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Distributed Transaction: Action on commit prepared or redo prepared failure #16803

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merged 11 commits into from
Sep 24, 2024

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@harshit-gangal harshit-gangal commented Sep 18, 2024

Description

This PR make changes to transaction recovery log state in resource managers.

On a commit prepared failure it checks if the error is retryable or not.
For a non-retryable error, the state is update to FAILED, error metric is updated and then they are are not prepared later.

Same check happens on redo of prepared logs on a failure.

Once, the state is updated to Failed, a user intervention is needed to evaluate the root cause of the issue.
This is a highly unlikely scenario and could have happened due to a bug in the system.

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Checklist

  • Tests were added or are not required
  • Did the new or modified tests pass consistently locally and on CI?
  • Documentation was added or is not required

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@vitess-bot vitess-bot bot added NeedsBackportReason If backport labels have been applied to a PR, a justification is required NeedsDescriptionUpdate The description is not clear or comprehensive enough, and needs work NeedsIssue A linked issue is missing for this Pull Request NeedsWebsiteDocsUpdate What it says labels Sep 18, 2024
@github-actions github-actions bot added this to the v21.0.0 milestone Sep 18, 2024
@harshit-gangal harshit-gangal added Type: Feature Component: Query Serving and removed NeedsWebsiteDocsUpdate What it says NeedsIssue A linked issue is missing for this Pull Request NeedsBackportReason If backport labels have been applied to a PR, a justification is required labels Sep 18, 2024
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codecov bot commented Sep 18, 2024

Codecov Report

Attention: Patch coverage is 96.10390% with 3 lines in your changes missing coverage. Please review.

Project coverage is 69.51%. Comparing base (9563fcb) to head (0dbcc31).
Report is 7 commits behind head on main.

Files with missing lines Patch % Lines
go/vt/vttablet/tabletserver/tx_engine.go 95.52% 3 Missing ⚠️
Additional details and impacted files
@@            Coverage Diff             @@
##             main   #16803      +/-   ##
==========================================
- Coverage   69.52%   69.51%   -0.01%     
==========================================
  Files        1568     1569       +1     
  Lines      202442   202555     +113     
==========================================
+ Hits       140741   140815      +74     
- Misses      61701    61740      +39     

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@harshit-gangal harshit-gangal removed the NeedsDescriptionUpdate The description is not clear or comprehensive enough, and needs work label Sep 19, 2024
for _, preparedTx := range prepared {
var conn *StatefulConnection

txID, _ := dtids.TransactionID(preparedTx.Dtid)
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After talking it over with H - maybe we could solve this by extracting the inside of the loop into a method, and using a defer in that method to check errors

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@GuptaManan100 GuptaManan100 left a comment

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LGTM

Signed-off-by: Harshit Gangal <[email protected]>
@harshit-gangal harshit-gangal merged commit 83b37b8 into vitessio:main Sep 24, 2024
95 checks passed
@harshit-gangal harshit-gangal deleted the tx-recovery-log-state branch September 24, 2024 12:27
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3 participants