<h1>Database Sync Incident Report: SQLITE_BUSY - sqlite locked</h1>
<p>An authentic database error context has been detected in the TenantFlow distributed local-to-cloud synchronization lane. Below is the operational detail for this state.</p>
<h2>Error Context Specifications</h2>
<ul>
<li><strong>Error Code:</strong> <code>SQLITE_BUSY-1036</code></li>
<li><strong>System Component:</strong> <code>SQLite Locking</code></li>
<li><strong>Status Severity:</strong> <code>CRITICAL</code></li>
</ul>
<h2>Incident Description</h2>
<p>Database file lock due to concurrent read-write contention.</p>
<h3>Synchronization Failure Lane Analysis</h3>
<p>Raised when the SQLite database is locked by another thread attempting to record intercept mutations into the MutationBuffer queue.</p>
<h2>Diagnostic &amp; Recovery Strategy</h2>
<ol>
<li><strong>Diagnosis:</strong> Run <code>dotnet test</code> or query the local <code>device_sync_state</code> log to inspect current LSN progression numbers.</li>
<li><strong>Mitigation:</strong> Configure SQLite to use Write-Ahead Logging (WAL) mode and enable connection pooling with shared cache.</li>
<li><strong>Validation:</strong> Monitor telemetry streams (if telemetry tracking is bypassed, verify loopback proxy logs) to verify self-healing recovery takes under 9.0 seconds.</li>
</ol>
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