# Mempool pruned on Umbrel **URL:** \ **Category:** Bitcoin\ **Created:** [November 15, 2026, 5:11pm UTC](https://paulscode.com/t/mempool-pruned-on-umbrel/1387 "2026-11-15T17:11:55Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![danmorales](https://paulscode.com/letter_avatar_proxy/v4/letter/d/82dd89/32.png) [@danmorales](https://paulscode.com/u/danmorales)\ **Post date:** [November 15, 2026, 5:11pm UTC](https://paulscode.com/t/mempool-pruned-on-umbrel/1387/1 "2026-11-15T17:11:55Z")
Hi, I’m running on Umbrel. Knots SHA 256 companion, and Electrs Pruned. IBD, indexing, compacting all completed and running smoothly, connects to wallets, transmits, etc.. all good. Then, added Mempool pruned, but it is not working. Tried using a bot to help me, no success. Here are the logs a few minutes after startup. Help? [umbrel\_paulscode-mempool-pruned\_2026-11-15\_10-09.log](https://paulscode.com/uploads/short-url/gvxGFlEIKhG0ybxvU1uNy7kkv00.log) (73.9 KB) ---
**Author:** ![paul](https://paulscode.com/user_avatar/paulscode.com/paul/32/337_2.png) [@paul](https://paulscode.com/u/paul)\ **Post date:** [November 15, 2026, 6:36pm UTC](https://paulscode.com/t/mempool-pruned-on-umbrel/1387/2 "2026-11-15T18:36:28Z")
The logs are unfortunately not helpful in this case. It is just saying it could not find what it was trying to connect to (401) without specifying what it was trying to connect to. Make sure you have Mempool Pruned pointing to the correct node and indexer (and of course make sure the indexer is pointing to the correct node). Right click \> Settings \> Connections ---
**Author:** ![danmorales](https://paulscode.com/letter_avatar_proxy/v4/letter/d/82dd89/32.png) [@danmorales](https://paulscode.com/u/danmorales)\ **Post date:** [November 15, 2026, 7:14pm UTC](https://paulscode.com/t/mempool-pruned-on-umbrel/1387/3 "2026-11-15T19:14:00Z")
Thanks for the quick response! Yes, everything is pointed correctly. The AI thought Mempool wasn’t connecting correctly and had me change the api environments for HOST, PORT, USERNAME, and PASSWORD. After this I actually can see one block, but it’s stuck about 7 blocks back. It progresses one block when the blockchain progresses, but stays stuck 7 blocks back. my most recent work with the bot: The proxy is fine — valid JSON back. The error is in mempool’s **own database read** (`formatDbBlockIntoExtendedBlock`), not from the proxy. Since we wiped `mysql/` and it’s still failing identically, this is a systematic issue, not random corruption. Let me check if this is a known issue: ---
**Author:** ![paul](https://paulscode.com/user_avatar/paulscode.com/paul/32/337_2.png) [@paul](https://paulscode.com/u/paul)\ **Post date:** [November 15, 2026, 7:17pm UTC](https://paulscode.com/t/mempool-pruned-on-umbrel/1387/4 "2026-11-15T19:17:15Z")
Yeh, all bets are off if the AI is going in and edting environment variables on your server (means I’m not working with the same setup that you are). I’ll see if I can recreate the original behavior, but in your case if the AI gets stuck you’ll probably need to uninstall Mempool Pruned and start over to get it back to something predictable. ---
**Author:** ![danmorales](https://paulscode.com/letter_avatar_proxy/v4/letter/d/82dd89/32.png) [@danmorales](https://paulscode.com/u/danmorales)\ **Post date:** [November 15, 2026, 7:21pm UTC](https://paulscode.com/t/mempool-pruned-on-umbrel/1387/5 "2026-11-15T19:21:15Z")
Yes, thank you. Been through that cycle too. Reinstalled it, checked that it was pointed at the electrs pruned and companion node (I’m running the Knots SHA256 companion, my full node is Horizon’s Knot Blake 2b on the same machine). Still won’t show anything… ---
**Author:** ![paul](https://paulscode.com/user_avatar/paulscode.com/paul/32/337_2.png) [@paul](https://paulscode.com/u/paul)\ **Post date:** [November 15, 2026, 7:22pm UTC](https://paulscode.com/t/mempool-pruned-on-umbrel/1387/6 "2026-11-15T19:22:33Z")
Ok, I’ll set up an Umbrel node with the same setup, to see if it has the same issue. Might take a couple days to fully sync (I’ll dig into the code in the mean time in case I can find the cause faster) ---
**Author:** ![paul](https://paulscode.com/user_avatar/paulscode.com/paul/32/337_2.png) [@paul](https://paulscode.com/u/paul)\ **Post date:** [November 15, 2026, 7:24pm UTC](https://paulscode.com/t/mempool-pruned-on-umbrel/1387/7 "2026-11-15T19:24:33Z")
If your AI is competitent, you could ask it to clone the source code for reference. If it finds the issue, ask it to put in a PR with the fix and I’ll review it. That isn’t necessary though (not trying to make you do the work for me, haha). ---
**Author:** ![danmorales](https://paulscode.com/letter_avatar_proxy/v4/letter/d/82dd89/32.png) [@danmorales](https://paulscode.com/u/danmorales)\ **Post date:** [November 15, 2026, 7:32pm UTC](https://paulscode.com/t/mempool-pruned-on-umbrel/1387/8 "2026-11-15T19:32:48Z")
No, I don’t think she’s very competent… Thanks Paul! You’re an angel. Sent some XBT sats for a coffee while you work. Appreciated.