What are common ChromaDB errors and how do you handle them in production code?

import chromadb
from chromadb.errors import (
    InvalidCollectionException,
    IDAlreadyExistsError,
    InvalidDimensionException,
)

client = chromadb.PersistentClient(path="./error_demo")

# --- Error 1: Collection not found ---
try:
    col = client.get_collection("does_not_exist")
except InvalidCollectionException as e:
    print(f"Collection missing: {e}")
    col = client.create_collection("does_not_exist")  # create it

# --- Error 2: Duplicate ID ---
col.add(documents=["Original doc"], ids=["doc-1"])
try:
    col.add(documents=["Duplicate doc"], ids=["doc-1"])
except IDAlreadyExistsError:
    print("ID already exists — use upsert() instead")
    col.upsert(documents=["Updated doc"], ids=["doc-1"])  # safe

# --- Error 3: Dimension mismatch ---
# Occurs when pre-computed embeddings don't match collection's embedding dimensions
col2 = client.create_collection("fixed_dim")
col2.add(embeddings=[[0.1, 0.2, 0.3]], documents=["Doc"], ids=["x"])
try:
    col2.add(embeddings=[[0.1, 0.2]], documents=["Wrong dim"], ids=["y"])  # 2-dim
except InvalidDimensionException as e:
    print(f"Dimension mismatch: {e}")

# --- Error 4: Connection error (HttpClient) ---
try:
    remote = chromadb.HttpClient(host="bad-host", port=9999)
    remote.heartbeat()
except Exception as e:
    print(f"Server unreachable: {e}")

# --- Production pattern: retry wrapper ---
import time
from functools import wraps

def with_retry(max_attempts=3, delay=1.0):
    def decorator(fn):
        @wraps(fn)
        def wrapper(*args, **kwargs):
            for attempt in range(max_attempts):
                try:
                    return fn(*args, **kwargs)
                except Exception as e:
                    if attempt == max_attempts - 1:
                        raise
                    print(f"Attempt {attempt+1} failed: {e}. Retrying...")
                    time.sleep(delay * (attempt + 1))
        return wrapper
    return decorator

@with_retry(max_attempts=3)
def safe_add(collection, documents, ids):
    collection.upsert(documents=documents, ids=ids)