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Add macOS fork safety check for Gunicorn multi-worker mode #2360

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Merged
danielaskdd merged 1 commit into from
Nov 14, 2025
+33 −0
Merged

Add macOS fork safety check for Gunicorn multi-worker mode #2360

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33 changes: 33 additions & 0 deletions lightrag/api/run_with_gunicorn.py
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Original file line number Diff line number Diff line change
Expand Up @@ -76,6 +76,39 @@ def main():
print("=" * 80 + "\n")
sys.exit(1)

# Check macOS fork safety environment variable for multi-worker mode
if (
platform.system() == "Darwin"
and global_args.workers > 1
and os.environ.get("OBJC_DISABLE_INITIALIZE_FORK_SAFETY") != "YES"
):
print("\n" + "=" * 80)
print("❌ ERROR: Missing required environment variable on macOS!")
print("=" * 80)
print("\nmacOS with Gunicorn multi-worker mode requires:")
print(" OBJC_DISABLE_INITIALIZE_FORK_SAFETY=YES")
print("\nReason:")
print(" NumPy uses macOS's Accelerate framework (Objective-C based) for")
print(" vector computations. The Objective-C runtime has fork safety checks")
print(" that will crash worker processes when embedding functions are called.")
print("\nCurrent configuration:")
print(" - Operating System: macOS (Darwin)")
print(f" - Workers: {global_args.workers}")
print(
f" - Environment Variable: {os.environ.get('OBJC_DISABLE_INITIALIZE_FORK_SAFETY', 'NOT SET')}"
)
print("\nHow to fix:")
print(" Option 1 - Set environment variable before starting (recommended):")
print(" export OBJC_DISABLE_INITIALIZE_FORK_SAFETY=YES")
print(" lightrag-server")
print("\n Option 2 - Add to your shell profile (~/.zshrc or ~/.bash_profile):")
print(" echo 'export OBJC_DISABLE_INITIALIZE_FORK_SAFETY=YES' >> ~/.zshrc")
print(" source ~/.zshrc")
print("\n Option 3 - Use single worker mode (no multiprocessing):")
print(" lightrag-server --workers 1")
print("=" * 80 + "\n")
sys.exit(1)

# Check and install dependencies
check_and_install_dependencies()

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