Help Center/ MapReduce Service/ User Guide/ MRS Cluster O&M/ MRS Cluster Alarm Handling Reference/ ALM-12046 Write Packet Dropped Rate Exceeds the Threshold
Updated on 2024-09-23 GMT+08:00
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ALM-12046 Write Packet Dropped Rate Exceeds the Threshold

Alarm Description

The system checks the write packet dropped rate every 30 seconds. This alarm is generated when the write packet dropped rate exceeds the threshold (the default threshold is 0.5%) for multiple times (the default value is 5).

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

If Trigger Count is 1, this alarm is cleared when the network write packet dropped rate is less than or equal to the threshold. If 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.

Alarm Attributes

Alarm ID

Alarm Severity

Auto Cleared

12046

Major

Yes

Alarm Parameters

Parameter

Description

Source

Specifies the cluster or system for which the alarm was generated.

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.

Port Name

Specifies the network port for which the alarm was generated.

Trigger Condition

Specifies the threshold for triggering the alarm.

Impact on the System

  • Latency: Requests are responded slowly and services are delayed.
  • Service failure: Requests cannot be responded or time out. Jobs may fail to run.

Possible Causes

  • The alarm threshold is improperly configured.
  • The network quality is poor.

Handling Procedure

Check whether the threshold is set properly.

  1. Log in to FusionInsight Manager, choose O&M > Alarm > Thresholds > Name of the desired cluster > Host > Network Writing > Write Packet Dropped Rate, and check whether the alarm threshold is configured properly. The default value is 0.5%. You can adjust the threshold as needed.

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

  2. Choose O&M > Alarm > Thresholds > Name of the desired cluster > Host > Network Writing > Write Packet Dropped Rate. Click Modify in the Operation column to change the threshold.

    See Figure 1.

    Figure 1 Configuring the alarm threshold

  3. After 5 minutes, check whether the alarm is cleared.

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

Check whether the network connection is normal.

  1. Contact the network administrator to check whether the network is normal.

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

  2. After 5 minutes, check whether the alarm is cleared.

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

Collect the fault information.

  1. On FusionInsight Manager of the active cluster, choose O&M. In the navigation pane on the left, choose Log > Download.
  2. Select OMS for Service and click OK.
  3. Expand the Hosts dialog box and select the alarm node 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 O&M personnel and provide the collected logs.

Alarm Clearance

This alarm is automatically cleared after the fault is rectified.

Related Information

None