# Intermittent disconnection between OpenVidu Server and Media Node (Kurento)
**URL:** https://openvidu.discourse.group/t/intermittent-disconnection-between-openvidu-server-and-media-node-kurento/5417
**Category:** Issues with deployment
**Created:** [August 18, 2025, 2:44pm UTC](https://openvidu.discourse.group/t/intermittent-disconnection-between-openvidu-server-and-media-node-kurento/5417 "2025-08-18T14:44:23Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@william07](https://openvidu.discourse.group/u/william07)
#### Post date: [August 18, 2025, 2:44pm UTC](https://openvidu.discourse.group/t/intermittent-disconnection-between-openvidu-server-and-media-node-kurento/5417/1 "2025-08-18T14:44:23Z")
Hello,
We recently faced an intermittent issue in our deployment and I’d like to better understand the potential root causes.
**Setup:**
- 1 VM running OpenVidu Server
- 2 VMs running Media Node Controller
- Openvidu v2 Pro (2.31.0)
- Everything had been working normally before the incident
**Problem observed:**
- Suddenly, one Media Node started rejecting every session created on it, while the other node was still fine.
- OpenVidu Server wasn’t able to connect to that Media Node, which eventually crashed.
- The next day, without any intervention or configuration change, the failing node started working again.
**Troubleshooting already done:**
- Removed the failing node from the Media Node list and created a new VM for workload continuity.
- Left the problematic VM untouched to investigate root cause.
- Checked ELK logs → nothing alarming.
- Checked CPU usage → high during the disconnection, but seems more like a _consequence_ (loop between OpenVidu Server and the unreachable node) rather than the root cause.
- Verified network connectivity → look normal.
- Verified disk usage → look good (Media Node auto-cleaning log files).
**My questions:**
- What could cause a disconnection between OpenVidu Server and a Media Node, that later resolves without any action?
- What could be potential root causes for a Media Node to suddenly start rejecting sessions and then recover on its own?
- Are there additional logs or metrics (besides ELK, CPU, disk, network) that you recommend monitoring to detect or explain these transient failures?
Thanks a lot in advance for your help and insights! If you need any details, let me know!
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### Author:  [@cruizba](https://openvidu.discourse.group/u/cruizba)
#### Post date: [August 21, 2025, 1:56pm UTC](https://openvidu.discourse.group/t/intermittent-disconnection-between-openvidu-server-and-media-node-kurento/5417/2 "2025-08-21T13:56:39Z")
> - The next day, without any intervention or configuration change, the failing node started working again.
> - What could cause a disconnection between OpenVidu Server and a Media Node, that later resolves without any action?
> - What could be potential root causes for a Media Node to suddenly start rejecting sessions and then recover on its own?
The connection in the next day makes me thing of a temporary error in the network when the disconnection happened.
> Are there additional logs or metrics (besides ELK, CPU, disk, network) that you recommend monitoring to detect or explain these transient failures?
Yes, logs from `openvidu-server` container at the master node and logs from the `kms` container in the Media Node.
What logs do you have from that specific moment? If this is the first time it happened to you, it is mostly a temporary network issue.