The errors "Unclosed client session" and "Unclosed connector" in aiohttp typically occur when a session or connector is not properly closed after use. Here are some best practices and patterns to help resolve and prevent these issues: • Use Managed Sessions: Utilize utilities like

http_context.http_session()

to automatically manage and clean up sessions. For example:

from livekit.agents.utils import http_context

# Get a managed session
session = http_context.http_session()

• Pass Sessions as Parameters: Instead of creating sessions internally, pass them as constructor parameters. This ensures better control and cleanup:

def __init__(self, http_session: aiohttp.ClientSession | None = None):
    self._session = http_session

• Use Session Properties: Implement session properties with fallback to managed sessions:

@property
def session(self) -> aiohttp.ClientSession:
    if not self._session:
        self._session = utils.http_context.http_session()
    return self._session

• Ensure Proper Cleanup: Always close WebSocket connections and sessions in

finally

blocks:

finally:
    if ws is not None:
        await ws.close()

These practices should help address the errors you're encountering. If the issue persists, you may need to review your code for any instances where sessions or connectors are being created but not properly closed. Sources: livekit-plugins/livekit-plugins-lmnt/livekit/plugins/lmnt/tts.py