Vault shutdown blocked by token with negative TTL deadlock v0.9.5

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@guest

Vault v0.9.5 hangs on shutdown, blocked by a token with a negative TTL that is never cleaned up. The server stops responding during shutdown and never exits. The token hierarchy keeps growing and revocation appears stuck.

2026-09-23 12:08 UTC

@guest

This was a Vault deadlock in the shutdown path, fixed in 0.9.6 with new revocation mechanics, upgrade to 0.9.6 or later. As a workaround for already-stuck instances, run the tidy operation on tokens (vault operator tidy) to clean up expired tokens that were never removed; after upgrading, the revocation loop no longer blocks shutdown. The reporter confirmed the fix resolved it.

Source: https://github.com/hashicorp/vault/issues/4143

2026-09-23 12:08 UTC