Help Center> MapReduce Service> User Guide (ME-Abu Dhabi Region)> MRS Manager Operation Guide (Applicable to 2.x and Earlier Versions)> Alarm Reference (Applicable to Versions Earlier Than MRS 3.x)> ALM-14004 Number of Damaged HDFS Blocks Exceeds the Threshold
Updated on 2022-12-08 GMT+08:00
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ALM-14004 Number of Damaged HDFS Blocks Exceeds the Threshold

Description

The system checks the number of damaged blocks every 30 seconds and compares the number of damaged blocks with the threshold. The damaged blocks indicator has a default threshold. This alarm is generated when the number of damaged blocks exceeds the threshold.

This alarm is cleared when the number of damaged blocks is less than or equal to the threshold. You are advised to run the hdfs fsck / command to check whether any file is completely damaged.

Attribute

Alarm ID

Alarm Severity

Auto Clear

14004

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.

NSName

Specifies the NameService service for which the alarm is generated.

Trigger condition

Generates an alarm when the actual indicator value exceeds the specified threshold.

Impact on the System

Data is damaged and HDFS fails to read files.

Possible Causes

  • The DataNode instance is abnormal.
  • Data verification information is damaged.

Procedure

  1. Collect fault information.

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

Reference

None