claude-code - 💡(How to fix) Fix CLI freezes daily: silent TCP drop leaves process in kevent64 with zero API connections (macOS, university network) [1 comments, 2 participants]

TL;DR

Implementing a request timeout or TCP keepalive mechanism can likely resolve the issue of Claude Code CLI freezing due to silently dropped TCP connections.

Guidance

• Investigate the API call ("Cerebrating… 55m 30s") to determine if a request timeout can be implemented to detect and handle dead connections.
• Consider configuring TCP keepalive settings to periodically send probes and detect inactive connections.
• Review the network configuration to understand the dynamics of IP reassignment and NAT entry expiration, which may contribute to the silent dropping of TCP connections.
• Analyze the process sampling data to confirm that the issue is indeed related to idle-waiting for I/O on a dead connection.

Example

No specific code snippet can be provided without more context, but an example of setting a request timeout in a hypothetical API client might look like:

import requests

# Set a timeout of 30 minutes
timeout = 1800
try:
    response = requests.get('https://example.com/api', timeout=timeout)
except requests.Timeout:
    # Handle the timeout exception
    print("Request timed out")

Notes

The effectiveness of the proposed solution depends on the specific implementation details of the Claude Code CLI and its underlying network architecture. Further investigation may be necessary to determine the optimal approach.

Recommendation

Apply a workaround by implementing a request timeout or TCP keepalive mechanism, as this is likely to mitigate the issue of silently dropped TCP connections without requiring a version upgrade.