Restore-DbaDbSnapshot - Add retry logic for deadlock errors#9900
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potatoqualitee merged 2 commits intodevelopmentfrom Nov 1, 2025
Merged
Restore-DbaDbSnapshot - Add retry logic for deadlock errors#9900potatoqualitee merged 2 commits intodevelopmentfrom
potatoqualitee merged 2 commits intodevelopmentfrom
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This fixes issue #9233 where Restore-DbaDbSnapshot occasionally fails with deadlock errors when restoring multiple databases in parallel. The deadlock occurs when: 1. One process executes RESTORE DATABASE (holds locks on master) 2. Another process calls Get-DbaDbSnapshot (queries system tables in master) The fix implements retry logic with exponential backoff: - Detects deadlock errors (SQL error 1205) - Retries up to 3 times with 2^n second delays (2s, 4s, 8s) - Logs retry attempts at verbose level - Preserves original error handling for non-deadlock errors Co-authored-by: Chrissy LeMaire <potatoqualitee@users.noreply.github.com>
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This fixes issue #9233 where Restore-DbaDbSnapshot occasionally fails with deadlock errors when restoring multiple databases in parallel.
Root Cause
The deadlock occurs when:
Solution
Implemented retry logic with exponential backoff:
Fixes #9233
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