Help Center/ MapReduce Service/ User Guide/ Alarm Reference (Applicable to MRS 3.x)/ ALM-44004 Presto Coordinator Resource Group Queuing Tasks Exceed the Threshold
Updated on 2024-04-11 GMT+08:00
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ALM-44004 Presto Coordinator Resource Group Queuing Tasks Exceed the Threshold

Alarm Description

This alarm is generated when the system detects that the number of queuing tasks in a resource group exceeds the threshold. The system queries the number of queuing tasks in a resource group through the JMX interface. You can choose Components > Presto > Service Configuration (switch Basic to All) > Presto > resource-groups to configure a resource group. You can choose Components > Presto > Service Configuration (switch Basic to All) > Coordinator > Customize > resourceGroupAlarm to configure the threshold of each resource group.

Alarm Attributes

Alarm ID

Alarm Severity

Auto Cleared

44004

Major

Yes

Alarm Parameters

Parameter

Description

ServiceName

Specifies the service for which the alarm was generated.

RoleName

Specifies the role for which the alarm was generated.

HostName

Specifies the host for which the alarm was generated.

Impact on the System

If the number of queuing tasks in a resource group exceeds the threshold, a large number of tasks may be in the queuing state. The Presto task time exceeds the expected value. When the number of queuing tasks in a resource group exceeds the maximum number (maxQueued) of queuing tasks in the resource group, new tasks cannot be executed.

Possible Causes

The resource group configuration is improper or too many tasks in the resource group are submitted.

Handling Procedure

  1. Choose Components > Presto > Service Configuration (switch Basic to All) > Presto > resource-groups to adjust the resource group configuration.
  2. You can choose Components > Presto > Service Configuration (switch Basic to All) > Coordinator > Customize > resourceGroupAlarm to modify the threshold of each resource group.
  3. Collect the fault information.

    1. Log in to the cluster node based on the host name in the fault information and query the number of queuing tasks based on Resource Group in the additional information on the Presto client.
    2. Log in to the cluster node based on the host name in the fault information, view the /var/log/Bigdata/nodeagent/monitorlog/monitor.log file, and search for resource group information to view the monitoring collection information of the resource group.
    3. Contact O&M personnel and send the collected logs.

Related Information

None