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Chain reorg on every block during sync

See original GitHub issue

Description

Teku is printing a chain reorg on every imported block during sync:


2020-09-10 08:03:17.747 | beaconchain-async-7       | INFO  | RecentChainData                | Chain reorg from ebe498..660c (261915) to 4f042e..da16 (261915). Common ancestor at slot 0
2020-09-10 08:03:17.817 | beaconchain-async-8       | INFO  | RecentChainData                | Chain reorg from 4f042e..da16 (261915) to 21dd54..ddab (261915). Common ancestor at slot 1
2020-09-10 08:03:17.887 | beaconchain-async-7       | INFO  | RecentChainData                | Chain reorg from 21dd54..ddab (261915) to 35b622..1cad (261915). Common ancestor at slot 3
2020-09-10 08:03:17.956 | beaconchain-async-10      | INFO  | RecentChainData                | Chain reorg from 35b622..1cad (261915) to a24292..d7f7 (261915). Common ancestor at slot 4
2020-09-10 08:03:18.011 | beaconchain-async-1       | INFO  | RecentChainData                | Chain reorg from a24292..d7f7 (261915) to d346e6..10cb (261915). Common ancestor at slot 5
2020-09-10 08:03:18.055 | beaconchain-async-9       | INFO  | RecentChainData                | Chain reorg from d346e6..10cb (261915) to 3f1b68..2ce1 (261915). Common ancestor at slot 6
2020-09-10 08:03:18.079 | beaconchain-async-11      | INFO  | RecentChainData                | Chain reorg from 3f1b68..2ce1 (261915) to 76262e..fc76 (261915). Common ancestor at slot 7
2020-09-10 08:03:18.194 | beaconchain-async-3       | INFO  | RecentChainData                | Chain reorg from 76262e..fc76 (261915) to 6f88ad..ebbd (261915). Common ancestor at slot 8
2020-09-10 08:03:18.267 | beaconchain-async-2       | INFO  | RecentChainData                | Chain reorg from 6f88ad..ebbd (261915) to 9a2fef..4eaf (261915). Common ancestor at slot 9
2020-09-10 08:03:18.371 | beaconchain-async-4       | INFO  | RecentChainData                | Chain reorg from 9a2fef..4eaf (261915) to 97b939..f54c (261915). Common ancestor at slot 10
2020-09-10 08:03:18.455 | beaconchain-async-6       | INFO  | RecentChainData                | Chain reorg from 97b939..f54c (261915) to 8f1817..371a (261915). Common ancestor at slot 11
2020-09-10 08:03:18.541 | beaconchain-async-9       | INFO  | RecentChainData                | Chain reorg from 8f1817..371a (261915) to eca78a..1a22 (261915). Common ancestor at slot 12

We need to find a way to be smarter about this.

Issue Analytics

State:
Created 3 years ago
Comments:13 (13 by maintainers)

Top GitHub Comments

1reaction

Nashatyrevcommented, Sep 10, 2020

Oh, or do we always have state slot == block slot in the ChainHead ?

1reaction

ajsuttoncommented, Sep 10, 2020

Yeah there’s a couple - https://github.com/PegaSysEng/teku/pull/2769 is the key one but fixes an important bug where we missed reorgs and so wound up not recalculating validator duties when we should have. #2637 is what started it but significantly improves attestation inclusion rates.

https://github.com/PegaSysEng/teku/pull/2670 would fix it but is a bit heavy handed and would lead to attestations that point to and old head in some cases. Not a bad option as a quick fix though.