Code run _thread.start_new_thread, that includes AWS MQTT causes guru meditation

[timh]

Hi

I have FiPy/GPY running with LTE-CAT-M1 or Wifi connections for a while.

I wanted to look at including pybytes.

However I find that if I run my code inside a new thread. _thread.start_new_thread
LTE and WLAN can be setup in this thread, however as soon as I try to create an MQTT connection using the underlying AWS library I get a guru meditation error.

Connected <WLAN>
WDT enabled
Connecting to mqtt
Guru Meditation Error: Core  0 panic'ed (LoadProhibited)
. Exception was unhandled.
Register dump:
PC      : 0x4008aa9d  PS      : 0x00060033  A0      : 0x4008c117  A1      : 0x3ffd54f0
A2      : 0x3ffc513c  A3      : 0x00050023  A4      : 0x3ffc4fb4  A5      : 0x00000000
A6      : 0x00000000  A7      : 0x00000000  A8      : 0x00000002  A9      : 0x3ffc4fac
A10     : 0x00000000  A11     : 0x00000001  A12     : 0x3ffb7cdc  A13     : 0x00000000
A14     : 0x00000005  A15     : 0x7fffffff  SAR     : 0x0000001f  EXCCAUSE: 0x0000001c
EXCVADDR: 0x0000000c  LBEG    : 0x400e67e4  LEND    : 0x400e6820  LCOUNT  : 0x00000000

Backtrace: 0x4008aa9d:0x3ffd54f0 0x4008c114:0x3ffd5520 0x4008c0ca:0x3ffc5ca0

The AWS mqtt library creates it's own threads to handle connection and inbound messages.

Not sure if this is a restriction of the platform or my approach.

Thanks

Tim

[james]

I have the same problem using this library or simple mqtt in another thread with version (1.18/1.19 Pybytes)

rst:0x7 (TG0WDT_SYS_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff8028,len:8
load:0x3fff8030,len:1984
load:0x4009fa00,len:0
load:0x4009fa00,len:19112
entry 0x400a05e4
Initializing filesystem as FatFS!
Guru Meditation Error: Core  0 panic'ed (Cache disabled but cached memory region accessed)
Core 0 register dump:
PC      : 0x401f27e8  PS      : 0x00060c34  A0      : 0x8005582c  A1      : 0x3ffc0970
A2      : 0x00000000  A3      : 0x00000001  A4      : 0x800995d1  A5      : 0x3ffea5f0
A6      : 0x0000b030  A7      : 0x3ffea6a4  A8      : 0x8008cc86  A9      : 0x01000000
A10     : 0x07040000  A11     : 0x00000000  A12     : 0x00000013  A13     : 0x00000000
A14     : 0x3ffae270  A15     : 0x00000000  SAR     : 0x0000000e  EXCCAUSE: 0x00000007
EXCVADDR: 0x00000000  LBEG    : 0x40099276  LEND    : 0x40099285  LCOUNT  : 0x00000000
Core 0 was running in ISR context:
EPC1    : 0x40092e5f  EPC2    : 0x00000000  EPC3    : 0x00000000  EPC4    : 0x401f27e8

with the old version (1.17.3.b1 or 1.18.0) the error was different but there was.

Connecting to MQTT broker....
1
2
3
4
***ERROR*** A stack overflow in task MPThread has been detected.
abort() was called at PC 0x4008e66c on core 1

the mqtt library is:
https://github.com/yutter/micropython-mqtt

Furthermore
after updating to the 1.18.0 or 1.19.4.b4 to try to understand if the problem related to the threads and mqtt had been solved I had another problem, I can not load some files ...
example of what happens that did not happen before; I added the size of the files in which I have problems

Reading file status
Failed to read project status, uploading all files
Creating dir lib
Creating dir www
Creating dir www/bootstrap
Creating dir www/bootstrap/css
Creating dir www/bootstrap/fonts
Creating dir www/bootstrap/js
Creating dir www/js
[1/18] Writing file SI7006A20.py
[2/18] Writing file boot.py
[3/18] Writing file hal.py
[4/18] Writing file lib/mqttserver.pub.pem
[5/18] Writing file main.py
[6/18] Writing file mqtt.py
[7/18] Writing file umqtt.py
[8/18] Writing file www/bootstrap/css/bootstrap.min.css  "filesize (121.3kb)"
Failed to write file, trying again...
Failed to write file, trying again...
Filecheck failed
[9/18] Writing file www/bootstrap/js/bootstrap.min.js "filesize (36.9kb)"
Failed to write file, trying again...
[10/18] Writing file www/index.html
[11/18] Writing file www/js/angular.min.js "filesize (99.0kb)"
Failed to write file, trying again...
Failed to write file, trying again...
Filecheck failed
[12/18] Writing file www/js/app.js
[13/18] Writing file www/js/jquery-1.11.1.js "filesize (282.8kb)"
Failed to write file, trying again...
Failed to write file, trying again...
Filecheck failed
[14/18] Writing file xApp.py
Failed to write file, trying again...
[15/18] Writing file xConfigureFile.py
[16/18] Writing file xHTTPConfigure.py
[17/18] Writing file xWebServer.py
[18/18] Writing file xWebSocket.py

why?

waiting for a quick reply
best regards

Giacomo