PengJingzhao commented on issue #9219:
URL: https://github.com/apache/rocketmq/issues/9219#issuecomment-2753050253
I have carefully reviewed your issue. It seems that the problem might be due
to communication issues or state synchronization abnormalities between the
Dashboard and the RocketMQ cluster. Here are my suggestions:
### Possible Issues:
1. **Consumer and producer states are not properly synchronized to the
Broker**
- The consumer group might be offline because the consumers are not
sending heartbeats to the Broker or the Dashboard cannot correctly access the
Broker’s status data.
- The producer group might not exist because the Dashboard is unable to
retrieve the producer’s status information.
2. **RocketMQ Dashboard and RocketMQ cluster communication issues**
- The Dashboard relies on the state information of the NameServer and the
Broker. There might be network communication issues preventing the Dashboard
from accessing the correct state.
3. **RocketMQ cluster and Kubernetes network configuration issues**
- When deployed in Kubernetes, there might be external access or DNS
configuration issues, causing communication failures between the Dashboard and
the Broker. Typical problems include:
- NameServer and Broker address resolution issues (e.g., internal IPs
being returned).
- Incorrect `brokerIP1` or `advertisedAddr` configuration in the
cluster.
- Incorrect `ROCKETMQ_NAMESRV_ADDR` configuration in the Dashboard,
which does not point to the correct NameServer.
4. **The Broker does not support retrieving consumer/producer group states**
- Some RocketMQ versions rely on consumer and producer heartbeats to
detect their states. By default, RocketMQ only records the state after
heartbeats are sent.
### Solutions:
1. **Check and confirm your network configuration**
- Ensure that the RocketMQ deployment on Kubernetes is functioning
properly.
- Verify communication between the NameServer and the Broker:
```bash
kubectl exec -it <broker-pod> -- curl http://<nameserver>:9876
```
- Ensure that the `ROCKETMQ_NAMESRV_ADDR` configuration of the Dashboard
is correct:
- The RocketMQ NameServer address needs to be configured as an
environment variable `ROCKETMQ_NAMESRV_ADDR` in the Dashboard container.
- Check the configuration of the Dashboard:
```bash
kubectl describe pod <dashboard-pod>
```
Ensure that `ROCKETMQ_NAMESRV_ADDR` points to the correct NameServer
address (e.g., `rocketmq-nameserver.default.svc.cluster.local:9876`).
2. **Check the Broker configuration**
- Ensure that `brokerIP1` and `advertisedAddr` in the Broker
configuration are set correctly and point to the cluster's accessible address
(not the container's private IP address).
- In `broker.conf`, set:
```plaintext
brokerIP1=<accessible IP>
brokerClusterName=DefaultCluster
```
- If using Helm, you can configure `brokerIP1` and `advertisedAddr` in
the `values.yaml` file.
- Check if the `broker.conf` configuration is complete, especially these
key configurations:
```plaintext
namesrvAddr=<NameServer address, e.g.,
rocketmq-nameserver.default.svc.cluster.local:9876>
listenPort=10911
```
- Restart the Broker and observe whether the Broker and NameServer are
successfully registered.
3. **Check the status of consumers and producers**
- Consumer group status:
- Consumer group status requires heartbeats to be sent to the Broker by
the consumers. If consumers are not started properly or have not sent
heartbeats for a long time, the consumer group will appear offline.
- Ensure that the consumer application is running properly and
consuming messages. Check the logs to see if the consumer is working correctly.
- Producer status:
- RocketMQ does not store static information about producer groups. The
Broker only records a producer group after it sends messages.
- Ensure that the producer application sends messages to the specified
Topic and check the producer logs for any abnormalities.
4. **Retrieve consumer and producer states manually**
- Use command-line tools to manually retrieve the state of consumers and
producers to confirm if the issue lies with the Dashboard:
- Retrieve the consumer group status:
```bash
kubectl exec -it <broker-pod> -- bash
sh mqadmin consumerStatus -n <nameserver address> -g <consumerGroup>
```
- Retrieve the producer group status:
```bash
sh mqadmin producerConnection -n <nameserver address> -g
<producerGroup>
```
5. **Check the compatibility of the Dashboard version**
- You are using Dashboard version `1.0.0`, while the Broker is version
`5.3.0`. The Dashboard version is relatively old, which might cause
compatibility issues.
- Try upgrading the Dashboard to a version compatible with RocketMQ 5.3.0
(e.g., `dashboard 1.1.0` or higher).
6. **Check logs**
- NameServer logs: Check if the NameServer has successfully registered
the Brokers and Consumers:
```bash
kubectl logs <nameserver-pod>
```
- Broker logs: Check if the Broker is receiving heartbeats from Consumers
and Producers:
```bash
kubectl logs <broker-pod>
```
- Dashboard logs: Check if the Dashboard can access the NameServer and
Brokers:
```bash
kubectl logs <dashboard-pod>
```
7. **Enable Debug Mode on the Dashboard**
- If the issue persists, you can try enabling debug mode on the RocketMQ
Dashboard to get more detailed logs:
- Modify the startup command of the Dashboard to add the debug flag:
```plaintext
JAVA_OPTS="-Drocketmq.console.debug=true"
```
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