TypeError sometimes during scrape

[ericstromsodt]

Describe the bug
TypeError: Cannot read properties of undefined (reading 'length') at eval (eval at evaluate (:226:30), :68:118) at Array.filter () at isItemInStock (eval at evaluate (:226:30), :68:83) at eval (eval at evaluate (:226:30), :118:8) at UtilityScript.evaluate (:233:19) at UtilityScript. (:1:44)

I get that error on my scrapes sometimes. It appears to recover on the next round.

Version
Exact version in the top right area: 0....
v0.45.9

To Reproduce
I am just running a regular scrape (multiple running though), 30s intervals.

! ALWAYS INCLUDE AN EXAMPLE URL WHERE IT IS POSSIBLE TO RE-CREATE THE ISSUE - USE THE 'SHARE WATCH' FEATURE AND PASTE IN THE SHARE-LINK!
Could not share, something went wrong while communicating with the share server - HTTPSConnectionPool(host='changedetection.io', port=443): Max retries exceeded with url: /share/share (Caused by NewConnectionError('<urllib3.connection.HTTPSConnection object at 0x7f9ba842d4d0>: Failed to establish a new connection: [Errno 111] Connection refused'))

Desktop (please complete the following information):
Server running the docker containers:

• OS: [e.g. iOS] Ubuntu 22.04.3 LTS
• Browser [e.g. chrome, safari] Chrome
• Version [e.g. 22] 120.0.6099.129 64-bit

Smartphone (please complete the following information):
N/A

Additional context
N/A

[dgtlmoon]

any chance we can still get a list of URLs you're watching?

btw: paste in your docker-compose.yml too

[ericstromsodt]

Yes, here's a couple URLs:
https://www.walmart.com/ip/LEGO-Harry-Potter-Hogwarts-Castle-Grounds-76419-Building-Set-Gift-Idea-Adults-Collectible-Playset-Recreate-Iconic-Scenes-Wizarding-World/2627335972?athbdg=L1103

https://www.walmart.com/ip/LEGO-Harry-Potter-Hogwarts-Astronomy-Tower-75969-Castle-Toy-Playset-8-Character-Minifigures-including-Draco-Malfoy-Wizarding-World-Birthday-Gifts-Kid/525862109?athbdg=L1100

https://www.walmart.com/ip/LEGO-Star-Wars-Executor-Super-Star-Destroyer-75356-Star-Wars-Gift-for-Star-Wars-Fans/1554393413?athbdg=L1102&from=/search

I don't think I have a docker compose. I just run this command to start it:

[dgtlmoon]

Ok first thing, change that --name changedetection.io to --name changedet or something, that way the 'share' will work

[dgtlmoon]

Then see if you can 'share' a link here... you may have some strange filters or similar

[ericstromsodt]

Ok! Here it is:
https://changedetection.io/share/HAHVzwY4KAAa

[dchakro]

Commenting as I ended up here from a google search. I found myself running into similar issue, and narrowed it down to happening after reboots. I believe my DNS server still isn't up by the time the docker daemon spins up all the containers which might be causing this error and a related error (but for Playwright watches with Exception: net::ERR_NAME_NOT_RESOLVED) to happen. Restarting the container after the DNS resolver is working mitigates these resolution issues.