Getting "msg"="failed to record" "error"="observable instrument not registered for callback" error

[karthi8185]

Hi,
I am getting ""msg"="failed to record" "error"="observable instrument not registered for callback" while using the below code.

Kindly let me know, for what kind of situation, this error may arise.

Same Code:

for _, rowMetric := range data.Value {

            rowName := rowMetric.RowName                                    
            for _, value := range rowMetric.Values {                        

                    fullName = fmt.Sprintf(tableName + "/" + rowName + "/" + metricName)
                    name, _ = meter.Int64ObservableGauge(                   
                            fullName,                                       
                    )                                                       
                    fullName1 = append(fullName1, fullName)                 
                    name1 = append(name1, name)                             
                    setMetricValue(fullName, int64(value.Value))            
                    count += 1                                              
            }                                  

          var out []metric.Observable                                     
            for _, inst := range name1 {                                    
                    if in, ok := inst.(wrappedc); ok {                      
                            out = append(out, in.unwrap())                  
                    } else {                                                
                            out = append(out, inst)                         
                    }                                                       
            }                                                               
            go func() {                                                     
            _, err = meter.RegisterCallback(                                
                    func(ctx context.Context, o metric.Observer) error {    
                            for travel := 0; travel < count; travel++ {     
                                    o.ObserveInt64(name1[travel], int64(getMetricValue(fullName1[travel])))
                            }                                               
                            return nil                                      
                    },                                                      
                    out...,                                                 
            )                                                               
            if err != nil {                                                 
                    handleErr(err, fmt.Sprintf("Unable to Register  the callback: %s", tableName))
            }                                                               
                                                              
            }()                                                             

[pellared]

1. The snippet is not a working example
2. Why are you calling RegisterCallback in a separate goroutine?