Help Center/ MapReduce Service/ User Guide (Kuala Lumpur Region)/ FusionInsight Manager Operation Guide (Applicable to 3.x)/ Alarm Reference (Applicable to MRS 3.x)/ ALM-45736 Guardian Service Unavailable
Updated on 2022-08-12 GMT+08:00
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ALM-45736 Guardian Service Unavailable

Description

The alarm module checks the Guardian service status every 60 seconds. This alarm is generated if Guardian is unavailable.

This alarm is cleared after Guardian recovers.

Attribute

Alarm ID

Alarm Severity

Auto Clear

45275

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

Guardian cannot work properly.

Possible Causes

  • The Ranger or HDFS service on which Guardian depends is abnormal.
  • The TokenServer role instance is abnormal.

Procedure

Check the Ranger and HDFS service status.

  1. On FusionInsight Manager, choose O&M > Alarm > Alarms. On the displayed page, check whether ALM-45275 Ranger Service Unavailable or ALM-14000 HDFS Service Unavailable is reported.

    • If yes, go to 2.
    • If no, go to 3.

  2. Handle the alarm by referring to section "ALM-45275 Ranger Service Unavailable" or "ALM-14000 HDFS Service Unavailable".

    After the alarm is cleared, wait a few minutes and check whether the alarm GuardianService Unavailable is cleared.
    • If yes, no further action is required.
    • If no, go to 3.

Check all TokenServer instances.

  1. Log in to the node where the TokenServer instance is located as user omm and run the ps -ef|grep "ranger-obs-service" command to check whether the TokenServer process exists on the node.

    • If yes, go to 5.
    • If no, restart the faulty TokenServer instance and go to 4.

  2. In the alarm list, check whether the alarm "Guardian Service Unavailable" is cleared.

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

Collect the 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 Guardian for the target cluster.
  3. Click in the upper right corner, and set Start Date and End Date for log collection to 1 hour ahead of and after the alarm generation time, respectively. Then, click Download.
  4. Contact O&M personnel and provide the collected logs.

Alarm Clearing

This alarm is automatically cleared after the fault is rectified.

Related Information

None