Help Center/ MapReduce Service/ User Guide/ MRS Cluster O&M/ MRS Cluster Alarm Handling Reference/ ALM-18003 NodeManager Unhealthy (For MRS 2.x or Earlier)
Updated on 2024-09-23 GMT+08:00
View PDF
Share

ALM-18003 NodeManager Unhealthy (For MRS 2.x or Earlier)

Description

The system checks the number of abnormal NodeManager nodes every 30 seconds, and compares the number of abnormal nodes with the threshold. The Unhealthy Nodes indicator has a default threshold. This alarm is generated when the value of the Unhealthy Nodes indicator exceeds the threshold.

This alarm is cleared when the value of Unhealthy Nodes is less than or equal to the threshold.

Attribute

Alarm ID

Alarm Severity

Auto Clear

18003

Major

Yes

Parameters

Parameter

Description

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

Generates an alarm when the actual indicator value exceeds the specified threshold.

Impact on the System

  • The faulty NodeManager node cannot provide the Yarn service.
  • The number of containers decreases, so the cluster performance deteriorates.

Possible Causes

  • The disk space of the host where the NodeManager node resides is insufficient.
  • User omm does not have the permission to access a local directory on the NodeManager node.

Procedure

  1. Collect fault information.

    1. On MRS Manager, choose System > Export Log.
    2. Contact the O&M engineers and send the collected logs.

Reference

None