Possible memory leak with Dictionary Renderer and very dynamic attributes

imbachb — Mon, 08 Jun 2026 11:03:00 GMT

A while ago I've reported following issue

Solved: Possible memory leak with Dictionary Renderer and ... - Esri Community

for which a fix was released in ArcGIS SDK for Qt v200.8.2 and v.300.0.0.

> BUG-000181142: Memory leak with DictionaryRenderer and very dynamic attributes.

However, with both of these version we still experience the same issue.

Working set of the process is steadily increasing:

Allocations do not seem to get deleted from the function `esri::cim_rule_engine::Style_parser::get_symbol_keys`

ArcGIS SDK v200.8.2

ArcGIS SDK v300.0.0

Is a cache of symbols being built? How large can we expect this cache to grow?

Please find attached a source code example. The example code does following:

Add a dictionary renderer using the app-6e stylx.
Add 200 graphics at random positions
Update attributes of all graphics on a timer

This function creates a timer which loops over all graphics and sets random attributes on each graphic, causing the leak.

namespace { const std::vector<std::string> identifications{"0", "1", "2", "3", "4", "5"}; std::uniform_int_distribution<std::size_t> identification_distribution{0, identifications.size() - 1}; const std::vector<std::string> mainIcons{ "000000", "110000", "110100", "110101", "110102", "110103", "110104", "110105", "110107", "110116", "110200"}; std::uniform_int_distribution<std::size_t> mainIcon_distribution{0, mainIcons.size() - 1}; std::uniform_int_distribution<std::size_t> azimuth_distribution{0, 360}; const std::vector<std::string> modifiers{"00", "01", "02", "03", "04", "05", "06", "07", "08", "09", "10"}; std::uniform_int_distribution<std::size_t> modifiers_distribution{0, modifiers.size() - 1}; } // namespace void CustomDictionaryRenderer::drawSymbols() { for (size_t i = 0; i < 200; i++) { auto geom = Point(8.5417, 47.3769, m_spatialReference); QVariantMap attributes; attributes["sidc"] = "1400010000110102000000"; Graphic* graphic = new Graphic(geom, attributes, this); m_graphicsOverlay->graphics()->append(graphic); } QTimer* timer = new QTimer(this); connect(timer, &QTimer::timeout, this, [this] { for (auto graphic : *m_graphicsOverlay->graphics()) { QVariantMap attributes; auto identification = identifications[identification_distribution(m_generator)]; auto mainIcon = mainIcons[mainIcon_distribution(m_generator)]; auto sidc = "140" + identification + "010000" + mainIcon + "000000"; attributes["sidc"] = QString::fromStdString(sidc); auto randomX = 8.5417 + (9.2417 - 8.5417) * static_cast<double>(rand()) / RAND_MAX; auto randomY = 47.3769 + (46.3769 - 47.3769) * static_cast<double>(rand()) / RAND_MAX; attributes["direction"] = QString::number(180.0 + (-180.0 - 180.0) * static_cast<double>(rand()) / RAND_MAX); attributes["speed"] = QString::number(10000.0 + (0.0 - 10000.0) * static_cast<double>(rand()) / RAND_MAX); attributes["staffcomment"] = QString::number(10000.0 + (0.0 - 10000.0) * static_cast<double>(rand()) / RAND_MAX); attributes["uniquedesignation"] = QString::number(10000.0 + (0.0 - 10000.0) * static_cast<double>(rand()) / RAND_MAX); attributes["additionalinformation"] = QString::number(10000.0 + (0.0 - 10000.0) * static_cast<double>(rand()) / RAND_MAX); auto point = Point(randomX, randomY, m_spatialReference); graphic->attributes()->setAttributesMap(attributes); graphic->setGeometry(point); } }); timer->start(100); }

We are using Windows 10, ArcGIS Maps SDK for Qt 200.8.2 / 300.0.0, and DirectX rendering API.

Re: Possible memory leak with Dictionary Renderer and very dynamic attributes

imbachb — Mon, 08 Jun 2026 11:05:53 GMT

I ran some tests over the weekend: It seems that memory consumption is relatively stable after a while. Could someone from ESRI confirm that memory consumption for symbols grows only to a certain level and then remains stable? For our use case this is very important as our applications tend to run for days without restart. Many thanks!

topic Re: Possible memory leak with Dictionary Renderer and very dynamic attributes in Qt Maps SDK Questions

Possible memory leak with Dictionary Renderer and very dynamic attributes

Re: Possible memory leak with Dictionary Renderer and very dynamic attributes