Hi all, I'm seeing `unknown` state in `oakctl app list` and would appreciate some guidance on how to track down the root cause. **My questions:** 1. **What are the common causes?** 2. **What are the recommended troubleshooting steps?** Are there specific commands or tools the community uses to identify ? 3. **What are typical fixes or preventive measures?** Thanks in advance for any pointers! --- [upl-image-preview uuid=f30c4a7b-8a5e-48aa-b495-060c9aeaf003 url=https://discuss.luxonis.com/assets/files/2026-05-09/1778297949-227688-snipaste-2026-05-09-11-38-43.png alt={TEXT?}] --- - Luxonis OS: 1.30.1 - DepthAI: 3.6.1 - oakctl: 0.18.6

By the way, should I worry about those libwebrtc errors? The device is deployed on a local area network (LAN). --- [upl-image-preview uuid=eb2f4670-7e7a-4a4c-9f15-622297dc0515 url=https://discuss.luxonis.com/assets/files/2026-05-09/1778308308-239591-image.png alt={TEXT?}]

@"MulongDeng"#p33682 - thanks for looking into this! Best, Oskar

Unknown state in app status - How to Troubleshoot and Resolve ?

MulongDeng

Hi all,

I'm seeing unknown state in oakctl app list and would appreciate some guidance on how to track down the root cause.

My questions:

What are the common causes?
What are the recommended troubleshooting steps?

Are there specific commands or tools the community uses to identify ?

What are typical fixes or preventive measures?

Thanks in advance for any pointers!

Luxonis OS: 1.30.1
DepthAI: 3.6.1
oakctl: 0.18.6

MulongDeng

By the way, should I worry about those libwebrtc errors?
The device is deployed on a local area network (LAN).

OskarSonc

Hey MulongDeng - unknown in oakctl app list usually means oakctl/oak-agent can’t determine the app’s current state. It’s often a symptom, not the root cause.

I’d start with:

oakctl app list --long
oakctl app logs <app-id> -n 5000 --no-follow
oakctl device info

Then try:

oakctl app stop <app-id>
oakctl app start <app-id>

If SSH is enabled, journalctl -u oak-agent -b --no-pager is also useful.

About the libwebrtc errors:,if you are using the app directly on the LAN via the device IP, those are usually not the main problem. They often just mean the remote WebRTC/signaling path can’t resolve/connect. I’d focus on the app logs first.

If you share the app logs and oak-agent logs, it should be easier to pinpoint the cause.

MulongDeng

I attempted to check the application logs and restart the service, but encountered the following error: Received an error RPC response: Container service encountered an IO error: Container does not exist. As a temporary workaround, I reinstalled the application. Should this issue recur, I will provide the journalctl logs for further investigation.

OskarSonc

MulongDeng - thanks for looking into this!

Best,
Oskar

MulongDeng

1. The app produces no logs whatsoever — the log files are completely empty.
2. The app can be stopped but fails to start.
3. The journalctl output is restricted to lib-webrtc entries, with no other components appearing in the logs.

