Help Center/ MapReduce Service/ User Guide/ MRS Cluster O&M/ MRS Cluster Alarm Handling Reference/ ALM-18026 Number of Failed Yarn Tasks Exceeds the Threshold
Updated on 2024-09-23 GMT+08:00
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ALM-18026 Number of Failed Yarn Tasks Exceeds the Threshold

Description

The alarm module checks the number of failed applications in the Yarn root queue every 60 seconds. The alarm is generated when the number exceeds 50 for three consecutive times.

Attribute

Alarm ID

Alarm Severity

Auto Clear

18026

Major

Yes

Parameters

Name

Meaning

Cluster Name

Specifies the cluster for which the alarm is generated.

Service Name

Specifies the service for which the alarm is generated.

Role Name

Specifies the role for which the alarm is generated.

HostName

Specifies the host for which the alarm is generated.

Trigger Condition

Specifies the threshold triggering the alarm. If the current indicator value exceeds this threshold, the alarm is generated.

Impact on the System

  • A large number of application tasks fail to be executed.
  • Failed tasks need to be submitted again.

Possible Causes

The task fails to be executed due to some error.

Procedure

Check the alarm details.

  1. On the FusionInsight Manager portal, choose O&M > Alarm > Alarms to go to the alarm page.
  2. View Additional Information in the alarm details to check whether the alarm threshold is too small.

    • If yes, go to 3.
    • If no, go to 4.

  3. Choose O&M > Alarm > Thresholds > Name of the desired cluster > Yarn > Other > Failed Applications of root queue to modify the threshold. Go to 6.
  4. Choose Cluster > Name of the desired cluster > Services > Yarn > ResourceManager(Active) to access the ResourceManager web UI.
  5. Click FAILED in Applications and click the task on the top. View the description of Diagnostics and rectify the fault based on the task failure causes.

    Figure 1 Click FAILED

  6. Wait for 3 minutes and check whether the alarm is cleared.

    • If yes, no further action is required.
    • If no, go to 7.

Collect the fault information.

  1. On the FusionInsight Manager, choose O&M > Log > Download.
  2. Expand the Service drop-down list, and select Yarn for the target cluster.
  3. Click in the upper right corner, and set Start Date and End Date for log collection to 10 minutes ahead of and after the alarm generation time, respectively. Then, click Download.
  4. Contact the O&M personnel and send the collected logs.

Alarm Clearing

After the fault is rectified, the system automatically clears this alarm.

Related Information

None