Reporting an Incident to the Team

7/8/2026intermediate

Speakers

You

あなた

Ingrid

シニアAIエンジニア(スウェーデン)

この場面について

本番環境の障害(インシデント)が起きた直後、海外のAIエンジニアの同僚に状況を報告し、対応方針を相談する場面

Summary (JP)

深夜にモデルAPIのレイテンシが急上昇し、一部のリクエストがタイムアウトするインシデントが発生します。あなたはスウェーデン出身のシニアAIエンジニア、Ingridに状況を報告し、影響範囲や暫定対応(ロールバックやスケーリング)について相談します。最後に、恒久対応をポストモーテムで検討することを確認して会話が終わります。

会話

Speed:

文をクリックすると、その部分から読み上げが始まります。

You:

Hey Ingrid, sorry to ping you so late, but we have an issue.

Ingrid:

No worries, I'm on call anyway. What's going on?

You:

We're seeing a big spike in latency on the model API. Some requests are hitting a timeout.

Ingrid:

How bad is it? Are all users affected, or just some?

You:

Looks like about thirty percent of requests are timing out right now.

Ingrid:

Okay, let's mitigate first and figure out the root cause later. Can we scale up the inference servers?

You:

I can do that right now. Give me a couple of minutes.

Ingrid:

Thanks. Also, did we deploy anything new in the last few hours?

You:

Actually yes, we pushed the new model version around 9 PM.

Ingrid:

That's probably it. The new model might be heavier than our current servers can handle.

You:

That makes sense. Should we just roll back to the old version?

Ingrid:

Yes, let's roll back for now. We can retry the new model once we've scaled up properly.

You:

Got it. I'll roll it back and keep monitoring the latency.

Ingrid:

Perfect. Let's schedule a postmortem tomorrow morning to dig into the root cause properly.

You:

Sounds good. Thanks for jumping on this so quickly, Ingrid.

Ingrid:

Anytime. Let's get this fixed.

Vocabulary

spike

Meaning: 急上昇、急激な増加

Example: We saw a sudden spike in error rates.

timeout

Meaning: タイムアウト(応答待ちの時間切れ)

Example: Some requests are hitting a timeout after ten seconds.

roll back

Meaning: (変更やデプロイを)以前の状態に戻す

Example: Let's roll back to the previous version.

mitigate

Meaning: (問題や被害を)軽減する、緩和する

Example: We need to mitigate the impact before we dig into the root cause.

root cause

Meaning: 根本原因

Example: We still don't know the root cause of the memory leak.

postmortem

Meaning: 事後検証、ポストモーテム(障害後の振り返り)

Example: We'll schedule a postmortem meeting for tomorrow.

scale up

Meaning: (リソースなどを)増強する、スケールアップする

Example: Can we scale up the inference servers temporarily?

on call

Meaning: オンコール(緊急対応の当番)

Example: Who's on call tonight?

Quiz

1. What problem did You first notice?

2. What did Ingrid suggest as an immediate step?

3. What caused the latency spike, according to the conversation?

4. What did they decide to do about the deployment?

5. What will happen after the incident is resolved?

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