~ # journalctl -u oak-agent -b --no-pager
May 14 07:01:38 kalama oak-agent[1683]: DEBUG [reqwest::connect]: starting new connection: http://time.cloud.luxonis.com/
May 14 07:01:41 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:01:43 kalama oak-agent[1683]: WARN [oak-agent::modules::time_sync {error: error sending request for url (http://time.cloud.luxonis.com/now-signed): operation timed out}]: Request to time server failed, retrying after 881.318927ms
May 14 07:01:44 kalama oak-agent[1683]: DEBUG [reqwest::connect]: starting new connection: http://time.cloud.luxonis.com/
May 14 07:01:46 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
May 14 07:01:49 kalama oak-agent[1683]: ERROR [oak-agent::modules::time_sync {error: Time server request failed (None): error sending request for url (http://time.cloud.luxonis.com/now-signed): operation timed out}]: Time sync attempt failed, retrying in 300s
May 14 07:02:06 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:02:11 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
May 14 07:02:31 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:02:36 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
May 14 07:02:56 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:03:01 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
May 14 07:03:21 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:03:26 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
May 14 07:03:46 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:03:51 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
May 14 07:04:11 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:04:16 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
May 14 07:04:36 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:04:41 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
May 14 07:05:01 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:05:07 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
May 14 07:05:26 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:05:31 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
May 14 07:05:51 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:05:56 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
May 14 07:06:17 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:06:22 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
May 14 07:06:41 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:06:47 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
May 14 07:06:48 kalama oak-agent[1683]: INFO [oak-agent::modules::time_sync]: Synchronizing system time
May 14 07:06:48 kalama oak-agent[1683]: DEBUG [reqwest::connect]: starting new connection: http://time.cloud.luxonis.com/
May 14 07:06:53 kalama oak-agent[1683]: WARN [oak-agent::modules::time_sync {error: error sending request for url (http://time.cloud.luxonis.com/now-signed): operation timed out}]: Request to time server failed, retrying after 919.863015ms
May 14 07:06:54 kalama oak-agent[1683]: DEBUG [reqwest::connect]: starting new connection: http://time.cloud.luxonis.com/
May 14 07:06:59 kalama oak-agent[1683]: WARN [oak-agent::modules::time_sync {error: error sending request for url (http://time.cloud.luxonis.com/now-signed): operation timed out}]: Request to time server failed, retrying after 932.778269ms
May 14 07:07:00 kalama oak-agent[1683]: DEBUG [reqwest::connect]: starting new connection: http://time.cloud.luxonis.com/
May 14 07:07:05 kalama oak-agent[1683]: WARN [oak-agent::modules::time_sync {error: error sending request for url (http://time.cloud.luxonis.com/now-signed): operation timed out}]: Request to time server failed, retrying after 991.782457ms
May 14 07:07:07 kalama oak-agent[1683]: DEBUG [reqwest::connect]: starting new connection: http://time.cloud.luxonis.com/
May 14 07:07:07 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:07:11 kalama oak-agent[1683]: WARN [oak-agent::modules::time_sync {error: error sending request for url (http://time.cloud.luxonis.com/now-signed): operation timed out}]: Request to time server failed, retrying after 745.988041ms
May 14 07:07:11 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
May 14 07:07:12 kalama oak-agent[1683]: DEBUG [reqwest::connect]: starting new connection: http://time.cloud.luxonis.com/
May 14 07:07:17 kalama oak-agent[1683]: WARN [oak-agent::modules::time_sync {error: error sending request for url (http://time.cloud.luxonis.com/now-signed): operation timed out}]: Request to time server failed, retrying after 679.467827ms
May 14 07:07:18 kalama oak-agent[1683]: DEBUG [reqwest::connect]: starting new connection: http://time.cloud.luxonis.com/
