Make expression functions that use internal requests more stable

Author: m-kuhn

src/core/expression/qgsexpressionfunction.cpp

@@ -3527,6 +3527,8 @@ static QVariant fcnGetFeatureById( const QVariantList &values, const QgsExpressi
 
     QgsFeatureRequest req;
     req.setFilterFid( fid );
+    req.setConnectionTimeout( 10000 );
+    req.setFreeConnectionsRequirement( 1 );
     QgsFeatureIterator fIt = vl->getFeatures( req );
 
     QgsFeature fet;
@@ -3567,6 +3569,8 @@ static QVariant fcnGetFeature( const QVariantList &values, const QgsExpressionCo
   req.setFilterExpression( QStringLiteral( "%1=%2" ).arg( QgsExpression::quotedColumnRef( attribute ),
                            QgsExpression::quotedString( attVal.toString() ) ) );
   req.setLimit( 1 );
+  req.setConnectionTimeout( 10000 );
+  req.setFreeConnectionsRequirement( 1 );
   if ( !parent->needsGeometry() )
   {
     req.setFlags( QgsFeatureRequest::NoGeometry );