[Bug] High SSL heap usage can cause reset

BlueAndi / Pixelix

Full RGB LED matrix, based on an ESP32 and WS2812B LEDs.

MIT License

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[Bug] High SSL heap usage can cause reset #153

Closed BlueAndi closed 3 weeks ago

BlueAndi commented 9 months ago

A outgoing https:// connection needs about 47 kByte of heap memory. If several plugins requests informations at the same time, it will cause a reset by AsyncTcpSock. AsyncTcpSock uses std::dequeue which allocates memory and causes an system abort.

Idea: Serialize all AsyncHttpClient requests.

BlueAndi commented 9 months ago

https://github.com/Mbed-TLS/mbedtls/issues/1203
https://github.com/espressif/arduino-esp32/issues/6286
https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/protocols/mbedtls.html#performance-and-memory-tweaks
https://docs.espressif.com/projects/esp-idf/en/v4.4.6/esp32/api-reference/kconfig.html#config-mbedtls-ssl-max-content-len