Help Center> MapReduce Service> User Guide> Alarm Reference (Applicable to MRS 3.x)> ALM-50213 Number of Tasks Queuing in the FE Thread Pool for Interacting with BE Exceeds the Threshold
Updated on 2023-10-10 GMT+08:00
View PDF

ALM-50213 Number of Tasks Queuing in the FE Thread Pool for Interacting with BE Exceeds the Threshold

Alarm Description

The system checks the number of queuing tasks in the FE thread pool for interacting with BE every 30 seconds. This alarm is generated when the number of queuing tasks exceeds the threshold (10 by default). This FE thread pool is the working thread pool of ThriftServer. It is specified by rpc_port in the fe.conf file and is used to interact with BE.

This alarm is cleared when the system detects that the number of tasks queuing in the FE thread pool for interacting with BE is less than the threshold.

Alarm Attributes

Alarm ID

Alarm Severity

Auto Cleared

50213

Minor

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

The read and write of the Doris service slows down.

Possible Causes

There are a large number of concurrent service requests, causing too many queuing tasks.

Handling Procedure

Check whether the alarm threshold or alarm trigger count is properly configured.

  1. Log in to FusionInsight Manager, choose O&M > Alarm > Thresholds, click the name of the desired cluster, and choose Doris > Queue > Number of tasks that are queuing in the thread pool for interaction between the FE and the BE (FE).
  2. Click the edit button next to Trigger Count, change the number based on site requirements, and click OK.
  3. Click Modify in the Operation column, change the alarm threshold based on site requirements, and click OK.
  4. Wait 2 minutes and check whether the alarm is automatically cleared.

    • If yes, no further action is required.
    • If no, go to 5.

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.