SNMP device tracker broken in 2024.3.1

[lextm]

The problem

Due to an upstream package bug (pysnmp-lextudio 6.0.9), if device tracker uses SNMP v2c to query the devices, an endless loop occurs.

What version of Home Assistant Core has the issue?

2024.3.1

What was the last working version of Home Assistant Core?

2024.2.4

What type of installation are you running?

Home Assistant OS

Integration causing the issue

No response

Link to integration documentation on our website

No response

Diagnostics information

We aim to ship pysnmp-lextudio 6.0.11 as early as possible with the fix.

Related to #110100 and others.

Example YAML snippet

No response

Anything in the logs that might be useful for us?

No response

Additional information

No response

[lextm]

pysnmp-lextudio 6.0.11 was just shipped. Will send a pull request to update it in this repo.

[erikmouw]

Still does not work with the device_tracker component:

2024-03-14 23:29:48.700 WARNING (MainThread) [homeassistant.components.device_tracker] Updating device list from legacy took longer than the scheduled scan interval 0:00:13

Increasing the scan interval to 29 seconds does not fix the timeout.

Reverting back to 5.0.34 and everything works flawless again.

[mmiller7]

Still does not work with the device_tracker component:

2024-03-14 23:29:48.700 WARNING (MainThread) [homeassistant.components.device_tracker] Updating device list from legacy took longer than the scheduled scan interval 0:00:13

Increasing the scan interval to 29 seconds does not fix the timeout.

Reverting back to 5.0.34 and everything works flawless again.

Same experience for my install, had to roll back to the last Feb update to have my working SNMP device trackers again.

[morph027]

Jip, can confirm that 6.0.11 still does not work for me while 5.0.34 does.

[lextm]

pysnmp-lextudio 6.0.11 does fix the SNMP v2c WALK bug as the description shows.

We are able to detect another issue, that device_tracker is able to send the first round of SNMP packets out, but hangs after. The cause might be related to the fact that now pysnmp-lextudio is fully on asyncio, but not sure what mechanism device_tracker uses for scheduling.

Once our investigation reaches something, we will create a new issue to track the progress.

[lextm]

Created #113605 to track the remaining issue.