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

Collect fault information.
1. On MRS Manager, choose System > Export Log.
2. Contact technical support engineers for help. For details, see technical support.

Reference

None