May 14 07:07:23 kalama oak-agent[1683]: ERROR [oak-agent::modules::time_sync {error: Time server request failed (None): error sending request for url (http://time.cloud.luxonis.com/now-signed): operation timed out}]: Time sync attempt failed, retrying in 300s
May 14 07:07:26 kalama oak-agent[1683]: INFO [oak_agent::modules::monitor::entrypoint]: Current time: SystemTime { tv_sec: 1778713646, tv_nsec: 839115995 }
May 14 07:07:32 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:07:37 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
May 14 07:07:56 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:08:02 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
May 14 07:08:22 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:08:26 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
May 14 07:08:47 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:08:52 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
May 14 07:09:12 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:09:17 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
May 14 07:09:37 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:09:42 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
May 14 07:10:02 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:10:07 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
May 14 07:10:27 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:10:32 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
May 14 07:10:52 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:10:57 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
May 14 07:11:17 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:11:22 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
May 14 07:11:42 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:11:47 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
May 14 07:12:07 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:12:12 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
May 14 07:12:23 kalama oak-agent[1683]: INFO [oak-agent::modules::time_sync]: Synchronizing system time
May 14 07:12:23 kalama oak-agent[1683]: DEBUG [reqwest::connect]: starting new connection: http://time.cloud.luxonis.com/
May 14 07:12:28 kalama oak-agent[1683]: WARN [oak-agent::modules::time_sync {error: error sending request for url (http://time.cloud.luxonis.com/now-signed): operation timed out}]: Request to time server failed, retrying after 867.048621ms
May 14 07:12:29 kalama oak-agent[1683]: DEBUG [reqwest::connect]: starting new connection: http://time.cloud.luxonis.com/
May 14 07:12:32 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:12:34 kalama oak-agent[1683]: WARN [oak-agent::modules::time_sync {error: error sending request for url (http://time.cloud.luxonis.com/now-signed): operation timed out}]: Request to time server failed, retrying after 952.755213ms
May 14 07:12:35 kalama oak-agent[1683]: DEBUG [reqwest::connect]: starting new connection: http://time.cloud.luxonis.com/
May 14 07:12:37 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
May 14 07:12:40 kalama oak-agent[1683]: WARN [oak-agent::modules::time_sync {error: error sending request for url (http://time.cloud.luxonis.com/now-signed): operation timed out}]: Request to time server failed, retrying after 632.8004ms
May 14 07:12:40 kalama oak-agent[1683]: DEBUG [reqwest::connect]: starting new connection: http://time.cloud.luxonis.com/
May 14 07:12:45 kalama oak-agent[1683]: WARN [oak-agent::modules::time_sync {error: error sending request for url (http://time.cloud.luxonis.com/now-signed): operation timed out}]: Request to time server failed, retrying after 573.354244ms
May 14 07:12:46 kalama oak-agent[1683]: DEBUG [reqwest::connect]: starting new connection: http://time.cloud.luxonis.com/
May 14 07:12:51 kalama oak-agent[1683]: WARN [oak-agent::modules::time_sync {error: error sending request for url (http://time.cloud.luxonis.com/now-signed): operation timed out}]: Request to time server failed, retrying after 838.588327ms
May 14 07:12:52 kalama oak-agent[1683]: DEBUG [reqwest::connect]: starting new connection: http://time.cloud.luxonis.com/
May 14 07:12:57 kalama oak-agent[1683]: ERROR [oak-agent::modules::time_sync {error: Time server request failed (None): error sending request for url (http://time.cloud.luxonis.com/now-signed): operation timed out}]: Time sync attempt failed, retrying in 300s
May 14 07:12:57 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:13:02 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
May 14 07:13:22 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:13:27 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
May 14 07:13:47 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:13:52 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
May 14 07:14:12 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:14:17 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
