Help Center > > User Guide> MRS Manager Operation Guide (Applicable to 2.x and Earlier Versions)> Alarm Reference (Applicable to Versions Earlier Than MRS 3.x)> ALM-14007 HDFS NameNode Memory Usage Exceeds the Threshold

ALM-14007 HDFS NameNode Memory Usage Exceeds the Threshold

Updated at: Aug 17, 2021 GMT+08:00

Description

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

This alarm is cleared when the HDFS NameNode 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

If the memory usage of the HDFS NameNode is too high, data read/write performance of HDFS will be affected.

Possible Causes

The HDFS NameNode 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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