KVM host monitoring fails with "can't modify frozen Array: []" in state.rb on Ubuntu 24.04

Product Support Installation & Configuration
1

Hello,

My KVM host is stuck in an ERROR state after being added. After deep debugging, we found the root cause in the oned.log.

My Setup:

  • OS: Ubuntu 24.04 LTS
  • OpenNebula Version: 6.8.0.1-1

The Error:
The oned.log shows that the monitoring script state.rb is crashing with a Ruby FrozenError. Here is the exact error message from the log:
<STATE_VM>Error executing state.rb: can't modify frozen Array: [] </STATE_VM>

Full log snippet for context:

Thu Jun 12 00:28:35 2025 [Z0][HMM][E]: Unable to monitor host id: 7
Thu Jun 12 00:28:35 2025 [Z0][MDP][W]: Error parsing start message for host 7: <MONITOR_MESSAGES>…<STATE_VM>Error executing state.rb: can’t modify frozen Array: </STATE_VM>

The libvirtd.service is running correctly and passwordless SSH for oneadmin to localhost is working. This seems to be a bug in the monitoring script on Ubuntu 24.04.

Could you please advise on a patch or a fix for this issue?
Thank you.

2

Hello @DarekHub

Based on the release notes: Platform Notes.
Ubuntu 24 is not supported on OpenNebula 6.8, so we strongly suggest you to upgrade it to the lastest version to check if the problem persists.

Regards,

3

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