May 14 07:14:37 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:14:42 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
May 14 07:15:02 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:15:07 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
May 14 07:15:27 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:15:32 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
May 14 07:15:52 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:15:57 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
May 14 07:16:17 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:16:22 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
May 14 07:16:42 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:16:47 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
May 14 07:17:07 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:17:12 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
May 14 07:17:32 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:17:37 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
May 14 07:17:57 kalama oak-agent[1683]: INFO [oak-agent::modules::time_sync]: Synchronizing system time
May 14 07:17:57 kalama oak-agent[1683]: DEBUG [reqwest::connect]: starting new connection: http://time.cloud.luxonis.com/
May 14 07:17:57 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:18:02 kalama oak-agent[1683]: WARN [oak-agent::modules::time_sync {error: error sending request for url (http://time.cloud.luxonis.com/now-signed): operation timed out}]: Request to time server failed, retrying after 516.019927ms
May 14 07:18:02 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
May 14 07:18:02 kalama oak-agent[1683]: DEBUG [reqwest::connect]: starting new connection: http://time.cloud.luxonis.com/
May 14 07:18:07 kalama oak-agent[1683]: WARN [oak-agent::modules::time_sync {error: error sending request for url (http://time.cloud.luxonis.com/now-signed): operation timed out}]: Request to time server failed, retrying after 534.05419ms
May 14 07:18:08 kalama oak-agent[1683]: DEBUG [reqwest::connect]: starting new connection: http://time.cloud.luxonis.com/
May 14 07:18:13 kalama oak-agent[1683]: WARN [oak-agent::modules::time_sync {error: error sending request for url (http://time.cloud.luxonis.com/now-signed): operation timed out}]: Request to time server failed, retrying after 813.555866ms
May 14 07:18:14 kalama oak-agent[1683]: DEBUG [reqwest::connect]: starting new connection: http://time.cloud.luxonis.com/
May 14 07:18:19 kalama oak-agent[1683]: WARN [oak-agent::modules::time_sync {error: error sending request for url (http://time.cloud.luxonis.com/now-signed): operation timed out}]: Request to time server failed, retrying after 946.742088ms
May 14 07:18:20 kalama oak-agent[1683]: DEBUG [reqwest::connect]: starting new connection: http://time.cloud.luxonis.com/
May 14 07:18:22 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:18:25 kalama oak-agent[1683]: WARN [oak-agent::modules::time_sync {error: error sending request for url (http://time.cloud.luxonis.com/now-signed): operation timed out}]: Request to time server failed, retrying after 779.002756ms
May 14 07:18:25 kalama oak-agent[1683]: DEBUG [reqwest::connect]: starting new connection: http://time.cloud.luxonis.com/
May 14 07:18:27 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
May 14 07:18:30 kalama oak-agent[1683]: ERROR [oak-agent::modules::time_sync {error: Time server request failed (None): error sending request for url (http://time.cloud.luxonis.com/now-signed): operation timed out}]: Time sync attempt failed, retrying in 300s
May 14 07:18:47 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:18:52 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
May 14 07:19:12 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:19:17 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
May 14 07:19:37 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:19:42 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
May 14 07:20:02 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:20:07 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
May 14 07:20:27 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:20:32 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
May 14 07:20:52 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:20:57 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
May 14 07:21:17 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:21:22 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
May 14 07:21:42 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:21:47 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
May 14 07:22:08 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:22:12 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
