# Error: Request error: tunneling socket could not be established, cause=socket hang up **URL:** \ **Category:** Product support\ **Created:** [February 4, 2020, 10:04am UTC](https://forums.balena.io/t/error-request-error-tunneling-socket-could-not-be-established-cause-socket-hang-up/61045 "2020-02-04T10:04:59Z")\ **Posts on this page:** 13\ **Page:** 1
**Author:** ![rquant](https://avatars.discourse-cdn.com/v4/letter/r/ec9cab/32.png) [@rquant](https://forums.balena.io/u/rquant)\ **Post date:** [February 4, 2020, 10:04am UTC](https://forums.balena.io/t/error-request-error-tunneling-socket-could-not-be-established-cause-socket-hang-up/61045/1 "2020-02-04T10:04:59Z")
Hello, one of my devices Intel NUC has following issue when I try to reboot/restart the device. Request error: tunneling socket could not be established, cause=socket hang up. Additionally when trying to Shell into main: Spawning shell… Application container must be running for a terminal to be started. SSH session disconnected I can only reboot via reboot now (in HostOS shell). I rebooted and get the same problem. Does anyone know what is going on? Balena daemon corrupted? Thanks ---
**Author:** ![anujdeshpande](https://sea2.discourse-cdn.com/balena/user_avatar/forums.balena.io/anujdeshpande/32/3155_2.png) [@anujdeshpande](https://forums.balena.io/u/anujdeshpande)\ **Post date:** [February 4, 2020, 10:58am UTC](https://forums.balena.io/t/error-request-error-tunneling-socket-could-not-be-established-cause-socket-hang-up/61045/3 "2020-02-04T10:58:26Z")
Hi Can you grant support access to this device so that we can take a look? ---
**Author:** ![rquant](https://avatars.discourse-cdn.com/v4/letter/r/ec9cab/32.png) [@rquant](https://forums.balena.io/u/rquant)\ **Post date:** [February 10, 2020, 7:17pm UTC](https://forums.balena.io/t/error-request-error-tunneling-socket-could-not-be-established-cause-socket-hang-up/61045/5 "2020-02-10T19:17:39Z")
Hey, sent permission via PM last week. Any news on this? ---
**Author:** ![rquant](https://avatars.discourse-cdn.com/v4/letter/r/ec9cab/32.png) [@rquant](https://forums.balena.io/u/rquant)\ **Post date:** [February 11, 2020, 10:01am UTC](https://forums.balena.io/t/error-request-error-tunneling-socket-could-not-be-established-cause-socket-hang-up/61045/8 "2020-02-11T10:01:12Z")
Hi, some of my other sensors have the same problem now. On one of the devices I updated balenaOS, since I did not see any other option. It says Update successful, rebooting. Now it is not coming online anymore. ---
**Author:** ![tmigone](https://sea2.discourse-cdn.com/balena/user_avatar/forums.balena.io/tmigone/32/2814_2.png) [@tmigone](https://forums.balena.io/u/tmigone)\ **Post date:** [February 11, 2020, 6:20pm UTC](https://forums.balena.io/t/error-request-error-tunneling-socket-could-not-be-established-cause-socket-hang-up/61045/9 "2020-02-11T18:20:51Z")
Hello, my first suggestion would be to look into device health checks to see if there is an obvious problem. You can run them from the `DIAGNOSTICS` tab on the device dashboard. Please let us know how that goes. ---
**Author:** ![rquant](https://avatars.discourse-cdn.com/v4/letter/r/ec9cab/32.png) [@rquant](https://forums.balena.io/u/rquant)\ **Post date:** [February 12, 2020, 1:15pm UTC](https://forums.balena.io/t/error-request-error-tunneling-socket-could-not-be-established-cause-socket-hang-up/61045/11 "2020-02-12T13:15:19Z")
![2020-02-12 13_20_43-balenaCloud _ A1_001](https://global.discourse-cdn.com/balena/original/2X/f/f59e00f887045f2d26e6526ff514edb59c6385fa.png) ---
**Author:** ![gelbal](https://sea2.discourse-cdn.com/balena/user_avatar/forums.balena.io/gelbal/32/1109_2.png) [@gelbal](https://forums.balena.io/u/gelbal)\ **Post date:** [February 12, 2020, 3:01pm UTC](https://forums.balena.io/t/error-request-error-tunneling-socket-could-not-be-established-cause-socket-hang-up/61045/12 "2020-02-12T15:01:42Z")
Thanks for the info @rquant. Can you please update balenaOS to the latest version? Relevant docs are here: [https://www.balena.io/docs/reference/OS/updates/self-service/](https://www.balena.io/docs/reference/OS/updates/self-service/) We see that `check_balenaOS` failed because your device is running a version that we pulled back as it had issues. So it’s best for your device(s) to run on the latest reliable balenaOS version. Let us know if you encounter any issues with the balenaOS update or experience any further issues once the update goes through. ---
