prestodb/presto · error · PrestoException

REST_SERVER_BAD_RESPONSE

REST_SERVER_BAD_RESPONSE

Error message

Unexpected response code: 

What it means

Raised in the REST executor's response handler when the function-namespace server answers with a status code the executor does not recognize as success for the request it sent. The unexpected status code and request details are appended, indicating a protocol mismatch or server-side failure rather than a client bug.

Source

Thrown at presto-function-namespace-managers/src/main/java/com/facebook/presto/functionNamespace/rest/RestSqlFunctionExecutor.java:186

            else if (exception instanceof java.net.ConnectException) {
                throw new PrestoException(REST_SERVER_CONNECT_ERROR, "Failed to connect to REST server. Request: " + request, exception);
            }
            else {
                throw new PrestoException(REST_SERVER_ERROR, "Unexpected error during REST call. Request: " + request + ", Exception: " + exception.getMessage(), exception);
            }
        }

        @Override
        public SqlFunctionResult handle(Request request, Response response)
        {
            if (response.getStatusCode() == HTTP_NOT_FOUND) {
                throw new PrestoException(REST_SERVER_NOT_FOUND, "Resource not found on REST server. Request: " + request);
            }
            else if (response.getStatusCode() == HTTP_SERVER_ERROR) {
                throw new PrestoException(REST_SERVER_ERROR, "Internal server error on REST server. Request: " + request);
            }
            else if (response.getStatusCode() != HTTP_OK) {
                throw new PrestoException(REST_SERVER_BAD_RESPONSE, "Unexpected response code: " + response.getStatusCode() + ". Request: " + request);
            }

            try {
                SliceInput input = new InputStreamSliceInput(response.getInputStream());
                SerializedPage serializedPage = readSerializedPage(input);
                Page page = pageSerde.deserialize(serializedPage);
                checkArgument(page.getChannelCount() == 1, "Expected only one channel in the function output");
                SqlFunctionResult output = new SqlFunctionResult(page.getBlock(0), 1);
                return output;
            }
            catch (IOException e) {
                throw new PrestoException(REST_SERVER_IO_ERROR, "Error deserializing REST server response: " + e.getMessage(), e);
            }
        }
    }

    public static class SqlResultFutureCallback
            implements FutureCallback<SqlFunctionResult>

View on GitHub (pinned to 55bb57d202)

Solutions

1. Check the failing status code and request URI
2. Fix authentication/proxy issues causing unexpected 4xx responses
3. Verify REST API version compatibility

When it happens

Trigger: Thrown at presto-function-namespace-managers/src/main/java/com/facebook/presto/functionNamespace/rest/RestSqlFunctionExecutor.java:186 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of prestodb/presto@55bb57d202 (2026-09-04). Data as JSON: /api/errors/89d9d1d5c6ceeb73. Report an issue: GitHub.