Diagnosing a RocketMQ Instance
You can diagnose an instance to quickly locate faults when message consumption is slow or fails.
Video Tutorial
This video shows how to diagnose a RocketMQ instance.
Prerequisites
- A consumer group has been created, and there are consumers in the group.
- A topic has been created.
Procedure
- Log in to the console.
- Click
in the upper left corner to select a region.
DMS for RocketMQ instances in different regions cannot communicate with each other over an intranet. Select a nearest location for low latency and fast access.
- Click
and choose Middleware > Distributed Message Service for RocketMQ to open the console of DMS for RocketMQ.
- Click a RocketMQ instance to go to the instance details page.
- In the navigation pane on the left, choose Analysis & Diagnosis > Instance Diagnosis.
- Select a consumer group and click Start Diagnose.
After the diagnosis is complete, a diagnosis record is displayed in the Diagnosis Reports area.
- Click View to view the diagnosis result.
The result contains the active status, number of consumers, subscription consistency, and message accumulation.
Figure 1 Diagnosis resultIf the consumer group is not online, the diagnosis is successful, but one abnormality is displayed.
Exporting Diagnosis Records
- Log in to the console.
- Click
in the upper left corner to select a region.
DMS for RocketMQ instances in different regions cannot communicate with each other over an intranet. Select a nearest location for low latency and fast access.
- Click
and choose Middleware > Distributed Message Service for RocketMQ to open the console of DMS for RocketMQ.
- Click a RocketMQ instance to go to the instance details page.
- In the navigation pane on the left, choose Analysis & Diagnosis > Instance Diagnosis.
- Export instance diagnosis records in either of the following ways:
- Select the desired records and choose Export > Export selected data to an XLSX file.
- Choose Export > Export all data to an XLSX file to export all the records.
Deleting Diagnosis Records
- Log in to the console.
- Click
in the upper left corner to select a region.
DMS for RocketMQ instances in different regions cannot communicate with each other over an intranet. Select a nearest location for low latency and fast access.
- Click
and choose Middleware > Distributed Message Service for RocketMQ to open the console of DMS for RocketMQ.
- Click a RocketMQ instance to go to the instance details page.
- In the navigation pane on the left, choose Analysis & Diagnosis > Instance Diagnosis.
- Use either of the following methods to delete diagnosis records:
- In the row containing the record you want to delete, click Delete.
- Select multiple records you want to delete and click Delete above the record list.
- In the confirmation dialog box, click Yes.
Related Documents
- To handle message accumulation excess, see Handling Message Accumulation.
- To handle subscription inconsistency, see Ensuring Subscription Consistency.
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