Analytics: removed unnecessary error logging in Smoothing plugin

analytics/operators/smoothing/SmoothingOperator.cpp

@@ -48,9 +48,10 @@ void SmoothingOperator::compute(U_Ptr unit) {
     _buffer.clear();
     SmoothingSBPtr sIn=unit->getInputs()[0], sOut=unit->getOutputs()[0];
     uint64_t startTs = sOut->getTimestamp() ? getTimestamp()-sOut->getTimestamp() : 0;
-    
+
+    // Throwing an error does not make sense here - the query will often fail depending on insert batching
     if(!_queryEngine.querySensor(sIn->getName(), startTs, 0, _buffer, true))
-        throw std::runtime_error("Operator " + _name + ": cannot read from sensor " + sIn->getName() + "!");
+        return;
     
     for(const auto& v : _buffer) {
         if (v.timestamp > sOut->getTimestamp()) {