            if (segment.isEmpty()) {
                throw new SpiffeConnectionException(
                        "SPIFFE ID path must not contain empty segments: " + spiffeId);
            }
            if (".".equals(segment) || "..".equals(segment)) {
                throw new SpiffeConnectionException(
                        "SPIFFE ID path must not contain dot segments: " + spiffeId);
            }
            for (int j = 0; j < segment.length(); j++) {
                char c = segment.charAt(j);
                if (!isValidPathChar(c)) {
                    throw new SpiffeConnectionException(
                            "SPIFFE ID path contains invalid character '" + c + "': " + spiffeId);
                }

View on GitHub (pinned to e1c734241f)

Solutions

1. Remove the trailing slash from the path
2. Normalize the ID in code: strip trailing '/' before building/validating
3. Fix the segment-join logic so no separator is appended after the last segment

Example fix

// before
String spiffeId = base + "/ns/default/sa/app/";
// after
String normalized = base + "/ns/default/sa/app";

static String stripTrailingSlash(String id) {
    return id.endsWith("/") ? id.substring(0, id.length() - 1) : id;
}

try { validator.validateSpiffeId(id); } catch (SpiffeConnectionException e) { log.warnf("Trailing slash in SPIFFE ID: %s", id); }

When it happens

Trigger: validateSpiffeId called with IDs like 'spiffe://example.org/ns/default/sa/app/' or paths built by joining segments with a trailing separator.

Common situations: String-joining path segments with a loop that appends a final '/'; directory-style config values copied with a trailing slash; templating bugs that leave a dangling separator.

Related errors

• SPIFFE ID must have a non-root path:
• SPIFFE ID path must not contain empty segments:
• SPIFFE ID path must not contain dot segments:
• SPIFFE ID must not contain a port: ${spiffeId}
• SPIFFE ID must not contain a query:

AI-assisted analysis of quarkusio/quarkus@e1c734241f (2026-09-05). Data as JSON: /api/errors/3b8cf4f826562b50. Report an issue: GitHub.