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doc-exports/docs/mrs/umn/ALM-45615.html
Yang, Tong 2195db241c MRS UMN 20231220 version update 
Reviewed-by: Pruthi, Vineet <vineet.pruthi@t-systems.com>
Reviewed-by: Rechenburg, Matthias <matthias.rechenburg@t-systems.com>
Co-authored-by: Yang, Tong <yangtong2@huawei.com>
Co-committed-by: Yang, Tong <yangtong2@huawei.com>
2024-05-16 09:40:21 +00:00

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ALM-45615 CDL Service Unavailable

Description

The system checks the CDL health status every 60 seconds. This alarm is generated when the CDL health status is DOWN. This alarm is cleared when the system detects that the CDL health status is UP.

Attribute

Alarm ID

Alarm Severity

Auto Clear

45615

Critical

Yes

Parameters

Name

Meaning

Source

Specifies the cluster 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.

Impact on the System

The CDL service is abnormal. You cannot use MRS Manager to perform cluster operations on the CDL service. The CDL service function is unavailable.

Possible Causes

All CDLService or CDLConnector instances of the CDL service are abnormal, and the Kafka service is unavailable.

Procedure

Check whether the Kafka service on which the CDL service depends is abnormal.

  1. On MRS Manager, choose O&M > Alarm > Alarms.
  2. In the alarm list, check whether ALM-38000 Kafka Service Unavailable exists.

    • If yes, go to 3.
    • If no, go to 5.

  3. Handle the alarm by referring to "ALM-38000 Kafka Service Unavailable".
  4. After the alarm is cleared, wait a few minutes and check whether the alarm HetuServer Service Unavailable is cleared.

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

Check whether CDL instances are faulty.

  1. On MRS Manager, choose Cluster > Name of the desired cluster > Service > CDL > Instance.
  2. Check whether all CDLService and CDLConnector instances are faulty.

    • If yes, restart the CDL service and choose Cluster > Name of the desired cluster > Services > CDL > More > Restart Service. If the fault persists after the restart, go to 7 and contact O&M personnel to check CDL logs.
    • If no, go to 7.

Collect the fault information.

  1. On MRS Manager, choose O&M. In the navigation pane on the left, choose Log > Download.
  2. Expand the Service drop-down list, and select CDL for the target cluster.
  3. Click in the upper right corner, and set Start Date and End Date for log collection to 30 minutes ahead of and after the alarm generation time respectively. Then, click Download.
  4. Contact O&M personnel and provide the collected logs.

Alarm Clearing

After the service is restored, the system automatically clears the alarm.

Related Information

None