May 14 07:22:31 kalama oak-agent[1683]: INFO [oak-agent::modules::public_api_tcp]: TCP: Connection closed
May 14 07:22:31 kalama oak-agent[1683]: INFO [oak-agent::modules::public_api_tcp]: TCP: New connection established
May 14 07:22:31 kalama oak-agent[1683]: DEBUG [rustls::server::hs]: decided upon suite TLS13_AES_256_GCM_SHA384
May 14 07:22:31 kalama oak-agent[1683]: DEBUG [lib-tcp-server-multi]: task[tcp-writer]: Started
May 14 07:22:31 kalama oak-agent[1683]: DEBUG [lib-tcp-server-multi]: task[tcp-reader]: Started
May 14 07:22:31 kalama oak-agent[1683]: ERROR [oak_agent::modules::context::configuration]: Password hasher error: IncorrectPassword
May 14 07:22:31 kalama oak-agent[1683]: WARN [oak-agent::modules::core]: Device password verification failed
May 14 07:22:31 kalama oak-agent[1683]: ERROR [oak_agent::modules::context::configuration]: Password hasher error: IncorrectPassword
May 14 07:22:31 kalama oak-agent[1683]: WARN [oak-agent::modules::core]: Device password verification failed
May 14 07:22:33 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:22:34 kalama oak-agent[1683]: DEBUG [lib-tcp-server-multi]: Connection closed
May 14 07:22:34 kalama oak-agent[1683]: DEBUG [lib-tcp-server-multi]: task[tcp-reader]: Finished
May 14 07:22:34 kalama oak-agent[1683]: INFO [oak-agent::modules::public_api_tcp]: Closed stream!
May 14 07:22:34 kalama oak-agent[1683]: DEBUG [lib-tcp-server-multi]: Connection closed
May 14 07:22:34 kalama oak-agent[1683]: DEBUG [rustls::common_state]: Sending warning alert CloseNotify
May 14 07:22:34 kalama oak-agent[1683]: DEBUG [lib-tcp-server-multi]: task[tcp-writer]: Finished
May 14 07:22:38 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
May 14 07:22:56 kalama oak-agent[1683]: INFO [oak-agent::modules::public_api_tcp]: TCP: Connection closed
May 14 07:22:56 kalama oak-agent[1683]: INFO [oak-agent::modules::public_api_tcp]: TCP: New connection established
May 14 07:22:56 kalama oak-agent[1683]: DEBUG [rustls::server::hs]: decided upon suite TLS13_AES_256_GCM_SHA384
May 14 07:22:56 kalama oak-agent[1683]: DEBUG [lib-tcp-server-multi]: task[tcp-writer]: Started
May 14 07:22:56 kalama oak-agent[1683]: DEBUG [lib-tcp-server-multi]: task[tcp-reader]: Started
May 14 07:22:56 kalama oak-agent[1683]: DEBUG [lib-tcp-server-multi]: Connection closed
May 14 07:22:56 kalama oak-agent[1683]: DEBUG [lib-tcp-server-multi]: task[tcp-reader]: Finished
May 14 07:22:56 kalama oak-agent[1683]: INFO [oak-agent::modules::public_api_tcp]: Closed stream!
May 14 07:22:56 kalama oak-agent[1683]: DEBUG [lib-tcp-server-multi]: Connection closed
May 14 07:22:56 kalama oak-agent[1683]: DEBUG [rustls::common_state]: Sending warning alert CloseNotify
May 14 07:22:56 kalama oak-agent[1683]: DEBUG [lib-tcp-server-multi]: task[tcp-writer]: Finished
May 14 07:22:57 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:23:03 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
May 14 07:23:22 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:23:27 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
May 14 07:23:30 kalama oak-agent[1683]: INFO [oak-agent::modules::time_sync]: Synchronizing system time
May 14 07:23:30 kalama oak-agent[1683]: DEBUG [reqwest::connect]: starting new connection: http://time.cloud.luxonis.com/
May 14 07:23:35 kalama oak-agent[1683]: WARN [oak-agent::modules::time_sync {error: error sending request for url (http://time.cloud.luxonis.com/now-signed): operation timed out}]: Request to time server failed, retrying after 970.336139ms
May 14 07:23:36 kalama oak-agent[1683]: DEBUG [reqwest::connect]: starting new connection: http://time.cloud.luxonis.com/
May 14 07:23:41 kalama oak-agent[1683]: WARN [oak-agent::modules::time_sync {error: error sending request for url (http://time.cloud.luxonis.com/now-signed): operation timed out}]: Request to time server failed, retrying after 825.804353ms
May 14 07:23:42 kalama oak-agent[1683]: DEBUG [reqwest::connect]: starting new connection: http://time.cloud.luxonis.com/
May 14 07:23:47 kalama oak-agent[1683]: WARN [oak-agent::modules::time_sync {error: error sending request for url (http://time.cloud.luxonis.com/now-signed): operation timed out}]: Request to time server failed, retrying after 987.46407ms
May 14 07:23:48 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:23:48 kalama oak-agent[1683]: DEBUG [reqwest::connect]: starting new connection: http://time.cloud.luxonis.com/
May 14 07:23:52 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
May 14 07:23:53 kalama oak-agent[1683]: WARN [oak-agent::modules::time_sync {error: error sending request for url (http://time.cloud.luxonis.com/now-signed): operation timed out}]: Request to time server failed, retrying after 618.571751ms
