Description

The system checks the available disk space of each NodeManager node every 30 seconds and compares the disk availability rate with the threshold. A default threshold range is provided for the NodeManager Disk Usability Ratio. This alarm is generated when the system detects that the actual NodeManager Disk Usability Ratio is lower than the threshold.

This alarm is automatically cleared when the value of NodeManager Disk Usability Ratio is greater than the threshold.

Attribute

Alarm ID	Alarm Severity	Auto Clear
18004	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	Specifies the threshold for triggering the alarm.

Impact on the System

The NodeManager node whose disk availability rate is lower than the threshold may fail to provide the Yarn service.
The number of containers decreases, so the cluster performance may deteriorate.

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