# 断流要记录时间点和异常类型，这是排障的第一手证据

print(f"\n[异常 @ {time.time() - start:.2f}s] {type(e).__name__}: {e}")

This code deliberately does three things "a manager should require": the Key comes from environment variables, first-chunk latency and total duration are distinguished, and the timestamp is recorded when an exception occurs. First-chunk latency is the most direct metric of user experience and is recommended for monitoring.

## How to Divide Troubleshooting Duties When Problems Arise

When users report "answers cut off halfway", follow this order, with each step corresponding to a different responsible party:

1. **Check the exception type and when it occurred**: If the exception happened before the first chunk, it's most likely a connection or authentication issue—check the Key and network; if it happened mid-stream, it's a timeout or gateway chain issue.
2. **Verify local timeout configuration**: Are `timeout` and `stream_timeout` shorter than the actual answer duration? For long-answer scenarios, consider loosening the total timeout.
3. **Check the middle layers**: If you're using Nginx, Cloudflare, or a self-built reverse proxy, the default `proxy_read_timeout` is often only 60 seconds—the most common invisible killer. This one absolutely must go into your team's configuration checklist.
4. **Confirm the model's status**: After ruling out the above, check whether the upstream model itself is responding slowly or rate limiting.

Put this checklist in your team wiki, and even new hires can independently handle most broken-stream tickets—this is the idea of turning troubleshooting knowledge into process assets.

## Final Thoughts

Streaming responses and timeout configuration may look like technical details, but they determine two things at the management level: **users' direct experience of the product**, and **the team's response speed when things go wrong**. Spending half a day to set up configuration docs, monitoring, and troubleshooting checklists for this chain is far more cost-effective than firefighting after the fact.

If you haven't registered yet, you can start at https://api.thistoken.ai/register to create an account, get your first streaming chain working in ten minutes with the code above, and then gradually refine your timeout governance process.

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Every example in this post runs with a single API key — get yours at https://api.thistoken.ai/register and start in minutes.