Call for help - Client stalls after a number of messages are received

[FilhoRicardo]

hi all, sorry if here is not the correct place to ask this, if not please can you direct me to the correct place? basically I created a script in python that connects to a mosquitto broker that is connected to Niagara, and I have a list of topics I want to subscribe to. every time I get a new message I look at the topic and decide if I want to save a copy of the message or not. Right now I am using a list where I append a tuple with the topic and message body, whenever the length of the list is 300 I save all the messages on my hard disk. however the code just stalls after it sees 1400ish messages and no errors are raised. do you have any debugging suggestions?

[kalmastenitin]

can you share more details about this? any error/message log will be helpful

[FilhoRicardo]

Hi, unfortunately one of the major issues for me is the lack of error messages. I am dealing with a lot of sensitive data I can not share, however I am sharing the code I am using to download messages from the broker. In summary, I have a script that connects to a mosquitto broker, and this broker is receiving messages from Niagara. My task is to check if messages are compliant with a standard I created. The compliance check is Ok, but the downloading of the messages is weird. the code just stalls after a while, i did change the keep_alive on my script and got the code stalling when there was 192 secs missing (ka = 15s), 168secs(ka = 30s) and 120secs(ka =60s)

[image: image.png]

that is what I get, just this message. one more detail, I am attaching the code I wrote, if within the while loop I print a message, this message is printed over and over again until the timeout is reached.

thanks :) ricardo

On Tue, 28 Mar 2023 at 14:15, kalmastenitin @.***> wrote:

can you share more details about this? any error/message log will be helpful

— Reply to this email directly, view it on GitHub https://github.com/eclipse/paho.mqtt.python/issues/711#issuecomment-1486868916, or unsubscribe https://github.com/notifications/unsubscribe-auth/A6VZ7JQTRHZ26E5Q725IKOLW6LP67ANCNFSM6AAAAAAWE4ZLYU . You are receiving this because you authored the thread.Message ID: @.***>

[FilhoRicardo]

I believe I found the solution, would you like to discus it? thanks

On Tue, 28 Mar 2023 at 17:56, Ricardo Filho @.***> wrote:

Hi, unfortunately one of the major issues for me is the lack of error messages. I am dealing with a lot of sensitive data I can not share, however I am sharing the code I am using to download messages from the broker. In summary, I have a script that connects to a mosquitto broker, and this broker is receiving messages from Niagara. My task is to check if messages are compliant with a standard I created. The compliance check is Ok, but the downloading of the messages is weird. the code just stalls after a while, i did change the keep_alive on my script and got the code stalling when there was 192 secs missing (ka = 15s), 168secs(ka = 30s) and 120secs(ka =60s)

[image: image.png]

that is what I get, just this message. one more detail, I am attaching the code I wrote, if within the while loop I print a message, this message is printed over and over again until the timeout is reached.

thanks :) ricardo

On Tue, 28 Mar 2023 at 14:15, kalmastenitin @.***> wrote:

can you share more details about this? any error/message log will be helpful

— Reply to this email directly, view it on GitHub https://github.com/eclipse/paho.mqtt.python/issues/711#issuecomment-1486868916, or unsubscribe https://github.com/notifications/unsubscribe-auth/A6VZ7JQTRHZ26E5Q725IKOLW6LP67ANCNFSM6AAAAAAWE4ZLYU . You are receiving this because you authored the thread.Message ID: @.***>

[kalmastenitin]

Yes please

[MattBrittan]

Closing this issue due to inactivity (and it looks like a solution was found). With issues like this logs are very helpful.