Help Center/ MapReduce Service/ User Guide/ MRS Cluster O&M/ MRS Cluster Alarm Handling Reference/ ALM-50216 Memory Usage of the FE Node Exceeds the Threshold
Updated on 2024-09-23 GMT+08:00
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ALM-50216 Memory Usage of the FE Node Exceeds the Threshold

Alarm Description

The system checks the memory usage of the FE node every 30 seconds. This alarm is generated when the memory usage exceeds the threshold (95% by default).

This alarm is cleared when the memory usage of the FE node falls below the threshold.

Alarm Attributes

Alarm ID

Alarm Severity

Auto Cleared

50216

Critical

Yes

Alarm Parameters

Parameter

Description

Source

Specifies the cluster or system for which the alarm is generated.

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

Specifies the threshold for triggering the alarm.

Impact on the System

Task execution and client connection to the FE are affected.

Possible Causes

The FE heap memory is too small.

Handling Procedure

Check the FE heap memory usage.

  1. Log in to FusionInsight Manager, choose O&M > Alarm > Thresholds, select the name of the desired cluster, and choose Doris > CPU and Memory > Memory usage of the FE node (FE).

    1. Click the edit button next to Trigger Count, change the number based on site requirements, and click OK.
    2. Click Modify in the Operation column, change the alarm threshold based on site requirements, and click OK.

  2. Log in to the FE node for which the alarm is generated as user omm, run the top command to check the memory usage of processes, locate the process with high memory usage, and check whether the process belongs to the current service and is running properly.

    • If yes, go to 3.
    • If no, isolate or stop the process, or adjust the memory size, and check whether the memory is released.

  3. Restart the affected services or instances and check whether the alarm is cleared.

    • If yes, no further action is required.
    • If no, go to 4.
    • During the restart of the Doris service, the Doris service is unavailable and cannot provide services for external systems. Tasks connected to the Doris service fail.
    • During instance restart, the tasks running on the nodes of the instance will fail. The tasks on instance nodes that are not restarted are not affected.

Collect fault information.

  1. On FusionInsight Manager, choose O&M. In the navigation pane on the left, choose Log > Download.
  2. Expand the Service drop-down list, and select Doris for the target cluster.
  3. 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.
  4. Contact O&M personnel and provide the collected logs.

Alarm Clearance

This alarm is automatically cleared after the fault is rectified.

Related Information

None.