Help Center/ MapReduce Service/ User Guide (Ankara Region)/ Alarm Reference/ ALM-50213 Number of Tasks Queuing in the FE Thread Pool for Interacting with BE Exceeds the Threshold

Updated on 2024-11-29 GMT+08:00

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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	Alarm Type	Service Type	Auto Cleared
50213	Minor	Quality of service	Doris	Yes

Alarm Parameters

Type	Parameter	Description
Location Information	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.
Additional Information	Detail	Specifies the alarm triggering condition.

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.

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

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