ALM-45176 Success Rate of Calling OBS Metadata APIs Is Lower than the Threshold

Alarm Description

The system checks whether the success rate of calling OBS metadata APIs is lower than the threshold every 30 seconds. This alarm is generated when the success rate is lower than the threshold.

This alarm is automatically cleared when the success rate of calling APIs for writing OBS data is greater than the threshold.

Alarm Attributes

Alarm ID	Alarm Severity	Auto Cleared
45176	Minor	Yes

Alarm Parameters

Parameter	Description
Source	Specifies the cluster 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.
Trigger Condition	Specifies the threshold for triggering the alarm.

Impact on the System

If the success rate of calling the OBS metadata APIs is less than the threshold, the upper-layer big data computing services may be affected. To be more specific, some computing tasks may fail to be executed.

Possible Causes

An execution exception or severe timeout occurs on the OBS server.

Handling Procedure

Check the heap memory usage.

On the FusionInsight Manager homepage, choose O&M > Alarm > Alarms > Success Rate for Calling the OBS Metadata API Is Lower Than the Threshold, view the role name in Location, and check the instance IP address.
Choose Cluster > Name of the desired cluster > Services > meta > Instance > meta (IP address of the instance for which the alarm is generated). Click the drop-down list in the upper right corner of the chart area and choose Customize. In the dialog box that is displayed, select Success percent of OBS interface calls from OBS Meta data Operations, and click OK. Check whether the average time of OBS metadata API calls exceeds the threshold.
- If yes, go to 3.
- If no, go to 5.
Figure 1 Successful rate for calling the OBS API
Choose Cluster > Name of the desired cluster > O&M > Alarm > Thresholds > meta > Success Rate for Calling the OBS Metadata API. Increase the threshold or smoothing times as required.
Check whether the alarm is cleared.
- If yes, no further action is required.
- If no, go to 5.

Collect the fault information.

On FusionInsight Manager, choose O&M. In the navigation pane on the left, choose Log > Download.
In the Services area, select NodeAgent, NodeMetricAgent, OmmServer, and OmmAgent under OMS.
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.
Contact O&M personnel and provide the collected logs.