Kafka RenewDelegationToken Request Wire Format v1 — Binary Protocol Layout

What is RenewDelegationToken?

Token holders call this before expiry to extend the token's lifetime, typically on a renewal thread. If renewal fails (e.g., the broker lost in-memory token state in older Kafka), the client must re-authenticate with primary credentials.

Schema
{
  "Hmac": bytes,
  "RenewPeriodMs": int64
}

Example
{
  "Hmac": "<binary>",
  "RenewPeriodMs": 0
}