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lock: introduce short delay between failed locking retries#5012

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MichaelEischer merged 1 commit intorestic:masterfrom
MichaelEischer:fix-lock-retries
Aug 26, 2024
Merged

lock: introduce short delay between failed locking retries#5012
MichaelEischer merged 1 commit intorestic:masterfrom
MichaelEischer:fix-lock-retries

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@MichaelEischer MichaelEischer commented Aug 23, 2024

What does this PR change? What problem does it solve?

Failed locking attempts were immediately retried up to three times
without any delay between the retries. If a lock file is not found while
checking for other locks, with the reworked backend retries there is no
delay between those retries. This is a problem if a backend requires a
few seconds to reflect file deletions in the file listings. To work
around this problem, introduce a short exponentially increasing delay
between the retries. The number of retries is now increased to 4. This
results in delays of 5, 10 and 20 seconds between the retries.

Includes #5011

Was the change previously discussed in an issue or on the forum?

Fixes #5005

Checklist

  • I have read the contribution guidelines.
  • I have enabled maintainer edits.
  • I have added tests for all code changes.
  • [ ] I have added documentation for relevant changes (in the manual).
  • There's a new file in changelog/unreleased/ that describes the changes for our users (see template).
  • I have run gofmt on the code in all commits.
  • All commit messages are formatted in the same style as the other commits in the repo.
  • I'm done! This pull request is ready for review.

Failed locking attempts were immediately retried up to three times
without any delay between the retries. If a lock file is not found while
checking for other locks, with the reworked backend retries there is no
delay between those retries. This is a problem if a backend requires a
few seconds to reflect file deletions in the file listings. To work
around this problem, introduce a short exponentially increasing delay
between the retries. The number of retries is now increased to 4. This
results in delays of 5, 10 and 20 seconds between the retries.
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LGTM.

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Successfully merging this pull request may close these issues.

Intermittent - unable to create lock in backend: circuit breaker open for file <lock/XXXXXXXXXX>

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