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The error message was misleading as it appeared to be an Ollama connectivity issue, but actually occurred during faiss vector database initialization. ## 🔍 Root Cause Analysis The issue was in the faiss vector database serialization logic in `llama_stack/providers/inline/vector_io/faiss/faiss.py`: 1. **Saving**: `faiss.serialize_index()` returns binary data (uint8 numpy array) 2. **Bug**: Code incorrectly used `np.savetxt()` which converts binary to text with scientific notation (e.g., `7.300000000000000000e+01`) 3. **Loading**: `np.loadtxt(buffer, dtype=np.uint8)` failed to parse scientific notation back to uint8 4. **Result**: Server crashed during initialization before reaching Ollama connectivity check ## ✅ Solution Replaced text-based serialization with proper binary serialization: ``` **After (fixed):** ```python # Saving - proper binary format np.save(buffer, np_index, allow_pickle=False) # Loading - proper binary format self.index = faiss.deserialize_index(np.load(buffer, allow_pickle=False)) ``` ## 🧪 Testing - ✅ Binary serialization/deserialization works correctly - ✅ Backward compatible with existing functionality - ✅ No security concerns (allow_pickle=False maintained) - ✅ Resolves the specific ValueError mentioned in the issue ## 📊 Impact This fix resolves: - ValueError during server startup with Ollama templates ## 🔗 Related Issues - Closes #2519 - Affects all users of Ollama template and faiss vector_io configurations ## 📝 Files Changed - `llama_stack/providers/inline/vector_io/faiss/faiss.py` - Fixed serialization methods in `initialize()` and `_save_index()` --------- Signed-off-by: Ben Browning <bbrownin@redhat.com> Co-authored-by: Ben Browning <bbrownin@redhat.com> |
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| faiss | ||
| milvus | ||
| qdrant | ||
| sqlite_vec | ||
| __init__.py | ||