Write-ahead log coverage gap for SonarQube retry operations

The goal is to determine whether SonarQube retry mechanisms for database writes can be safely repeated without duplicating persistent records, given the interaction between Hibernate session-level caching and the platform's limited write-ahead log coverage. SonarQube 9.x introduced a write-ahead log for certain operations, but its scope does not encompass all task-execution write paths. Hibernate's session cache may re-issue entities on retry if the session is not invalidated, and the task execution model's attempt-ID logging does not inherently guarantee idempotent primary-key writes. Additionally, Elasticsearch index updates are not transactional with database writes, leading to eventual consistency discrepancies when retries occur. Version-specific Hibernate JTA platform settings can further modulate these behaviors, and no native idempotent write guard exists across the platform.

• What conditions cause the write-ahead log to omit retry-affected operations?
• Whether the task execution attempt ID prevents duplicate primary-key writes across clustered SonarQube nodes?
• If Elasticsearch index reconciliation can diverge from retried database transactions?