debug_bpy.py

import sys, os, subprocess, traceback

here = os.path.dirname(os.path.abspath(__file__))
proc = subprocess.Popen(
    [sys.executable, os.path.join(here, "bpy_server.py")],
    stdout=subprocess.PIPE,
    stderr=subprocess.PIPE,
    preexec_fn=os.setsid,
)
try:
    stdout, stderr = proc.communicate(timeout=30)
    print(f"bpy_server stdout: {stdout.decode()[:500]}")
    print(f"bpy_server stderr: {stderr.decode()[:500]}")
    print(f"bpy_server returncode: {proc.returncode}")
except subprocess.TimeoutExpired:
    proc.kill()
    stdout, stderr = proc.communicate()
    print(f"bpy_server TIMEOUT - stdout: {stdout.decode()[:500]}")
    print(f"bpy_server TIMEOUT - stderr: {stderr.decode()[:500]}")