ALM-45003 HetuEngine QAS Disk Capacity Is Insufficient

Alarm Description

The system checks the HetuEngine QAS disk usage every 60 seconds and compares the actual disk usage with the threshold. The disk usage has a default threshold. This alarm is generated if the disk usage exceeds the threshold.

To change the threshold, choose O&M > Alarm > Thresholds. In the service list, choose HetuEngine > Disk > QAS Disk Usage (QAS).

If the Trigger Count is 1, this alarm is cleared when the usage of the HetuEngine QAS disk is less than or equal to the threshold. If the Trigger Count is greater than 1, this alarm is cleared when the disk usage is less than or equal to 80% of the threshold.

Alarm Attributes

Alarm Parameters

Impact on the System

If the disk capacity is insufficient, QAS fails to write data, affecting SQL diagnosis and automatic recommendation of materialized views.

Possible Causes

• The alarm threshold is improperly configured.
• The configuration of the HetuEngine QAS disk cannot meet service requirements. The disk usage reaches the upper limit.

Handling Procedure

Check whether the threshold is set properly.

1. Log in to FusionInsight Manager and choose O&M > Alarm > Thresholds. In the service list, choose HetuEngine > Disk > QAS Disk Usage (QAS). Check whether the alarm threshold is set properly. The default threshold is 80% of the disk capacity. You can change the threshold as required.
   • If the threshold is set properly, go to 4.
   • If the threshold is not set properly, go to 2.

2. Click Modify in the Operation column to modify and save the alarm threshold as required.
3. Wait 2 minutes and check whether the alarm is cleared.
   • If the alarm is cleared, no further action is required.
   • If the alarm is not cleared, go to 4.

Check whether the disk usage reaches the upper limit.

4. Expand the alarm information, view the information in the Location area, and check the role name and host name of the QAS disk where the alarm is generated.
5. Choose Cluster > Services > HetuEngine and click Instance. On the displayed page, click the QAS role name in the alarm information. On the instance page that is displayed, click Chart and check whether the QAS disk usage in the QAS Disk Usage chart exceeds the threshold (80% of the disk capacity by default).
   • If the disk usage reaches the upper limit, go to 6.
   • If the disk usage does not reaches the upper limit, go to 9.

6. Log in to the host of the node where the QAS instance reporting the alarm is located as the root user.
7. Run the following command to go to the QAS data directory and delete temporary files as required:

   cd ${BIGDATA_DATA_HOME}/hetuengine/qas

   

   Deleting temporary files affects the latest QAS execution result but does not affect subsequent results.

8. Wait 2 minutes and check whether the alarm is cleared.
   • If the alarm is cleared, no further action is required.
   • If the alarm fails to be cleared, go to 9.

Collect fault information.

9. On FusionInsight Manager, choose O&M. In the navigation pane on the left, choose Log > Download.
10. Expand the Service drop-down list, select HetuEngine for the target cluster, and click OK.
11. Expand the Hosts drop-down list. In the Select Host dialog box that is displayed, select the hosts to which the role belongs, and click OK.
12. Click the edit icon 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.
13. Contact O&M personnel and provide the collected logs.

Alarm Clearance

This alarm is automatically cleared after the fault is rectified.

Related Information

None.