Hi, i have a problem with my Umbrel Node. The LND daemon restarts repeatedly every several minutes and the only lightning Channel i have does not get online. I looked in the Logfiles and found this: 2022-02-03 16:32:13.741 [INF] LTND: Waiting for chain backend to finish sync, start_height=721658 …

Hey there, have you tried restarting yet? The only thing that I’m seeing is that you’re running out of memory due to your 2GB RAM, have you installed any additional apps recently prior to this issue occurring?

Thanks for answering! Yes i already tried restarting. No effect. RAM Usage is about 900B at the moment. 1,1GB free. Installed Apps: PiHole, RPC Explorer, BlueWallet Lightning Any Ideas for fixing it?

Hi, i have the same problem. Can anybody help? lnd | 2022-02-16 07:35:43.353 [INF] LTND: Waiting for chain backend to finish sync, start_height=723563 lnd | panic: unable to synchronize wallet to chain: failed to fetch block hash for height 713440: blo ck not found

I changed from 2GB to 8GB Raspi 4 and synched the complete Blockchain again. I still have the same Problem and also need help!

Did you try to re-flash the mSD card? [image] Umbrel Troubleshooting Guide Guides Edit by moderators The new, official troubleshooting guide can be found here: Huge thanks to DarthCoin for writing and maintaining the previous community version of the guide.

Yes. SD Card was reflashed. The problem still persists.

lnd log: livelog_lnd.txt (74.9 KB) debug log umbrel-1645018507412-debug.log (46.3 KB)

My umbrel shows no transactions in the bitcoin wallet. Seconds later, the transactions are displayed again. The status is constantly changing. Do you have the same issue? [no_transactions] [with_transactions]

@phlippie , do a reflash of SD card with last version, an also do a complete firmware and software update of RaspPi. To check firmware version use command ‘sudo rpi-eeprom-update’ and follow the instructions to update if needed. To check software version use command ‘sudo apt update’ , then up…

Everything done, but the problem still exists. :cry:

Lightning Channel Offline - failed to fetch block hash for height 710764: block not found

Support and Troubleshooting

phlippie February 16, 2022, 1:08pm 6

Did you try to re-flash the mSD card?

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Lightning Channel Offline - failed to fetch block hash for height 710764: block not found

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