May 14 07:23:54 kalama oak-agent[1683]: DEBUG [reqwest::connect]: starting new connection: http://time.cloud.luxonis.com/
May 14 07:23:59 kalama oak-agent[1683]: WARN [oak-agent::modules::time_sync {error: error sending request for url (http://time.cloud.luxonis.com/now-signed): operation timed out}]: Request to time server failed, retrying after 628.191188ms
May 14 07:23:59 kalama oak-agent[1683]: DEBUG [reqwest::connect]: starting new connection: http://time.cloud.luxonis.com/
May 14 07:24:03 kalama oak-agent[1683]: INFO [oak-agent::modules::public_api_tcp]: TCP: Connection closed
May 14 07:24:03 kalama oak-agent[1683]: INFO [oak-agent::modules::public_api_tcp]: TCP: New connection established
May 14 07:24:03 kalama oak-agent[1683]: DEBUG [rustls::server::hs]: decided upon suite TLS13_AES_256_GCM_SHA384
May 14 07:24:03 kalama oak-agent[1683]: DEBUG [lib-tcp-server-multi]: task[tcp-writer]: Started
May 14 07:24:03 kalama oak-agent[1683]: DEBUG [lib-tcp-server-multi]: task[tcp-reader]: Started
May 14 07:24:03 kalama oak-agent[1683]: DEBUG [lib-tcp-server-multi]: Connection closed
May 14 07:24:03 kalama oak-agent[1683]: DEBUG [lib-tcp-server-multi]: task[tcp-reader]: Finished
May 14 07:24:03 kalama oak-agent[1683]: INFO [oak-agent::modules::public_api_tcp]: Closed stream!
May 14 07:24:03 kalama oak-agent[1683]: DEBUG [lib-tcp-server-multi]: Connection closed
May 14 07:24:03 kalama oak-agent[1683]: DEBUG [rustls::common_state]: Sending warning alert CloseNotify
May 14 07:24:03 kalama oak-agent[1683]: DEBUG [lib-tcp-server-multi]: task[tcp-writer]: Finished
May 14 07:24:05 kalama oak-agent[1683]: ERROR [oak-agent::modules::time_sync {error: Time server request failed (None): error sending request for url (http://time.cloud.luxonis.com/now-signed): operation timed out}]: Time sync attempt failed, retrying in 300s
May 14 07:24:13 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:24:18 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
May 14 07:24:38 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:24:43 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
May 14 07:25:03 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:25:08 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
May 14 07:25:28 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:25:29 kalama oak-agent[1683]: INFO [oak-agent::modules::public_api_tcp]: TCP: Connection closed
May 14 07:25:29 kalama oak-agent[1683]: INFO [oak-agent::modules::public_api_tcp]: TCP: New connection established
May 14 07:25:29 kalama oak-agent[1683]: DEBUG [rustls::server::hs]: decided upon suite TLS13_AES_256_GCM_SHA384
May 14 07:25:29 kalama oak-agent[1683]: DEBUG [lib-tcp-server-multi]: task[tcp-writer]: Started
May 14 07:25:29 kalama oak-agent[1683]: DEBUG [lib-tcp-server-multi]: task[tcp-reader]: Started
May 14 07:25:29 kalama oak-agent[1683]: DEBUG [lib-tcp-server-multi]: Connection closed
May 14 07:25:29 kalama oak-agent[1683]: DEBUG [lib-tcp-server-multi]: task[tcp-reader]: Finished
May 14 07:25:29 kalama oak-agent[1683]: INFO [oak-agent::modules::public_api_tcp]: Closed stream!
May 14 07:25:29 kalama oak-agent[1683]: DEBUG [lib-tcp-server-multi]: Connection closed
May 14 07:25:29 kalama oak-agent[1683]: DEBUG [rustls::common_state]: Sending warning alert CloseNotify
May 14 07:25:29 kalama oak-agent[1683]: DEBUG [lib-tcp-server-multi]: task[tcp-writer]: Finished
May 14 07:25:33 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
May 14 07:25:53 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:25:58 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
May 14 07:26:18 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:26:23 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
May 14 07:26:43 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:26:48 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
May 14 07:27:08 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:27:13 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
May 14 07:27:33 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:27:38 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
May 14 07:27:58 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:28:03 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
May 14 07:28:23 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:28:28 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
May 14 07:28:48 kalama oak-agent[1683]: WARN [lib-webrtc {error: Failed to connect: IO error: failed to lookup address information: Temporary failure in name resolution}]: Signaling connection: failed to connect to WebSocket, retrying after 5s
May 14 07:28:53 kalama oak-agent[1683]: DEBUG [lib-webrtc {url: wss://signal.cloud.luxonis.com/agent/}]: Connecting to signaling server
~ #

