Help Center/ MapReduce Service/ User Guide/ MRS Cluster O&M/ MRS Cluster Alarm Handling Reference/ ALM-50407 Failure Rate of the JobServer Job Query API Exceeds the Threshold
Updated on 2024-12-06 GMT+08:00
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ALM-50407 Failure Rate of the JobServer Job Query API Exceeds the Threshold

This section applies only to MRS 3.5.0 or later.

Alarm Description

The system checks the failure rate of the JobServer job query API every 30 seconds. This alarm is generated when the failure rate exceeds the threshold (80% by default).

This alarm is cleared when the failure rate falls below the threshold.

Alarm Attributes

Alarm ID

Alarm Severity

Auto Cleared

50407

Critical

Yes

Alarm Parameters

Parameter

Description

Source

Specifies the cluster or system for which the alarm was generated.

ServiceName

Specifies the service for which the alarm was generated.

RoleName

Specifies the role for which the alarm was generated.

HostName

Specifies the host for which the alarm was generated.

Impact on the System

A job may fail to be queried, for example, through the REST API.

Possible Causes

The JobServer instance on the node is abnormal.

Handling Procedure

  1. On FusionInsight Manager, choose O&M > Alarm > Alarms, expand details of this alarm in the right pane, and obtain HostName of the node for which the alarm is generated in Location.
  1. On FusionInsight Manager, choose Cluster > Services > JobGateway > Instances.
  2. Select the instance for which the alarm is generated, click More, and select Instance Rolling Restart.

    Services may be affected or interrupted during the restart. You are advised to perform the restart during off-peak hours.

  3. Check whether the instance running status is normal after the restart.

    • If yes, go to 5.
    • If no, go to 6.

  4. Choose O&M > Alarm > Alarms and check whether the alarm is cleared.

    • If yes, no further action is required.
    • If no, go to 6.

Collect fault information.

  1. On FusionInsight Manager, choose O&M. In the navigation pane on the left, choose Log > Download.
  2. Expand the Service drop-down list, and select JobGateway for the target cluster.
  3. Click in the upper right corner, and set Start Date and End Date for log collection to 10 minutes ahead of and after the alarm generation time, respectively. Then, click Download.
  1. Contact O&M personnel and provide the collected logs.

Alarm Clearance

This alarm is automatically cleared after the fault is rectified.

Related Information

None.