[error-handling] Infinite while True loops without timeout

[wody34]

📁 Location

• Files: tests/test_nest_MPI_threading/*.py (3 files)
• Category: error-handling
• Severity: high
• Hashes: 4149d9fe3929, 3c8fe0ea688c, 0330af459e7e

🔍 Problem

MPI communication loops use while True: without timeout protection. If communication fails, these loops block forever.

Affected Files

1. record_region_activity_multiple.py:43
2. input_region_activity_multiple.py:47
3. input_current_region_activity_multiple.py:47

💡 Fix

# Before
while True:
    comm.Recv(...)
    # process

# After
import time
start_time = time.time()
TIMEOUT_SECONDS = 300  # 5 minutes

while time.time() - start_time < TIMEOUT_SECONDS:
    comm.Recv(...)
    # process
else:
    raise TimeoutError(f"MPI communication timeout after {TIMEOUT_SECONDS}s")

🧪 TDD Evidence

Test file: tests/evidence/test_nest_mpi_races.py

• test_infinite_loop_timeout_pattern demonstrates proper timeout handling

tests/evidence/test_nest_mpi_races.py::TestNestMpiRaceConditions::test_infinite_loop_timeout_pattern PASSED

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Run: 2026-02-05-1228 | Auto-generated by UltraQA