OskarSonc

Thanks for the additional details. We’ve seen similar internal cases where an app ends up in unknown state and oakctl app start fails with Container does not exist, which points more to an oak-agent app/container state mismatch than to the lib-webrtc warnings.

Please first update to the latest available versions on both sides. The current oakctl release is 0.20.0, and the device should also be updated to the latest Luxonis OS / oak-agent.

If this happens again, before reinstalling the app, please capture:

oakctl app list --long
oakctl device info
cat /overlay/oak-agent/storage/apps.json
ls -l /overlay/oak-agent/containers/containers
journalctl -u oak-agent -b --no-pager

Reinstalling the app is a valid workaround for now, but the data above would help confirm the root cause if it recurs.

MulongDeng

Noted with thanks. I'll make sure to capture and post it here should it happen again.

MulongDeng

It appears that Python application errors are generating core dump files, which are rapidly consuming storage space. Each core dump file is approximately 1 GB in size. The application errors are related to XLink failures, which occur frequently—sometimes during startup, and sometimes during normal operation.

[local] [2026-05-27 10:04:17.943] [depthai] [error] Communication exception - possible device error/misconfiguration. Original message 'Couldn't read data from stream: '__x_19_outputs_spatial_location' (X_LINK_ERROR)'
[local] [2026-05-27 10:04:17.943] [depthai] [error] Communication exception - possible device error/misconfiguration. Original message 'Couldn't read data from stream: '__x_19_outputs_classify' (X_LINK_ERROR)'
[local] [2026-05-27 10:04:17.943] [depthai] [error] Communication exception - possible device error/misconfiguration. Original message 'Couldn't read data from stream: '__x_19_outputs_depth' (X_LINK_ERROR)'
[local] [2026-05-27 10:04:17.943] [depthai] [error] Communication exception - possible device error/misconfiguration. Original message 'Couldn't read data from stream: '__x_19_outputs_detect' (X_LINK_ERROR)'
[local] [2026-05-27 10:04:17.943] [depthai] [error] Communication exception - possible device error/misconfiguration. Original message 'Couldn't read data from stream: '__x_19_outputs_video' (X_LINK_ERROR)'
[local] [2026-05-27 10:04:17.943] [depthai] [error] Communication exception - possible device error/misconfiguration. Original message 'Couldn't read data from stream: '__x_23__output' (X_LINK_ERROR)'
[local] [2026-05-27 10:04:21.370] [ThreadedNode] [error] Node threw exception, stopping the node. Exception message: Communication exception - possible device error/misconfiguration. Original message 'Couldn't read data from stream: '__x_19_outputs_depth' (X_LINK_ERROR)'
[local] [2026-05-27 10:04:21.370] [ThreadedNode] [error] Node threw exception, stopping the node. Exception message: Communication exception - possible device error/misconfiguration. Original message 'Couldn't read data from stream: '__x_19_outputs_classify' (X_LINK_ERROR)'
[local] [2026-05-27 10:04:21.370] [ThreadedNode] [error] Node threw exception, stopping the node. Exception message: Communication exception - possible device error/misconfiguration. Original message 'Couldn't read data from stream: '__x_19_outputs_spatial_location' (X_LINK_ERROR)'
[local] [2026-05-27 10:04:21.370] [ThreadedNode] [error] Node threw exception, stopping the node. Exception message: Communication exception - possible device error/misconfiguration. Original message 'Couldn't read data from stream: '__x_23__output' (X_LINK_ERROR)'
[local] [2026-05-27 10:04:21.370] [ThreadedNode] [error] Node threw exception, stopping the node. Exception message: Communication exception - possible device error/misconfiguration. Original message 'Couldn't read data from stream: '__x_19_outputs_detect' (X_LINK_ERROR)'
[local] [2026-05-27 10:04:21.370] [ThreadedNode] [error] Node threw exception, stopping the node. Exception message: Communication exception - possible device error/misconfiguration. Original message 'Couldn't read data from stream: '__x_19_outputs_video' (X_LINK_ERROR)'

OskarSonc

MulongDeng - which version OS are you running? There were some fixes in latest versions for long logs taking up space....

