Events record changes in your cloud resources, including exceptions, operation outcomes, and status transitions. E-MapReduce (EMR) logs system events for your clusters and synchronizes them with CloudMonitor. You can view events in the EMR console and configure event-triggered alert rules in CloudMonitor.
Limitations
This page displays events only for DataLake, Dataflow, OLAP, DataServing, and custom clusters in EMR on ECS. For events related to Hadoop clusters, see Manage Event Center (Hadoop clusters).
Event types
Health events
A health event is triggered when a service component becomes unhealthy. If you receive a health event, go to the Overview page to investigate and resolve the issue before it affects your workloads. The following table describes the event statuses.
|
Status |
Description |
|
Unhandled |
The service component is in an abnormal state. You need to manually restore its status to Good. |
|
Complete |
The service component is healthy again. |
|
Canceled |
The service component is shut down or released, so its status is unknown. |
The following figure shows the status transitions.
Operation events
Operation events indicate failures or exceptions during user-initiated operations. If you receive an operation event, go to the cluster's Operation History page to find the cause and prevent future failures.
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This view shows only Critical and Warning operation events from the last three days. After you click Ignore or Ignore All Events, these events disappear from the list.
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The All tab shows all events.
Expense events
Expense events notify you when a subscription cluster or its nodes have expired or are about to expire. For these events, go to the renewal page to check the expiration date and renew the subscription promptly to avoid service disruptions.
A renewal can take up to 10 minutes to take effect. To avoid duplicate renewals, wait 10 minutes before refreshing the page to check the event status.
Event levels
System events are classified into the following levels based on their impact on an instance:
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Critical: A major impact that requires immediate attention to prevent service disruption.
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Warning: A moderate impact. Monitor the situation and handle it when convenient.
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Information: Informational updates about event progress. No action is required.
View events
View events in the EMR console
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Log on to the E-MapReduce console.
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In the left-side navigation pane, click Events.
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View unhandled events.
A number next to a category indicates the number of unhandled events.
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To view the details of an event, find the event and click Details in the Actions column.
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Click the All tab to view all events.
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View system events in the CloudMonitor console
To view EMR system events in the CloudMonitor console, select E-MapReduce from the product list. For more information, see View system events.
Related documentation
You can create an event-triggered alert rule in CloudMonitor to receive notifications about EMR system anomalies. For more information, see Create an event-triggered alert rule.