13
votes
Our parachain doesn't produce blocks [checklist]
The following checklist should help avoiding the most common reasons why a parachain won't produce blocks. The most common reasons on top, the more advanced trouble further down
Is your parachain ...
- 563
8
votes
Substrate nodes stop producing blocks
The node has 0 peers and as such it refrains from authoring to avoid creating unnecessary forks. You can force a node to author while still having no peers with --force-authoring. Obviously you should ...
- 2,465
7
votes
Accepted
Recovering from stalled finality (babe/grandpa)
The issue lacks details to know exactly what went wrong in the first place (why did finality stop?). That said here are the steps you should have taken in order to debug the problem.
Use the ...
- 2,465
7
votes
Accepted
Is it possible to resurrect babe chains?
We do have the data of the current chain state but we are still bound by the rules that are set in the runtime, one of the current rules is that the BABE pallet assumes that there will be at least one ...
- 2,465
7
votes
Accepted
How to use noteStalled to recover from a finality lagging chain?
You should pass #57281 as the second parameter to the noteStalled call since that is the last block that was finalized, this means that when the GRANDPA validator set is forcibly changed it will ...
- 2,465
5
votes
Accepted
how can I purge all pending extrinsics in the transaction pool
author_removeExtrinsic support remove extrinsic by value
You can also either write a script to calculate the hash, or just read it from polkadot apps under Network -> Node info page
- 826
4
votes
Substrate nodes stop producing blocks
If the two nodes are not on the same local network I suggest you to restart the first node and grab its p2p PeerId.
It should print it during startup phase:
2022-04-06 14:47:07 🏷 Local node identity ...
- 448
3
votes
Equivocation crash (network with ~100 Aura Validators)
There are multiple public identities reported in the log message that you provided.
The node identity Local node identity is: 12D3KooWQbTk1xVSvp8YM3p8uoJrjSa3LKL2UBt11Excd1i11spW that is shown in your ...
- 2,346
3
votes
Accepted
How to set secondary slots for Babe?
The secondary slot authors are the same as the primary slot authors, there's no distinct validator set to configure.
The reason your chain has stalled with "Unexpected epoch change" is ...
- 2,465
2
votes
What does "there are no validators assigned to core" mean?
If you get an error like "there are no validators assigned to core core=CoreIndex(2)", then it could well be that you're running more parachains then there are relay validators available to ...
- 3,899
1
vote
Specific extrinsic stalls the parachain even though the collation is successfully produced
It turns out that an update to polkadot-v0.9.42 of the runtime did solve the issue. It is not clear yet why this resolved the issue. However, this included the change to XCM v3.
- 141
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