ALM-26054 Heap Memory Usage of Storm Nimbus Exceeds the Threshold (For MRS 2.x or Earlier)
Description
The system checks the heap memory usage of Storm Nimbus every 30 seconds and compares it with the threshold. This alarm is generated if the heap memory usage exceeds the threshold (80% by default).
To modify the threshold, users can choose
on MRS Manager.This alarm is cleared if the heap memory usage is lower than or equal to the threshold.
Attribute
Alarm ID |
Alarm Severity |
Auto Clear |
---|---|---|
26054 |
Major |
Yes |
Parameters
Parameter |
Description |
---|---|
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 |
Generates an alarm when the actual indicator value exceeds the specified threshold. |
Impact on the System
Frequent memory garbage collection or memory overflow may occur, affecting submission of Storm services.
Possible Causes
The heap memory usage is high or the heap memory is improperly allocated.
Procedure
- Check the heap memory usage.
- Go to the cluster details page and choose Alarms.
- Choose . Query the HostName of the alarmed instance.
- Choose .
- Check whether the heap memory usage of Nimbus has reached the threshold (80%).
- Adjust the heap memory.
Choose , and set Type to All. Choose Nimbus > System. Increase the value of -Xmx in NIMBUS_GC_OPTS. Click Save Configuration. Select Restart the affected services or instances and click OK.
- Check whether the alarm is cleared.
- If yes, no further action is required.
- If no, go to 2.
- Collect fault information.
- On MRS Manager, choose .
- Contact the O&M engineers and send the collected logs.
Related Information
N/A
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