Return
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Title
Unable to evaluate the following derivation calculation: DerivationCalculation: VMWVirtualMachineHostCPUs, percentLimit -
Description
Foglight Management Server (FMS) logs are being filled with the following error message:
WARN [TimeDriven_Worker-7] com.quest.nitro.service.derivation.DerivationCalculation - Unable to evaluate the following derivation calculation: DerivationCalculation: VMWVirtualMachineHostCPUs, percentLimit, ID: 06984861-a777-4353-8ecb-f6483001b7d3com.quest.nitro.service.sl.interfaces.scripting.ScriptingException: com.quest.nitro.service.sl.interfaces.scripting.ScriptAbortException: java.lang.NullPointerException: Cannot invoke method getValue() on null object----script start------percentLimit = 0.0;totalHz = #totalHz#;limit = server.get("DataService").retrieveLatestValue(scope, "limit").getValue().getMax();if (limit && limit > -1 && totalHz) {percentLimit = limit / totalHz * 100}return percentLimit;---- script end ------ -
Resolution
WORKAROUND:
1. Go to the dashboard Dashboards | Administration | Data | Derived Metrics
2. Search a derived metric which name is "percentLimit", and click edit
3. Click Expression to change the expression code line as follows:
From:
limit = server.get("DataService").retrieveLatestValue(scope, "limit").getValue().getMax();
To:
limit = server.get("DataService").retrieveLatestValue(scope, "limit")?.getValue().getMax();
4. Validate then save the change
STATUS:
Waiting for fix in a future release of Foglight
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Defect ID
VM-6404