MulongDeng

OskarSonc
Is it possible to disable core dumps in depthai-core release builds?

MulongDeng

Luxonis OS: 1.32.1
DepthAI: 3.6.1
oakctl: 0.22.0

OskarSonc

MulongDeng - thanks for the follow-up. Since you are already on a current stack (Luxonis OS 1.32.1, DepthAI 3.6.1, oakctl 0.22.0), this does not look like an outdated-version issue.

The large 1 GB files are likely Linux core dumps of the Python process, which are different from DepthAI crash dumps. As far as I can confirm, there is no special depthai-core release-build switch to disable Linux core dumps. That behavior is typically controlled at the OS/container level, not by the DepthAI build itself.

If you want to disable DepthAI crash dump saving, you can try:

DEPTHAI_CRASHDUMP=0

But if the files are true core / core.* files, those need to be disabled separately via the OS core dump settings.

The repeated X_LINK_ERROR messages still suggest an underlying runtime/device/pipeline failure, with the XLink errors being the symptom. If you can, please share:

the exact filenames and paths of the 1 GB dump files
output of ls -lh on those files
output of ulimit -c
output of cat /proc/sys/kernel/core_pattern

Thanks,
Oskar

MulongDeng

My current setup runs on luxonis/oakapp-base:1.2.8.

oakctl app exec -i 00000 bash

Executing command inside container 00000000-0000-0000-0000-000000000000 ...
root@00000000:/# ulimit -c
unlimited
root@00000000:/# cat /proc/sys/kernel/core_pattern
core.%p
root@00000000:/# ls -lh /app/examples/ems_standalone/
total 4.5G
-rw-r--r--. 1 root root 132K May 28 09:14 2012742817.info.log
-rw-r--r--. 1 root root  13K May 28 09:14 2012742817.state.json
-rw-r--r--. 1 root root  787 May 22 07:01 README.md
drwxr-xr-x. 1 root root 4.0K May 28 08:55 __pycache__
-rw-r--r--. 1 root root 2.7K May 22 07:01 config_service.py
-rw-------. 1 root root 1.9G May 28 09:05 core.146
-rw-------. 1 root root 2.0G May 28 09:03 core.17
-rw-------. 1 root root 1.9G May 28 09:07 core.223
-rw-------. 1 root root 1.8G May 28 09:07 core.311
-rw-r--r--. 1 root root 7.8K May 22 07:01 depth_test.py
-rw-r--r--. 1 root root 2.6K May 22 07:01 frontend_server.old.py
-rw-r--r--. 1 root root 4.2K May 22 07:01 frontend_server.py
-rw-r--r--. 1 root root  15K May 22 07:01 http_server.py
-rw-r--r--. 1 root root  39K May 22 07:01 http_server_new1.py
-rw-r--r--. 1 root root 7.4K May 25 03:33 mail_config.schema.json
-rw-r--r--. 1 root root 3.0K May 25 08:39 mail_config.yaml
-rw-r--r--. 1 root root  18K May 25 03:33 mail_config_tutorial.md
-rw-r--r--. 1 root root  51K May 28 08:47 mail_digitization_run_host_node.py
-rw-r--r--. 1 root root  41K May 22 07:01 mail_digitization_run_legacy_backup.py
-rw-r--r--. 1 root root  16K May 22 07:01 point_fit.py
-rw-r--r--. 1 root root  16K May 22 07:01 point_fit_new.py
-rw-r--r--. 1 root root  275 May 22 07:01 service_registry.py
root@00000000:/#

OskarSonc

MulongDeng - Thanks, this confirms the core.* files are normal Linux core dumps from the Python process, not a special DepthAI release-build feature.

To stop them, disable coredumps in the container startup, for example by running the app with:

ulimit -c 0

If you also want to disable DepthAI crashdump saving, set:

DEPTHAI_CRASHDUMP=0

The X_LINK_ERROR problem is still the underlying crash; the large core.* files are just the result.

Best,
Oskar