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DAOS-16702 rebuild: restart rebuild for a massive failure case #15343

Merged
merged 4 commits into from
Oct 29, 2024
Merged

DAOS-16702 rebuild: restart rebuild for a massive failure case #15343

merged 4 commits into from
Oct 29, 2024

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liuxuezhao
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In special massive failure case -

  1. some engines down and triggered rebuild.
  2. one engine participated the rebuild, not finished yet, it down again, the #failures exceeds pool RF and will not change pool map.
  3. That engine restarted by administrator.

In that case should recover the rebuild task on the engine, to simplify it now just abort and retry the global rebuild task.
No such issue by the typical recover approach that restart the whole system including the PS leader.

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github-actions bot commented Oct 18, 2024 •
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Ticket title is 'Rebuilding cannot be completed after restarting ranks in cases of massive failures.'
Status is 'In Progress'
https://daosio.atlassian.net/browse/DAOS-16702

@liuxuezhao liuxuezhao marked this pull request as ready for review October 18, 2024 10:55
@liuxuezhao liuxuezhao requested review from a team as code owners October 18, 2024 10:55
@liuxuezhao liuxuezhao removed request for a team October 18, 2024 10:55
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Test stage Functional Hardware Medium Verbs Provider completed with status FAILURE. https://build.hpdd.intel.com//job/daos-stack/job/daos/view/change-requests/job/PR-15343/2/execution/node/1397/log

@liuxuezhao liuxuezhao requested a review from liw October 21, 2024 01:03
liw
liw requested changes Oct 21, 2024
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src/pool/srv_pool.c Outdated Show resolved Hide resolved
@liuxuezhao liuxuezhao requested a review from liw October 21, 2024 01:57
liw
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@liuxuezhao liuxuezhao requested a review from liw October 21, 2024 02:07
liw
liw previously approved these changes Oct 21, 2024
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wangshilong
wangshilong reviewed Oct 21, 2024
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I run test locally, somehow rebuild finished but with 2007 errors, and retry forever.

@liuxuezhao
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I run test locally, somehow rebuild finished but with 2007 errors, and retry forever.

at my side I tested DER_STALE will retry and finish. I'll check details with you offline

@wangshilong
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I run test locally, somehow rebuild finished but with 2007 errors, and retry forever.

at my side I tested DER_STALE will retry and finish. I'll check details with you offline

See logs here:

https://build.hpdd.intel.com/job/daos-stack/job/daos/job/PR-15354/1/artifact/Functional%20on%20EL%208.8/control/dmg_pool_query_ranks.py/job.log/*view*/

dmg pool query timeout after restarting rank, but rebuild did not finish too.

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https://build.hpdd.intel.com/job/daos-stack/job/daos/job/PR-15354/1/artifact/Functional%20on%20EL%208.8/control/dmg_pool_query_ranks.py/job.log/*view*/

dmg pool query timeout after restarting rank, but rebuild did not finish too.

I ran several test on wolf wit similar steps and be able to reproduce a rebuild timeout issue.
The problem is the ALIVE event got from CRT_EVS_GRPMOD rather than CRT_EVS_SWIM, so cannot ignore CRT_EVS_GRPMOD event.
I changed handle_event a little bit @liw please check if it is good for you.
@wangshilong please retest with the new version. thx

@liuxuezhao liuxuezhao requested review from liw and wangshilong October 23, 2024 01:13
@liuxuezhao
DAOS-16702 rebuild: restart rebuild for a massive failure case
0b2e1fa 
In special massive failure case -
1. some engines down and triggered rebuild.
2. one engine participated the rebuild, not finished yet, it down again,
   the #failures exceeds pool RF and will not change pool map.
3. That engine restarted by administrator.

In that case should recover the rebuild task on the engine, to simplify it now just
abort and retry the global rebuild task.
No such issue by the typical recover approach that restart the whole
system including the PS leader.
Skip-nlt: true

Signed-off-by: Xuezhao Liu <[email protected]>
@liuxuezhao
DAOS-16702 rebuild: address comment
b99edd8 
Skip-nlt: true
Signed-off-by: Xuezhao Liu <[email protected]>
@liuxuezhao
DAOS-16702 rebuild: CRT_EVT_ALIVE possibly from CRT_EVS_GRPMOD
1d2de7d 
refine handle_event.
Skip-nlt: true

Signed-off-by: Xuezhao Liu <[email protected]>
@liuxuezhao
DAOS-16702 rebuild: start new rpt for new rebuild_gen
6e5935d 
Skip-nlt: true

Signed-off-by: Xuezhao Liu <[email protected]>
@liuxuezhao
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pushed a new commit to resolve a race condition of rpt not stoped intime when restart new rebuild.

wangshilong
wangshilong approved these changes Oct 25, 2024
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Thanks for fix.

@liuxuezhao liuxuezhao requested review from a team and gnailzenh October 25, 2024 08:11
@gnailzenh gnailzenh merged commit 50128bd into master Oct 29, 2024
53 of 54 checks passed
@gnailzenh gnailzenh deleted the lxz/massive_rb branch October 29, 2024 15:30
@mjmac mjmac mentioned this pull request Nov 13, 2024
Closed
jolivier23 pushed a commit that referenced this pull request Dec 11, 2024
@liuxuezhao @jolivier23
DAOS-16702 rebuild: restart rebuild for a massive failure case (#15343)
5f29cc5 
* DAOS-16702 rebuild: restart rebuild for a massive failure case

In special massive failure case -
1. some engines down and triggered rebuild.
2. one engine participated the rebuild, not finished yet, it down again,
   the #failures exceeds pool RF and will not change pool map.
3. That engine restarted by administrator.

In that case should recover the rebuild task on the engine, to simplify it now just
abort and retry the global rebuild task.
No such issue by the typical recover approach that restart the whole
system including the PS leader.

Signed-off-by: Xuezhao Liu <[email protected]>
jolivier23 pushed a commit that referenced this pull request Dec 11, 2024
@liuxuezhao @jolivier23
DAOS-16702 rebuild: restart rebuild for a massive failure case (#15343)
f945f17 
* DAOS-16702 rebuild: restart rebuild for a massive failure case

In special massive failure case -
1. some engines down and triggered rebuild.
2. one engine participated the rebuild, not finished yet, it down again,
   the #failures exceeds pool RF and will not change pool map.
3. That engine restarted by administrator.

In that case should recover the rebuild task on the engine, to simplify it now just
abort and retry the global rebuild task.
No such issue by the typical recover approach that restart the whole
system including the PS leader.

Signed-off-by: Xuezhao Liu <[email protected]>
@mjmac mjmac mentioned this pull request Dec 12, 2024
Merged
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@wangshilong wangshilong wangshilong approved these changes

@liw liw liw approved these changes

@wangdi1 wangdi1 Awaiting requested review from wangdi1

@gnailzenh gnailzenh Awaiting requested review from gnailzenh

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@liuxuezhao @daosbuild1 @wangshilong @liw @gnailzenh