[GRANDPA] Encountered consensus error: ClientImport, Wasmi, Unreachable

[boozook]

Issue related to #2729 & #2738.

Still reproducible on commits 46121f... & 9687db....

2019-06-10 13:03:42 Roles: AUTHORITY
2019-06-10 13:03:42 Highest known block at #0
2019-06-10 13:03:42 Local node identity is: QmZraTM5UodUsarLmX8ytPE7DrujvuYNALNQ2PHc32LwNa
2019-06-10 13:03:42 Using authority key 5EJEZLV9...
2019-06-10 13:03:46 Discovered new external address for our node: /ip4/157.230.35.215/tcp/30333/p2p/QmZraTM5UodUsarLmX8ytPE7DrujvuYNALNQ2PHc32LwNa
2019-06-10 13:03:47 Idle (1 peers), best: #0 (0x5f63…0017), finalized #0 (0x5f63…0017), ⬇ 1.3kiB/s ⬆ 1.3kiB/s
2019-06-10 13:03:50 Starting consensus session on top of parent 0x5f635d58e1ab95577205e48b64a046541ba36ac8458fb13d9e31c97595290017
/fzzr/akropolis-c2fc-node/runtime/src/lib.rs
242
1
2019-06-10 13:03:50 Encountered consensus error: ClientImport("Error(Inner(Execution(Wasmi(Trap(Trap { kind: Unreachable })))))")
2019-06-10 13:03:50 Authorship task terminated unexpectedly. Restarting
2019-06-10 13:03:52 Idle (1 peers), best: #0 (0x5f63…0017), finalized #0 (0x5f63…0017), ⬇ 55 B/s ⬆ 73 B/s
2019-06-10 13:03:57 Idle (1 peers), best: #0 (0x5f63…0017), finalized #0 (0x5f63…0017), ⬇ 0 ⬆ 0
2019-06-10 13:04:02 Idle (1 peers), best: #0 (0x5f63…0017), finalized #0 (0x5f63…0017), ⬇ 38 B/s ⬆ 0.1kiB/s
2019-06-10 13:04:07 Idle (1 peers), best: #0 (0x5f63…0017), finalized #0 (0x5f63…0017), ⬇ 0.1kiB/s ⬆ 78 B/s
2019-06-10 13:04:12 Idle (1 peers), best: #0 (0x5f63…0017), finalized #0 (0x5f63…0017), ⬇ 0 ⬆ 0
2019-06-10 13:04:17 Idle (1 peers), best: #0 (0x5f63…0017), finalized #0 (0x5f63…0017), ⬇ 37 B/s ⬆ 73 B/s
2019-06-10 13:04:20 Starting consensus session on top of parent 0x5f635d58e1ab95577205e48b64a046541ba36ac8458fb13d9e31c97595290017
/fzzr/akropolis-c2fc-node/runtime/src/lib.rs
242
1
2019-06-10 13:04:20 Encountered consensus error: ClientImport("Error(Inner(Execution(Wasmi(Trap(Trap { kind: Unreachable })))))")
2019-06-10 13:04:20 Authorship task terminated unexpectedly. Restarting
2019-06-10 13:04:22 Idle (1 peers), best: #0 (0x5f63…0017), finalized #0 (0x5f63…0017), ⬇ 0.1kiB/s ⬆ 0.1kiB/s

The error in log pointing to construct_runtime! macro.

[boozook]

Workaround - simply turn off grandpa with arg --no-grandpa. Not a workaround really.

[rphmeier]

https://github.com/akropolisio/akropolis-polkadot/blob/master/src/chain_spec.rs#L196 , you're starting with zero grandpa voters, which might cause something like this.

[boozook]

Sorry, I'v mentioned commit previously. GRANDPA is configured with three keys.
Just same as there in Polka.