Help Center/ MapReduce Service/ User Guide/ Alarm Reference (Applicable to MRS 3.x)/ ALM-26052 Number of Available Supervisors of the Storm Service Is Less Than the Threshold
Updated on 2022-09-26 GMT+08:00
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ALM-26052 Number of Available Supervisors of the Storm Service Is Less Than the Threshold

Description

The system periodically checks the number of available Supervisors every 60 seconds and compares the number of available Supervisors with the threshold. This alarm is generated when the number of available Supervisors is less than the threshold.

You can change the threshold in O&M > Alarm > Thresholds > Name of the desired cluster.

This alarm is cleared when the number of available Supervisors is greater than or equal to the threshold.

Attribute

Alarm ID

Alarm Severity

Automatically Cleared

26052

Major

Yes

Parameters

Name

Meaning

Source

Specifies the cluster for which the alarm is generated.

ServiceName

Specifies the service for which the alarm is generated.

RoleName

Specifies the role for which the alarm is generated.

HostName

Specifies the host for which the alarm is generated.

Trigger condition

Specifies the threshold triggering the alarm. If the current indicator value exceeds this threshold, the alarm is generated.

Impact on the System

Existing tasks in the cluster cannot be performed. The cluster can receive new Storm tasks, but cannot perform these tasks.

Possible Causes

The status of some Supervisors in the cluster is abnormal.

Procedure

Check the Supervisor status.

  1. Choose Cluster > Name of the desired cluster > Services > Storm > Supervisor to go to the Storm service management page.
  2. In Roles, check whether any instance whose status is Faulty or Restoring exists.

    • If yes, go to 3.
    • If no, go to 5.

  3. Select Supervisor role instances whose status is Faulty or Restoring, choose More > Restart Instance, and check whether the instances restart successfully.

    • If yes, go to 4.
    • If no, go to 5.

  4. Wait for 30 seconds, and check whether the alarm is cleared.

    • If yes, no further action is required.
    • If no, go to 5.

      Services are interrupted when the Supervisor is being restarted. Then, services are restored after the restarting.

Collect fault information.

  1. On the FusionInsight Manager portal, choose O&M > Log > Download.
  2. Select Storm and ZooKeeper in the required cluster from the Service drop-down list box.
  3. Click in the upper right corner, and set Start Date and End Date for log collection to 1 hour ahead of and after the alarm generation time, respectively. Then, click Download.
  4. Contact the O&M personnel and send the collected logs.

Alarm Clearing

After the fault is rectified, the system automatically clears this alarm.

Related Information

None