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-12046 Network Write Packet Dropped Rate Exceeds the Threshold
Updated on 2022-12-14 GMT+08:00
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ALM-12046 Network Write Packet Dropped Rate Exceeds the Threshold

Description

The system checks the network write packet dropped rate every 30 seconds and compares the actual packet dropped rate with the threshold (the default threshold is 0.5%). This alarm is generated when the system detects that the network write packet dropped rate exceeds the threshold for several times (5 times by default) consecutively.

To change the threshold, choose O&M > Alarm > Thresholds > Name of the desired cluster > Host > Network Writing > Write Packet Dropped Rate.

When the Trigger Count is 1, this alarm is cleared when the network write packet dropped rate is less than or equal to the threshold. When the Trigger Count is greater than 1, this alarm is cleared when the network write packet dropped rate is less than or equal to 90% of the threshold.

Attribute

Alarm ID

Alarm Severity

Auto Clear

12046

Major

Yes

Parameters

Name

Meaning

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.

NetworkCardName

Specifies the network port for which the alarm is generated.

Trigger Condition

Specifies the threshold triggering the alarm. If the current indicator value exceeds this threshold, the alarm is generated.

Impact on the System

The service performance deteriorates or services time out.

Possible Causes

  • The alarm threshold is set improperly.
  • The cluster network environment is of poor quality.

Procedure

Check whether the threshold is set properly.

  1. On the FusionInsight Manager, choose O&M > Alarm > Thresholds > Name of the desired cluster > Host > Network Writing > Write Packet Dropped Rate to check whether the alarm threshold is set properly. (By default, 0.5% is a proper value. However, users can configure the value as required.)

    • If yes, go to 4.
    • If no, go to 2.

  2. Based on actual usage condition, choose O&M > Alarm > Thresholds > Name of the desired cluster > Host > Network Writing > Write Packet Dropped Rate and click Modify in the Operation column to modify the alarm threshold.

    For details, see Figure 1.

    Figure 1 Setting alarm thresholds

  3. Wait for 5 minutes, and check whether the alarm is cleared.

    • If yes, no further action is required.
    • If no, go to 4.

Check whether the network is normal.

  1. Contact the system administrator to check whether the network is abnormal.

    • If yes, go to 5 to rectify the network fault.
    • If no, go to 6.

  2. Wait for 5 minutes, and check whether the alarm is cleared.

    • If yes, no further action is required.
    • If no, go to 6.

Collect fault information.

  1. On the FusionInsight Manager home page of the active cluster, choose O&M > Log > Download.
  2. Select OMS from the Service and click OK.
  3. Set Host to the node for which the alarm is generated and the active OMS node.
  4. 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.
  5. Contact the O&M personnel and send the collected log information.

Alarm Clearing

After the fault is rectified, the system automatically clears this alarm.

Related Information

None