apache/shenyu · error · AlertNoticeException

[DingTalk Notify Error] " + e.getMessage()

Error message

[DingTalk Notify Error] " + e.getMessage()

What it means

Catch-all in DingTalkRobotAlertNotifyStrategy.send: any Exception during building/sending the request (serialization, IO, timeout, NPE on body) is rethrown as AlertNoticeException("[DingTalk Notify Error] " + e.getMessage()). It indicates the notification pipeline failed before/at the HTTP call, and it also swallows the earlier AlertNoticeExceptions by re-wrapping them.

Solutions

1. Check application logs for the root stack trace (the cause is preserved in the wrapping catch)
2. Test webhook connectivity (timeout/DNS) from the host running the alert sender
3. Increase RestTemplate connect/read timeouts if failures occur under load
4. Handle empty/invalid response bodies explicitly instead of relying on requireNonNull

Example fix

// before
catch (Exception e) {
    throw new AlertNoticeException("[DingTalk Notify Error] " + e.getMessage());
}
// after
catch (AlertNoticeException e) {
    throw e;
} catch (Exception e) {
    throw new AlertNoticeException("[DingTalk Notify Error] " + e.getMessage(), e);
}

// ensure webhook url set and network reachable before sending
Objects.requireNonNull(webHookUrl, "dingtalk webhook url must be set");

try {
    strategy.send(config, alert);
} catch (AlertNoticeException e) {
    log.error("DingTalk notify failed: {}", e.getMessage(), e);
    // use alternate notification strategy (email/sms)
}

When it happens

Trigger: Any exception inside send(): RestTemplate IO error, connect/read timeout, JSON serialization failure of the alert payload, or Objects.requireNonNull(responseEntity.getBody()) NPE on an empty body.

Common situations: Network outages or DNS failures reaching oapi.dingtalk.com; request timeouts under load; body unexpectedly empty so requireNonNull throws; alert content with characters that break serialization.

Related errors

• responseEntity.getBody().getErrMsg()
• Http StatusCode " + responseEntity.getStatusCode()
• Import mcp server config failed:
• Failed to get Swagger document, HTTP status code:
• Access to private or internal IP addresses is not allowed

AI-assisted analysis of apache/shenyu@567142e072 (2026-09-12). Data as JSON: /api/errors/6b76d556b7e71801. Report an issue: GitHub.

Appendix: source

Thrown at shenyu-alert/src/main/java/org/apache/shenyu/alert/strategy/DingTalkRobotAlertNotifyStrategy.java:71

            headers.setContentType(MediaType.APPLICATION_JSON);
            HttpEntity<DingTalkWebHookDto> httpEntity = new HttpEntity<>(dingTalkWebHookDto, headers);
            String webHookUrl = DING_TALK_WEB_HOOK_URL + receiver.getAccessToken();
            ResponseEntity<CommonRobotNotifyResp> responseEntity = getRestTemplate().postForEntity(webHookUrl,
                    httpEntity, CommonRobotNotifyResp.class);
            if (responseEntity.getStatusCode() == HttpStatus.OK) {
                Objects.requireNonNull(responseEntity.getBody());
                if (responseEntity.getBody().getErrCode() == 0) {
                    log.debug("Send dingTalk webHook: {} Success", webHookUrl);
                } else {
                    log.warn("Send dingTalk webHook: {} Failed: {}", webHookUrl, responseEntity.getBody().getErrMsg());
                    throw new AlertNoticeException(responseEntity.getBody().getErrMsg());
                }
            } else {
                log.warn("Send dingTalk webHook: {} Failed: {}", webHookUrl, responseEntity.getBody());
                throw new AlertNoticeException("Http StatusCode " + responseEntity.getStatusCode());
            }
        } catch (Exception e) {
            throw new AlertNoticeException("[DingTalk Notify Error] " + e.getMessage());
        }
    }
    
    @Override
    public byte type() {
        return 5;
    }
    
    @Override
    protected String templateName() {
        return "alertNotifyDingTalkRobot";
    }
    
    /**
     * DingDing body.
     */
    private static class DingTalkWebHookDto {
        private static final String MARKDOWN = "markdown";

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