generate window post skipped sectors

[aansheng]

Checklist

• This is not a security-related bug/issue. If it is, please follow please follow the security policy.
• This is not a question or a support request. If you have any lotus related questions, please ask in the lotus forum.
• This is not a new feature request. If it is, please file a feature request instead.
• This is not an enhancement request. If it is, please file a improvement suggestion instead.
• I have searched on the issue tracker and the lotus forum, and there is no existing related issue or discussion.
• I am running the Latest release, or the most recent RC(release canadiate) for the upcoming release or the dev branch(master), or have an issue updating to any of these.
• I did not make any code changes to lotus.

Lotus component

• lotus daemon - chain sync
• lotus miner - mining and block production
• lotus miner/worker - sealing
• lotus miner - proving(WindowPoSt)
• lotus miner/market - storage deal
• lotus miner/market - retrieval deal
• lotus miner/market - data transfer
• lotus client
• lotus JSON-RPC API
• lotus message management (mpool)
• Other

Lotus Version

Daemon:  1.12.0-rc1+calibnet+git.41be8fc9e+api1.2.0
Local: lotus-miner version 1.12.0-rc1+calibnet+git.41be8fc9e

Describe the Bug

generate window post skipped sectors

$ lotus-miner proving faults
Miner: t011471
deadline  partition  sectors
0         0          569
0         0          612
0         0          617
0         0          780
0         0          812
$ lotus-miner proving check --only-bad 0
deadline  partition  sector  status

Logging Information

2021-10-11T18:27:26.405Z        WARN    storageminer    storage/wdpost_run.go:697       generate window post skipped sectors    {"sectors": [{"Miner":11471,"Number":569},{"Miner":11471,"Number":612},{"Miner":11471,"Number":617},{"Miner":11471,"Number":780},{"Miner":11471,"Number":812}], "error": "faulty sectors [SectorId(569), SectorId(612), SectorId(617), SectorId(780), SectorId(812)]", "errorVerbose": "faulty sectors [SectorId(569), SectorId(612), SectorId(617), SectorId(780), SectorId(812)]\ngithub.com/filecoin-project/filecoin-ffi.GenerateWindowPoSt\n\t/home/fil/dist/lotus/extern/filecoin-ffi/proofs.go:684\ngithub.com/filecoin-project/lotus/extern/sector-storage/ffiwrapper.(*Sealer).GenerateWindowPoSt\n\t/home/fil/dist/lotus/extern/sector-storage/ffiwrapper/verifier_cgo.go:46\ngithub.com/filecoin-project/lotus/storage.(*WindowPoStScheduler).runPoStCycle\n\t/home/fil/dist/lotus/storage/wdpost_run.go:639\ngithub.com/filecoin-project/lotus/storage.(*WindowPoStScheduler).runGeneratePoST\n\t/home/fil/dist/lotus/storage/wdpost_run.go:103\ngithub.com/filecoin-project/lotus/storage.(*WindowPoStScheduler).startGeneratePoST.func1\n\t/home/fil/dist/lotus/storage/wdpost_run.go:87\nruntime.goexit\n\t/usr/local/go/src/runtime/asm_amd64.s:1371", "try": 0}

### Repo Steps

_No response_

[Reiers]

Hi @anshengme

Thanks for the report. The issue you are experiencing lies elsewhere.

Moving this issue to Lotus Discussions for help and troubleshooting.

Closing Lotus issue ticket.

[LexLuthr]

I am checking with the team what makes windowPost skip a sector.

My current findings are that reason to skip would be if we failed to acquire the sealed sector and cache or either one of them. The aquiresector returns an error when allocate is set, and existing isn't, and the sector exists.

lotus/extern/sector-storage/ffiwrapper/verifier_cgo.go

Line 91 in 207d33e

log.Warnw("failed to acquire FTUpdateCache and FTUpdate of sector, skipping", "sector", sid.ID, "error", err)

I will update this thread when I have more information.

[LexLuthr]

After talking to the team, I can confirm that skip fault happens only due to the above code.
If the necessary files to compute post are either missing or otherwise inaccessible, the sector is skipped and a skip fault is declared.

[LexLuthr]

I am archiving this discussion as there has been no new input from the author for more than 7 days.