Help Center > > User Guide> FusionInsight Manager Operation Guide (Applicable to 3.x)> Alarm Reference (Applicable to MRS 3.x)> ALM-24007 Flume Server Direct Memory Usage Exceeds the Threshold

ALM-24007 Flume Server Direct Memory Usage Exceeds the Threshold

Updated at: Mar 25, 2021 GMT+08:00

Description

The system checks the direct memory usage of the Flume service every 60 seconds. The alarm is generated when the direct memory usage of a Flume instance exceeds the threshold (80% of the maximum memory) for 5 consecutive times. The alarm is cleared when the direct memory usage is less than or equal to the threshold.

Attribute

Alarm ID

Alarm Severity

Automatically Cleared

24007

Major

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.

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 direct memory overflow may cause a service breakdown.

Possible Causes

The direct memory of the Flume instance is overused or the direct memory is inappropriately allocated.

Procedure

Check direct memory usage.

  1. On the FusionInsight Manager portal, choose O&M > Alarm > Alarms > Flume Direct Memory Usage Exceeds the Threshold > Location. Check the host name of the instance involved in this alarm.
  2. On the FusionInsight Manager portal, choose Cluster > Name of the desired cluster > Services > Flume > Instance. Click the instance for which the alarm is generated to go to the page for the instance, click the drop-down menu in the chart area and choose Customize > Agent > Flume Direct Memory Usage Statistics. Click OK.
  3. Check whether the used direct memory of Flume reaches the threshold (the default value is 80% of the maximum direct memory) specified for Flume.

    • If yes, go to 4.
    • If no, go to 6.

  4. On the FusionInsight Manager portal, choose Cluster > Name of the desired cluster > Service > Flume > Configurations. Click All Configurations, and choose Flume > System. Increase the value of -XX:MaxDirectMemorySize in GC_OPTS as required, and click Save. Click OK.

    If this alarm is generated, the direct memory size configured for the Flume server instance is insufficient for the service scenario. You are advised to change the value of -XX:MaxDirectMemorySize to twice the current direct memory usage or to another value to meet site requirements.

  5. Restart the affected services or instances 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 portal, choose O&M > Log > Download.
  2. Select Flume in the required cluster from the Service drop-down list.
  3. Click in the upper right corner, and set Start Date and End Date for log collection to 10 minutes ahead of and after the alarm generation time, respectively. Then, click Download.
  4. Contact the O&M personnel and send the collected fault logs.

Alarm Clearing

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

Related Information

None

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