Help Center/ MapReduce Service/ User Guide/ MRS Cluster O&M/ MRS Cluster Alarm Handling Reference/ ALM-20002 Hue Service Unavailable (For MRS 2.x or Earlier)
Updated on 2024-09-23 GMT+08:00
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ALM-20002 Hue Service Unavailable (For MRS 2.x or Earlier)

Description

The system checks the Hue service status every 60 seconds. This alarm is generated if the Hue service is unavailable.

This alarm is cleared when the Hue service is normal.

Attribute

Alarm ID

Alarm Severity

Automatically Cleared

20002

Critical

Yes

Parameters

Parameter

Description

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 system cannot provide data loading, query, and extraction services.

Possible Causes

  • The KrbServer service on which Hue depends is abnormal.
  • The DBService service on which Hue depends is abnormal.
  • The network connection to DBService is abnormal.

Procedure

Check whether the KrbServer service is normal.

  1. Go to the MRS cluster details page and click Components.
  2. In the service list, check whether Health Status of KrbServer is Good.

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

  3. Click Restart in the Operation column of the KrbServer service to restart the service.
  4. Wait for several minutes. Check whether ALM-20002 Hue Service Unavailable is cleared.

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

Check whether DBService is normal.

  1. Go to the MRS cluster details page and click Components.
  2. In the service list, check whether Health Status of DBService is Good.

    • If yes, go to 9.
    • If no, go to 7.

  3. Click Restart in the Operation column of the DBService service to restart the service.

    To restart the service, you need to enter the password of the MRS Manager administrator and select Start or restart related services .

  4. Wait for several minutes. Check whether ALM-20002 Hue Service Unavailable is cleared.

    • If yes, no further action is required.
    • If no, go to 9.

Check whether the network connected to DBService is normal.

  1. Choose Components > Hue > Instance and record the IP address of the active Hue node.
  2. Use PuTTY to log in to the active Hue.
  3. Run the ping command to check whether the network connection between the host where the active Hue is located and the host where DBService is located is normal. (The method of obtaining the DBService service IP address is the same as that of obtaining the active Hue IP address.)

    • If yes, go to 17.
    • If no, go to 12.

  4. Contact the network administrator to repair the network.
  5. Wait for several minutes. Check whether ALM-20002 Hue Service Unavailable is cleared.

    • If yes, no further action is required.
    • If no, go to 17.

    Collect fault information.

  6. On MRS Manager, choose System > Export Log.
  7. Select the following nodes from the Services drop-down list and click OK.

    • Hue
    • Controller

  8. Set Start Time and End Time for log collection to 10 minutes before and after the alarm is generated, select an export type, and click OK to collect the corresponding fault log information.

Restart Hue.

  1. Choose Components > Hue.
  2. Choose More > Restart Service and click OK.
  3. Check whether the alarm is cleared.

    • If yes, no further action is required.
    • If no, go to 20.

  1. Collect fault information.

    1. On MRS Manager, choose System > Export Log.
    2. Contact the O&M engineers and send the collected logs.

Reference

None