Hard fault crash when using HTTPServer:ESP32-C3

[dhalbert]

EDIT: closed in favor of #9749

Originally posted by @c--- in #9173 (comment)

Adafruit CircuitPython 9.2.0-beta.1 on 2024-10-11; Maker Go ESP32C3 Supermini with ESP32-C3

As far as I can tell, server.poll() might be the cause.

Currently using the following code.py that still crashes:

import wifi
import socketpool
from adafruit_httpserver import Server

pool = socketpool.SocketPool(wifi.radio)
server = Server(pool, debug=False)

while True:
   try:
      server.poll() 

   except Exception as e:
      print(str(e))

[jepler]

Is this a duplicate of #9460 ?

[dhalbert]

Is this a duplicate of #9460 ?

It might be but it's a much simpler reproducer, which is great. We should try to fix this and then see ask @mMerlin if #9460 is fixed.

I consider this a showstopper for 9.2.0.

[dhalbert]

@c--- The test program above generates continuous ServerStopped exceptions. This is more easily seen if you do

while True:
   try:
      server.poll() 

   except Exception as e:
      print(type(e))

to print the type rather than the string form of the exception.

You do need a server.start(). However, in your original test program, you had:

server.start("0.0.0.0", 80)

If I add that, I do indeed get a hard crash. But instead of using 0.0.0., use this:

server.start(str(wifi.radio.ipv4_address))

In other words, for now, you need to specify the IP address specifically; "0.0.0.0" doesn't work. That's a bug we should fix.
You can also use server.serve_forever(...), which does the .start() and the .poll() loop for you.

[mMerlin]

What are the implications of this discovery for #9460 which was thought to be the same (or at least related) bug. That does not use the 0.0.0.0 address.

[dhalbert]

What are the implications of this discovery for #9460 which was thought to be the same (or at least related) bug. That does not use the 0.0.0.0 address.

I don't think these are the same after all, after looking into it further.

[dhalbert]

Reproduced, but only on ESP32-C3. Test program:

import wifi
import socketpool
from adafruit_httpserver import Server
import time

time.sleep(5)
print("IP addr", wifi.radio.ipv4_address)

pool = socketpool.SocketPool(wifi.radio)
server = Server(pool, debug=False)

# port 80 will get EADDRINUSE due to web workflow
# Either IP adddress will cause a crash eventually.
server.start("0.0.0.0", 8000)
#server.start(str(wifi.radio.ipv4_address), 8000)

while True:
   try:
      server.poll()
   except Exception as e:
      print(type(e))

Either servert.start() can cause a crash: the wildcard IP address or the actual IP address don't matter. It takes around 1-5 minutes to restart in safe mode, though I have seen it run longer. No interaction with the HTTP server is needed. I simply restart code.py and wait.

I have reproduced this only on a QT Py ESP32-C3. I cannot reproduce on a QT ESP32-S3, with no PSRAM. I was hoping it might have been a storage leak.

[dhalbert]

I'm closing this in favor of #9749. There are several red herrings above, which are irrelevant to the actual issue.