Required to lock TCPIP core functionality!

[RoelHermus]

The installing the latest 3.1.0 version of ESP32 by ESpressif System continuously restarts the esp32 with the error:

assert failed: tcp_alloc /IDF/components/lwip/lwip/src/core/tcp.c:1851 (required to lock the TCPIP core functionality!)

After reinstalling version 3.0.7, the problem was solved.

[me-no-dev]

will be fixed/updated to work with core 3.1.0

[xinkiknix]

Same issue on ESP32S3

[bilalakhtar]

@lbernstone Thank you for pointing this out. I reviewed the ESPAsyncWebServer repository, and it seems the issue is indeed related to the "Required to lock TCPIP core functionality!"

[bilalakhtar]

Same issue with esp32, @me-no-dev Kindly look into this issue.

[shortrangetech]

confirming I am also getting the same "Required to lock TCPIP" issue on an ESP32-WROOM-32D. Downgrading to the previous version of esp32 by espressif also solved the problem for me.

[bilalakhtar]

@sh0rtrange Thank you! I'll try that as a temporary workaround. I really appreciate your input!

[micha6554]

ESP32C6 error on "tcp.c:1851"
Thanks for help

[enotanet]

3.1.1 - no fix changes, still "required to lock the TCPIP core functionality!"

[sudo-Mystic]

3.6.0 , facing same issue

[jp-stewart]

++ Adding that I see the same on the waveshare esp32 c3 and that downgrade worked. Thank you!

[sudo-Mystic]

++ Adding that I see the same on the waveshare esp32 c3 and that downgrade worked. Thank you!

Hey can you tell me which version are you using? thank you

[jp-stewart]

++ Adding that I see the same on the waveshare esp32 c3 and that downgrade worked. Thank you!

Hey can you tell me which version are you using? thank you

Hmmm -- investigating this question has shown me that it seems I stopped updates at some point. I have version 3.1.2 of espasyncwebserver. Which means I must have encountered other errors that caused me to stop at this version (and I don't remember why anymore :/)

But confirming that the 3.1.0 to 3.0.7 downgrade of esp sdk fixed the errors.