**Author:** ![rquant](https://avatars.discourse-cdn.com/v4/letter/r/ec9cab/32.png) [@rquant](https://forums.balena.io/u/rquant)\ **Post date:** [February 12, 2020, 3:15pm UTC](https://forums.balena.io/t/error-request-error-tunneling-socket-could-not-be-established-cause-socket-hang-up/61045/14 "2020-02-12T15:15:07Z")
Hello, I did that yesterday on a device which had the same problems. It says as Status: Update successful, rebooting (yellow text) Last Online Online (for 4 hours) I still cannot reach the app container console or use Public URL to reach the device. Nor does the status change. I can enter the BalenaOS terminal and type reboot now. It will reboot and show the same status again and app container not running. ![2020-02-12 16_14_05-balenaCloud _ DEV-5](https://global.discourse-cdn.com/balena/original/2X/a/aa98a26fd6e42dd609548c5220747a36c4e310b6.png) ---
**Author:** ![gelbal](https://sea2.discourse-cdn.com/balena/user_avatar/forums.balena.io/gelbal/32/1109_2.png) [@gelbal](https://forums.balena.io/u/gelbal)\ **Post date:** [February 12, 2020, 3:37pm UTC](https://forums.balena.io/t/error-request-error-tunneling-socket-could-not-be-established-cause-socket-hang-up/61045/17 "2020-02-12T15:37:07Z")
Let’s take a further look at the device. Could you please grant us support access and send us the device UUID via private message again? ---
**Author:** ![xginn8](https://avatars.discourse-cdn.com/v4/letter/x/8baadc/32.png) [@xginn8](https://forums.balena.io/u/xginn8)\ **Post date:** [February 12, 2020, 4:37pm UTC](https://forums.balena.io/t/error-request-error-tunneling-socket-could-not-be-established-cause-socket-hang-up/61045/27 "2020-02-12T16:37:52Z")
Hi there @rquant, Thanks for providing those UUIDs and enabling support access. In order to recover the devices I may need to remove & re-pull the images, is that something you are okay with at the moment? ---
**Author:** ![xginn8](https://avatars.discourse-cdn.com/v4/letter/x/8baadc/32.png) [@xginn8](https://forums.balena.io/u/xginn8)\ **Post date:** [February 12, 2020, 5:15pm UTC](https://forums.balena.io/t/error-request-error-tunneling-socket-could-not-be-established-cause-socket-hang-up/61045/31 "2020-02-12T17:15:16Z")
I was able to fully recover the device running balenaOS 2.39, which is now in the process of updating to the latest release. We had not seen this failure case before, but have begun tracking it internally to fix going forward. The other device dropped offline as I was investigating the issue (there is a different fundamental problem). If you see it come back online, feel free to ping us again and we can continue debugging the issue. Thank you for reporting these issues! ---
**Author:** ![rquant](https://avatars.discourse-cdn.com/v4/letter/r/ec9cab/32.png) [@rquant](https://forums.balena.io/u/rquant)\ **Post date:** [February 14, 2020, 1:21pm UTC](https://forums.balena.io/t/error-request-error-tunneling-socket-could-not-be-established-cause-socket-hang-up/61045/33 "2020-02-14T13:21:27Z")
Hello the device is online again. The reason why its offline sometimes is because its after opening hours of the store. ---
**Author:** ![xginn8](https://avatars.discourse-cdn.com/v4/letter/x/8baadc/32.png) [@xginn8](https://forums.balena.io/u/xginn8)\ **Post date:** [February 14, 2020, 2:10pm UTC](https://forums.balena.io/t/error-request-error-tunneling-socket-could-not-be-established-cause-socket-hang-up/61045/34 "2020-02-14T14:10:15Z")
Hi there, I was able to get that second device cleaned up and it is now also updating. Please let us know if you experience further issues!