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sqlite: disable WAL mode #18519

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May 9, 2023
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@vrothberg vrothberg commented May 9, 2023

As shown in #17831, WAL mode plays a role in causing database is locked errors. Those errors, in theory, should not happen as the DB should busy wait. mattn/go-sqlite3/issues/274 has some comments indicating that the busy handler behaves differently in WAL mode which may be an explanation to the error.

For now, let's disable WAL mode and only re-enable it when we have clearer understanding of what's going on. The upstream issue along with the SQLite documentation do not give me the clear guidance that I would need.

[NO NEW TESTS NEEDED] - flake is only reproducible in CI.

Fixes: #18356

Does this PR introduce a user-facing change?

None

As shown in containers#17831, WAL mode plays a role in causing `database is locked`
errors.  Those are errors, in theory, should not happen as the DB should
busy wait.  mattn/go-sqlite3/issues/274 has some comments indicating
that the busy handler behaves differently in WAL mode which may be an
explanation to the error.

For now, let's disable WAL mode and only re-enable it when we have
clearer understanding of what's going on.  The upstream issue along with
the SQLite documentation do not give me the clear guidance that I would
need.

[NO NEW TESTS NEEDED] - flake is only reproducible in CI.

Fixes: containers#18356
Signed-off-by: Valentin Rothberg <[email protected]>
@openshift-ci openshift-ci bot added do-not-merge/work-in-progress Indicates that a PR should not merge because it is a work in progress. release-note-none labels May 9, 2023
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openshift-ci bot commented May 9, 2023

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: vrothberg

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@openshift-ci openshift-ci bot added the approved Indicates a PR has been approved by an approver from all required OWNERS files. label May 9, 2023
@vrothberg vrothberg marked this pull request as ready for review May 9, 2023 13:56
@openshift-ci openshift-ci bot removed the do-not-merge/work-in-progress Indicates that a PR should not merge because it is a work in progress. label May 9, 2023
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@mheon @edsantiago PTAL

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LGTM. I think my CI run count is in the forties by now, and I still haven't seen "db is locked" with WAL disabled.

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mheon commented May 9, 2023

/lgtm
/hold

@openshift-ci openshift-ci bot added do-not-merge/hold Indicates that a PR should not merge because someone has issued a /hold command. lgtm Indicates that a PR is ready to be merged. labels May 9, 2023
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/hold cancel

@openshift-ci openshift-ci bot removed the do-not-merge/hold Indicates that a PR should not merge because someone has issued a /hold command. label May 9, 2023
@openshift-merge-robot openshift-merge-robot merged commit 6613e50 into containers:main May 9, 2023
@github-actions github-actions bot added the locked - please file new issue/PR Assist humans wanting to comment on an old issue or PR with locked comments. label Aug 24, 2023
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sqlite: Error: beginning transaction: database is locked
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