Possible memory leak with Dictionary Renderer and very dynamic attributes
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.
Addendum:
I let it run for a while, memory usage in the task manager increased from 100MB to 1.4GB. Now suddenly the map seems frozen. The symbols do not update anymore. I can not zoom or pan the map anymore. However it resumed when I switched the window into fullscreen mode and back ...
