apache/seatunnel · error

Failed to get response from Doris {}, http code is {}

Error message

Failed to get response from Doris {}, http code is {}

What it means

parseResponse checks the HTTP status code of a response from a Doris FE REST call. If it is not 200 OK, it logs this warning with the URL and code and throws an IOException('Failed to get response from Doris'), which propagates to callers like getConnectionPost/getConnectionGet and aborts partition/schema discovery.

Source

Thrown at seatunnel-connectors-v2/connector-doris/src/main/java/org/apache/seatunnel/connectors/doris/rest/RestService.java:197

        URL realUrl = new URL(request);
        // open connection
        HttpURLConnection connection = (HttpURLConnection) realUrl.openConnection();
        String authEncoding =
                Base64.getEncoder()
                        .encodeToString(
                                String.format("%s:%s", user, passwd)
                                        .getBytes(StandardCharsets.UTF_8));
        connection.setRequestProperty("Authorization", "Basic " + authEncoding);

        connection.connect();
        return parseResponse(connection, logger);
    }

    private static String parseResponse(HttpURLConnection connection, Logger logger)
            throws IOException {
        int responseCode = connection.getResponseCode();
        if (responseCode != HttpStatus.SC_OK) {
            logger.warn(
                    "Failed to get response from Doris {}, http code is {}",
                    connection.getURL(),
                    responseCode);
            throw new IOException("Failed to get response from Doris");
        }

        StringBuilder result = new StringBuilder();
        try (BufferedReader in =
                new BufferedReader(
                        new InputStreamReader(
                                connection.getInputStream(), StandardCharsets.UTF_8))) {
            String line;
            while ((line = in.readLine()) != null) {
                result.append(line);
            }
        }

        return result.toString();

View on GitHub (pinned to cf67b549a7)

Solutions

  1. Read the logged http code: 401/403 -> fix credentials/privileges; 404 -> fix database/table name; 5xx -> inspect fe.log
  2. Verify username/password options and that the user has SELECT on the target database
  3. Confirm the database/table names match Doris exactly (case-sensitive)
  4. Retry if the FE was temporarily overloaded, or scale/restart the FE
  5. Test the same REST endpoint manually with curl using the same credentials

Example fix

// before
DorisSourceOptions.USERNAME.defaultValue() // anonymous default user without privileges
// after
"username" = "doris_reader",
"password" = "***"  // user granted SELECT ON db.*
Defensive patterns

Strategy: try-catch

Validate before calling

// precheck with curl using the job's credentials:
// curl -u user:pass http://fe:8030/api/<db>/<table>/_schema -w '%{http_code}'

Try / catch

try {
    String schema = RestService.getConnectionGet(...);
} catch (IOException e) {
    // log includes http code: 401/403 -> credentials; 404 -> db/table name; 5xx -> fe.log
}

Prevention

When it happens

Trigger: getConnectionPost or getConnectionGet receives a non-200 response (401 wrong credentials, 403 no privileges, 404 wrong db/table, 500 FE internal error) from endpoints like _query_plan or _schema.

Common situations: Incorrect username/password in Doris config; user lacking SELECT privilege on the database; typo in database or table name used by the source; FE returning 500 during heavy load or while a table is being schema-changed; FE version endpoint incompatibility.

Understand the failure class

Background: "API error: {status}" and "HTTP 401/403/404/429/5xx" errors: non-2xx HTTP responses explained — this error's family across 27 libraries.

Related errors

AI-assisted analysis of apache/seatunnel@cf67b549a7 (2026-09-10). Data as JSON: /api/errors/ce2995cc35ce670b. Report an issue: GitHub.