Description
The system checks whether the success rate of calling APIs for writing OBS data 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.
Attribute
Alarm ID |
Alarm Severity |
Auto Clear |
|---|---|---|
45178 |
Minor |
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 for triggering the alarm. |
Impact on the System
If the success rate of calling the OBS APIs for writing data is lower 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.
Procedure
Check the heap memory usage.
- On the MRS Manager homepage, choose O&M > Alarm > Alarms > Success Rate for Calling the OBS Data Write 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 data write operation interface calls from OBS data write operation, and click OK. Check whether the average time of OBS metadata API calls exceeds the threshold.
- Choose Cluster > Name of the desired cluster > O&M > Alarm > Thresholds > meta > Success Rate for Calling the OBS Data Write 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 MRS 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.
Alarm Clearing
This alarm is automatically cleared after the fault is rectified.
Related Information
None