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fix committee assignment bugs #699

Merged
merged 3 commits into from
Mar 3, 2019
Merged

fix committee assignment bugs #699

merged 3 commits into from
Mar 3, 2019

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djrtwo
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@djrtwo djrtwo commented Feb 27, 2019 •
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2 bugs:

  • We were modifying current_shuffling_epoch and then calling get_current_epoch_committee_count expecting that it was still getting the committee count from the previous value of current_shuffling_epoch. Switch operations to prevent this error
  • when getting next epoch committee assignments, we were sometimes modifying committees_per_epoch and shuffling_epoch when these things should have remained constant.

@djrtwo djrtwo added the general:bug Something isn't working label Feb 27, 2019
@djrtwo djrtwo requested review from JustinDrake and hwwhww and removed request for JustinDrake February 27, 2019 18:37
@djrtwo djrtwo changed the title fix committee start shard bug fix committee assignment bugs Feb 27, 2019
@terencechain terencechain mentioned this pull request Feb 27, 2019
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At this point get_crosslink_committees_at_slot is black magic to me. I wish it could somehow be massively simplified, similar to how we massively simplified the validator state machine (which had a bunch of subtle bugs, and was brittle).

hwwhww added a commit to hwwhww/trinity that referenced this pull request Feb 28, 2019
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Sync with ethereum/consensus-specs#699
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@hwwhww hwwhww mentioned this pull request Feb 28, 2019
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djrtwo commented Mar 1, 2019

These fixes are pretty critical. Let's get it merged and try to simplify after

@terencechain
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At this point get_crosslink_committees_at_slot is black magic to me. I wish it could somehow be massively simplified, similar to how we massively simplified the validator state machine (which had a bunch of subtle bugs, and was brittle).

Can confirm, whenever there's a validator run time failure we immediately look at this function then begin to scratch our head 😆

@JustinDrake JustinDrake self-requested a review March 1, 2019 07:13
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Let's get it merged

Approved!

hwwhww
hwwhww approved these changes Mar 2, 2019
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LGTM!
Trinity side sync + refactoring: ethereum/trinity#334

@djrtwo djrtwo merged commit 146aef3 into dev Mar 3, 2019
@djrtwo djrtwo deleted the start_shard_bug branch March 3, 2019 23:54
hwwhww added a commit to ethereum/trinity that referenced this pull request Mar 4, 2019
@hwwhww
Sync with ethereum/consensus-specs#699: fix committee assignment bugs (…
9a29acf 
…#334)

* Sync with ethereum/consensus-specs#699

* Refactor `get_crosslink_committees_at_slot` with `ShufflingContext`

* Fix typo

* Sections
@akhila-raju akhila-raju mentioned this pull request Mar 15, 2019
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@hwwhww hwwhww hwwhww approved these changes

@JustinDrake JustinDrake JustinDrake approved these changes

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@djrtwo @JustinDrake @terencechain @hwwhww