Help Center/ MapReduce Service/ User Guide (ME-Abu Dhabi Region)/ Managing an Existing Cluster/ Health Check Management/ Storm Health Check Indicators
Updated on 2022-02-22 GMT+08:00
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Storm Health Check Indicators

Number of Working Nodes

Indicator: Number of Supervisors

Description: This indicator is used to check the number of available Supervisors in a cluster. If the number of available Supervisors in a cluster is less than 1, the cluster is unhealthy.

Recovery Guide: If the indicator is abnormal, go to the Streaming service instance page and click the host name of the unavailable Supervisor instance. View the host health status in the Overview area. If the host health status is Good, rectify the fault by referring to ALM-12007 Process Faults. If the status is not Good, rectify the fault by referring to the handling procedure of the ALM-12006 Node Faults.

Number of Idle Slots

Indicator: Number of Idle Slots

Description: This indicator is used to check the number of idle slots in a cluster. If the number of idle slots in a cluster is less than 1, the cluster is unhealthy.

Recovery Guide: If the indicator is abnormal, go to the Storm service instance page and check the health status of the Supervisor instance. If the health status of all Supervisor instances is Good, you need to expand the capacity of the Core node in the cluster. If not, rectify the fault by referring to ALM-12007 Process Faults.

Service Health Status

Indicator: Service Health Status

Description: This indicator is used to check whether Storm service status is normal. If the status is abnormal, the service is unhealthy.

Recovery Guide: If the indicator is abnormal, rectify the fault by referring to the alarm "ALM-26051 Storm Service Unavailable".

Checking Alarms

Indicator: Alarm Information

Description: This indicator is used to check whether alarms exist. If alarms exist, the service is unhealthy.

Recovery Guide: If this indicator is abnormal, you can rectify the fault by referring to the alarm handling guide.

Parent topic: Health Check Management