Hello Michael,

Thanks for your prompt reply.

I just open this new issue: https://github.com/zephyrproject-rtos/zephyr/issues/21328

However, I am not able to assign it to you.

Really thanks for your help on this case

Rgds,

Guillaume

Hello Guillaume,

Hello Zephyr Community,

 

I found where something is wrong.

Indeed in net_context_get function, I saw that I reached CONFIG_NET_MAX_CONTEXTS (equal to 10 in my prj.conf).
For your information, I use UBLOX sara r4 driver (on zephyr 1.14.1 as I mentionned in my previous mail) and I wonder if contexts are well managed in this revision, especially when socket is closed ?

There could certainly be a bug in the socket offloading layer for UBLOX Sara R4 (I'm the maintainer for the current modem layer in Zephyr):
https://github.com/zephyrproject-rtos/zephyr/blob/master/drivers/modem/ublox-sara-r4.c

Can you open an issue here:

https://github.com/zephyrproject-rtos/zephyr/issues

Please include as much information as you can (from this email series):
- Zephyr version: 1.14.1

- Sample used: samples/net/mqtt_publisher

- Firmware version on SARA R4 modem

- etc

And add me as "Assignee"

Thanks!

- Mike

 

Thanks in advance for your help

 

Best Regards,

 

Guillaume

---

De : devel@... <devel@...> de la part de Guillaume Paquet via Lists.Zephyrproject.Org <guillaume.paquet=stimio.fr@...>
Envoyé : mercredi 11 décembre 2019 16:24
À : Guillaume Paquet <guillaume.paquet@...>; devel@... <devel@...>
Cc : devel@... <devel@...>
Objet : Re: [Zephyr-devel] [TCP/MQTT] Connection issue

 

And just to add some precision, I work on zephyr 1.14.1.

 

Rgds

 

Guillaume

 

De : devel@... <devel@...> De la part de Guillaume Paquet via Lists.Zephyrproject.Org
Envoyé : mercredi 11 décembre 2019 13:50
À : devel@...
Cc : devel@...
Objet : [Zephyr-devel] [TCP/MQTT] Connection issue

 

Hello Zephyr community,

 

I contact you because I have an issue when I run mqtt_publisher example

https://docs.zephyrproject.org/1.13.0/samples/net/mqtt_publisher/README.html

 

I have the following issue when I have multiple mqtt connection/disconnection (through tcp transport_connect function)

[try_to_connect:233] mqtt_connect: -2 <ERROR>

 

I have this issue after 10 connection/disconnection. The eleventh one is always failing.

As I said you I saw that this is failing when I try to run mqtt_transport_connect(client); in client_connect.

 

My configuration is the following one :

·        MQTT (not secured)

·        TCP/IPv4

·        Broker on external server (not any issue on this one)

 

If you have any idea to help me

 

Thanks in advance

 

Best Regards

 

Guillaume

 

   www.stimio.fr

Guillaume  PAQUET – IoT Engineer

guillaume.paquet@...  -  02 40 18 50 91

1 Avenue Professeur Jean Rouxel – ZAC Fleuriaye

44470 CARQUEFOU – FRANCE                

 

-- 

Michael Scott

Embedded Software Engineer at Foundries.io

"microPlatforms™ for Connected Products"

E: mike@...

W: https://www.foundries.io

Hi,

We actually encountered the same issue, not with this driver but with a different modem based upon this driver, from what I remember (it has been a long time since I last investigated) it seemed as if each reconnect incremented the memory address of the buffers so something wasn’t getting cleaned up, I didn’t look into if this was the networking stack or the driver however. This was on Zephyr 1.14, it was also using MQTT but not that specific sample.

Thanks,

Jamie

And just to add some precision, I work on zephyr 1.14.1.

Rgds

Guillaume

Hello Zephyr community,

I contact you because I have an issue when I run mqtt_publisher example

https://docs.zephyrproject.org/1.13.0/samples/net/mqtt_publisher/README.html

I have the following issue when I have multiple mqtt connection/disconnection (through tcp transport_connect function)

[try_to_connect:233] mqtt_connect: -2 <ERROR>

I have this issue after 10 connection/disconnection. The eleventh one is always failing.

As I said you I saw that this is failing when I try to run mqtt_transport_connect(client); in client_connect.

My configuration is the following one :

• MQTT (not secured)
• TCP/IPv4
• Broker on external server (not any issue on this one)

If you have any idea to help me

Thanks in advance

Best Regards

Guillaume

   www.stimio.fr

Guillaume  PAQUET – IoT Engineer

guillaume.paquet@...  -  02 40 18 50 91

1 Avenue Professeur Jean Rouxel – ZAC Fleuriaye

44470 CARQUEFOU – FRANCE                

Hello Zephyr community,

I contact you because I have an issue when I run mqtt_publisher example

https://docs.zephyrproject.org/1.13.0/samples/net/mqtt_publisher/README.html

I have the following issue when I have multiple mqtt connection/disconnection (through tcp transport_connect function)

[try_to_connect:233] mqtt_connect: -2 <ERROR>

I have this issue after 10 connection/disconnection. The eleventh one is always failing.

As I said you I saw that this is failing when I try to run mqtt_transport_connect(client); in client_connect.

My configuration is the following one :

• MQTT (not secured)
• TCP/IPv4
• Broker on external server (not any issue on this one)

If you have any idea to help me

Thanks in advance

Best Regards

Guillaume

   www.stimio.fr

Guillaume  PAQUET – IoT Engineer

guillaume.paquet@...  -  02 40 18 50 91

1 Avenue Professeur Jean Rouxel – ZAC Fleuriaye

44470 CARQUEFOU – FRANCE