Failed to fetch block from none error

Lsherring · June 6, 2021, 11:19pm

I have an error that keeps popping up but I have no clue on where to troubleshoot it. Any help would be much appreciated.

[3:48 PM]
2021-06-06T09:15:54.211 full_node full_node_server        : ERROR    Exception: Failed to fetch block 393084 from None, timed out <class 'ValueError'>, closing connection None. Traceback (most recent call last):
  File "chia\server\server.py", line 536, in api_call
  File "asyncio\tasks.py", line 414, in wait_for
  File "chia\server\server.py", line 533, in wrapped_coroutine
  File "chia\server\server.py", line 526, in wrapped_coroutine
  File "chia\full_node\full_node_api.py", line 104, in new_peak
  File "chia\full_node\full_node.py", line 373, in new_peak
  File "chia\full_node\full_node.py", line 322, in short_sync_backtrack
  File "chia\full_node\full_node.py", line 307, in short_sync_backtrack
ValueError: Failed to fetch block 393084 from None, timed out

It looks as if I had a chance to try to win a block but it failed and I have quite a few errors on this.

I’m perplexed.

Aspy68 · June 6, 2021, 11:38pm

The thing that stands out to me it that it failed to fetch the block from, “None”.

Looks like it could be a path error. EDIT: it is looking for an IP, not a path

Aspy68 · June 7, 2021, 12:03am

No answers yet, but you are not alone …

github.com/Chia-Network/chia-blockchain

ERROR Exception: Failed to fetch block XXXXXX from None

opened 03:28AM - 12 May 21 UTC

closed 03:21PM - 27 Jul 21 UTC

VisualWebTech

bug

**Describe the bug** Got this error (more than 3 times just saved the last two …logs and here is one of them the second one exactly the same just different block number) **Screenshots** 2021-05-11T15:39:13.937 full_node full_node_server : ERROR Exception: Failed to fetch block XXXXXX from None, timed out, None. Traceback (most recent call last): File "/home/hanzi/chia-blockchain/chia/server/server.py", line 521, in wrapped_coroutine result = await coroutine File "/home/XXXXX/chia-blockchain/chia/full_node/full_node_api.py", line 104, in new_peak return await self.full_node.new_peak(request, peer) File "/home/XXXXX/chia-blockchain/chia/full_node/full_node.py", line 360, in new_peak if await self.short_sync_backtrack( File "/home/XXXXXX/chia-blockchain/chia/full_node/full_node.py", line 310, in short_sync_backtrack raise e File "/home/XXXXXX/chia-blockchain/chia/full_node/full_node.py", line 295, in short_sync_backtrack raise ValueError(f"Failed to fetch block {curr_height} from {peer.get_peer_info()}, timed out") ValueError: Failed to fetch block 265981 from None, timed out **Desktop (please complete the following information):** - OS: Ubuntu desktop - OS Latest - CPU: AMD Ryzen 5800X 8 core 16 thread - 32GB memory - 2x Sebgent 2T NVME - Kingston SSD 240GB for OS **Additional context** Installed everything brand new 3 days ago no changes to any files programs or chia files running just chia and os any help will be really appreciated thanks

Also found this error which at least shows what should be there in place of, “None”:

ValueError: Failed to fetch block 103047 from {‘host’: ‘24.178.43.17’, ‘port’: 8444}, timed out.

So it is looking for an IP not a path, and the IP address it needs to look for is not being provided.

Aspy68 · June 7, 2021, 12:17am

I may have found your answer:

https://gitmemory.com/issue/Chia-Network/chia-blockchain/3643/831828371

If nothing else, I believe the above link reflects that this error message occurs when you drop a peer. As you drop peers regularly and pick up others, this may not really be an error unless you are getting lots of them.

P.S. I found this info using a google search for, “ValueError: Failed to fetch block from None”.

Lsherring · June 7, 2021, 12:43am

That makes sense as I have been closing out zombie peers that just stay at 0/0 or .01/0.

Thank you for the research! Have a great day.

codinghorror · June 8, 2021, 12:47am

We don’t need 6 different topics on the same error.