private void logErrorToSendLog(final Duration duration,
                                   final Exception e,
                                   final String exceptionMessage,
                                   final AttributeMap attributeMap) {
        LOGGER.debug(() -> LogUtil.message("'{}' - {}", forwarderName, exceptionMessage, e));
        logStream.log(
                SEND_LOG,
                attributeMap,
                EventType.ERROR,
                forwardUrl,
                StroomStatusCode.UNKNOWN_ERROR,
                null,
                0,
                duration.toMillis(),
                LogUtil.exceptionMessage(e));
    }
Handler class that forwards the request to a URL.
stroom-proxy/stroom-proxy-app/src/main/java/stroom/proxy/app/handler/HttpSender.java