Preventing Temporary Table Race Conditions and Namespace Pollution in Concurrent Batch Architectures

Description and use

The article presents a verification approach for race conditions and namespace pollution when concurrent workers use temporary tables in SQLite. Dynamic table naming and isolated namespaces eliminate collisions, unlike the anti‑pattern with a fixed name.

Problem

Concurrent batch workers using hardcoded temporary table names cause race conditions, namespace collisions, and data corruption.

Outcome

The verification harness demonstrates that dynamic naming with isolated namespaces prevents race conditions and namespace pollution, whereas the anti‑pattern leads to deterministic failures.

Workflow

• Define a BatchTaskConfig schema with task_id, use_dynamic_naming, and payload_data.
• Implement run_batch_simulation to create a temporary table name based on task_id when use_dynamic_naming is true.
• Spawn multiple threads, each executing run_batch_simulation against a shared or private SQLite URI.
• Collect SimulationResult objects recording thread_name, table_name, success flag, error_message, and execution_time_sec.
• Aggregate results into a VerificationReport and serialize with orjson.
• Run the harness in a CI/CD pipeline to detect conflicts.

Evidence

When executing the benchmark harness, the script terminated instantaneously with a ModuleNotFoundError: No module named 'orjson'

Source

Forced unconditional import of orjson was declared at the top‑level module scope without guards.

Source

The script had a brittle hard dependency on non‑standard packages.

Source