Adding debug logs.

analytics/operators/persystsql/PerSystSqlOperator.cpp

@@ -78,7 +78,7 @@ void PerSystSqlOperator::compute(U_Ptr unit, qeJobData& jobData) {
     compute_internal(unit, _buffer);
 }
 
-void PerSystSqlOperator::compute_internal(U_Ptr unit, vector<reading_t>& buffer) {
+void PerSystSqlOperator::compute_internal(U_Ptr& unit, vector<reading_t>& buffer) {
 	_quantileSensors.clear();
     reading_t reading;
     AggregatorSensorBase::aggregationOps_t op;

analytics/operators/persystsql/PerSystSqlOperator.h

@@ -93,7 +93,7 @@ private:
 
 protected:
 	virtual void compute(U_Ptr unit) override;
-	void compute_internal(U_Ptr unit, vector<reading_t>& buffer);
+	void compute_internal(U_Ptr& unit, vector<reading_t>& buffer);
 	double computeSeverityAverage(vector<double> & buffer);
 };
 

analytics/operators/smucngperf/SMUCNGPerfOperator.cpp

@@ -128,7 +128,10 @@ void SMUCNGPerfOperator::compute(U_Ptr unit) {
 }
 
 void SMUCNGPerfOperator::query(const std::string & sensor_name, const uint64_t timestamp, vector<reading_t> &buffer){
-	_queryEngine.querySensor(sensor_name, timestamp, timestamp, buffer, false); //use absolute timestamp and always false
+	auto initSize = buffer.size();
+	if(_queryEngine.querySensor(sensor_name, timestamp, timestamp, buffer, false) || buffer.size() <= initSize) {
+		LOG(debug) << "SMUCNGPerf Operator " << _name << " cannot read from sensor " << sensor_name  << "!";
+	}
 }
 
 void SMUCNGPerfOperator::resetBuffers(){