geometryEngine.union creates slivers

[JamesCrandall]

Any obvious reason why a dissolve of selected polygons (by way of geometryEngine.union()) is creating slivers in between the coincident input polygons?

dissolveSelectedPolygons: function () {
     var graphicsToDissolve = this.parcelLayer.getSelectedFeatures(), geometriesToDissolve = [];

geometriesToDissolve.push(this.clientSideScratchLayer.graphics[0].geometry);

var newGeometry = geometryEngine.union(geometriesToDissolve);

this.clientSideScratchLayer.clear();
this.clientSideScratchLayer.add(this.createGraphicFromGeometry(newGeometry));
}

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[JamesCrandall · Accepted solution]

Robert has answered this in another post HERE.

yourFeatureLayer.setMaxAllowableOffset(0);
yourFeatureLayer.setAutoGeneralize(false);‍‍