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tarantool-etcd-hzu Watch on a future revision gets progress notifies below start_revision
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| Created by | Eugene Blikh |
| Owner | bigbes@gmail.com |
| Created | 2026-07-17T13:20:14Z |
| Updated | 2026-07-17T13:20:14Z |
etcd suppresses progress notifications for a watcher whose start_revision is ahead of the current revision — watchable_store.go:524, 'if rev < w.startRev { return false }' (PR #20286, 3.6).
We emit the CURRENT header unconditionally on both the periodic path and ProgressRequest (app/etcd/grpc.lua:394-402, grpc.lua:522-533, app/etcd/json.lua:289-298). The wire layers do not even retain start_revision on the watcher handle, so the check cannot be made where the notify is sent.
Impact: a client watching from a future revision sees header.revision values below the revision it asked to start at, which breaks the 'progress notify means I am caught up to here' contract.
A watcher created with start_revision > current gets no progress notify until the store reaches that revision; both wires; test pins it.
No outgoing dependencies.
Nothing depends on this issue.
| id | tarantool-etcd-hzu |
| content_hash | 14fdd6958ceed40cb4c8fba54490d15898bbb96373552fcfcf59575bef43a86f |
| title | Watch on a future revision gets progress notifies below start_revision |
| description | etcd suppresses progress notifications for a watcher whose start_revision is ahead of the current revision — watchable_store.go:524, 'if rev < w.startRev { return false }' (PR #20286, 3.6). We emit the CURRENT header unconditionally on both the periodic path and ProgressRequest (app/etcd/grpc.lua:394-402, grpc.lua:522-533, app/etcd/json.lua:289-298). The wire layers do not even retain start_revision on the watcher handle, so the check cannot be made where the notify is sent. Impact: a client watching from a future revision sees header.revision values below the revision it asked to start at, which breaks the 'progress notify means I am caught up to here' contract. |
| design | |
| acceptance_criteria | A watcher created with start_revision > current gets no progress notify until the store reaches that revision; both wires; test pins it. |
| notes | |
| status | open |
| priority | 2 |
| issue_type | bug |
| assignee | NULL |
| estimated_minutes | NULL |
| created_at | 2026-07-17T13:20:14Z |
| created_by | Eugene Blikh |
| owner | bigbes@gmail.com |
| updated_at | 2026-07-17T13:20:14Z |
| closed_at | NULL |
| closed_by_session | |
| external_ref | NULL |
| spec_id | |
| compaction_level | 0 |
| compacted_at | NULL |
| compacted_at_commit | NULL |
| original_size | NULL |
| sender | |
| ephemeral | 0 |
| wisp_type | |
| pinned | 0 |
| is_template | 0 |
| mol_type | |
| work_type | |
| source_system | |
| metadata | <binary> |
| source_repo | |
| close_reason | |
| event_kind | |
| actor | |
| target | |
| payload | |
| await_type | |
| await_id | |
| timeout_ns | 0 |
| waiters | |
| hook_bead | |
| role_bead | |
| agent_state | |
| last_activity | NULL |
| role_type | |
| rig | |
| due_at | NULL |
| defer_until | NULL |
| no_history | 0 |
| started_at | NULL |
| is_blocked | 0 |
| issue_id | tarantool-etcd-hzu |
| label | etcd-changelog-sweep |
| id | 019f703c-189d-7445-a7d9-48e66184cde8 |
| issue_id | tarantool-etcd-hzu |
| event_type | created |
| actor | Eugene Blikh |
| old_value | |
| new_value | |
| comment | NULL |
| created_at | 2026-07-17T16:20:14Z |
| id | 019f703c-189d-7a9a-9135-8d91cbf26dc1 |
| issue_id | tarantool-etcd-hzu |
| event_type | label_added |
| actor | Eugene Blikh |
| old_value | NULL |
| new_value | NULL |
| comment | Added label: etcd-changelog-sweep |
| created_at | 2026-07-17T16:20:14Z |
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