Help Center > > User Guide> MRS Manager Operation Guide> Alarm Reference (Applicable to MRS 2.x or Earlier)> ALM-14008 HDFS DataNode Memory Usage Exceeds the Threshold

ALM-14008 HDFS DataNode Memory Usage Exceeds the Threshold

Updated at: Mar 25, 2021 GMT+08:00

Description

The system checks the HDFS DataNode memory usage every 30 seconds and compares the actual memory usage with the threshold. The HDFS DataNode memory usage has a default threshold. This alarm is generated when the HDFS DataNode memory usage exceeds the threshold.

This alarm is cleared when the HDFS DataNode memory usage is less than or equal to the threshold.

Attribute

Alarm ID

Alarm Severity

Auto Clear

14007

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 HDFS DataNode memory usage is too high, which affects the data read/write performance of the HDFS.

Possible Causes

The HDFS DataNode memory is insufficient.

Procedure

  1. Delete unnecessary files.

    1. Use the client on the cluster node and run the hdfs dfs -rm -r file or directory path command to delete unnecessary files.
    2. Wait 5 minutes and check whether the alarm is cleared.
      • If yes, no further action is required.
      • If no, go to 2.

  2. Collect fault information.

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

Reference

None

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