Help Center/ MapReduce Service/ User Guide/ MRS Cluster O&M/ MRS Cluster Alarm Handling Reference/ ALM-18004 NodeManager Disk Usability Ratio Is Lower Than the Threshold (For MRS 2.x or Earlier)
Updated on 2024-09-23 GMT+08:00
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ALM-18004 NodeManager Disk Usability Ratio Is Lower Than the Threshold (For MRS 2.x or Earlier)

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

  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