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fix: remove wrong start timetick to avoid filtering DML whose timetick is less than it. (#44691)

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issue: #41611

- introduced by #44532

Signed-off-by: chyezh <chyezh@outlook.com>
This commit is contained in:
Zhen Ye 2025-10-09 20:39:58 +08:00 committed by GitHub
parent e55e63288e
commit 97c987f313
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GPG Key ID: B5690EEEBB952194
1 changed files with 6 additions and 9 deletions
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15
internal/datacoord/handler.go
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@ -439,7 +439,12 @@ func (h *ServerHandler) getCollectionStartPos(channel RWChannel) *msgpb.MsgPosit
// use collection start position when segment position is not found
collection, err := h.GetCollection(h.s.ctx, channel.GetCollectionID())
if collection != nil && err == nil {
startPosition := getCollectionStartPosition(channel.GetName(), collection)
startPosition := toMsgPosition(channel.GetName(), collection.StartPositions)
// We should not set the timestamp to collectionInfo.CreatedAt
// because after enabling streaming arch, every shard has its own timetick, no comparison can be applied cross shards timetick.
// because when using the collection start position, we don't perform any sync operation of data,
// so we can just use 0 here without introducing any repeated data to avoid filtering some DML whose timetick is less than collectionInfo.CreatedAt.
// And after enabling new DDL framework, the collection start position will have its own timestamp, so we can use it directly.
log.Info("NEITHER segment position or channel start position are found, setting channel seek position to collection start position",
zap.Uint64("posTs", startPosition.GetTimestamp()),
zap.Time("posTime", tsoutil.PhysicalTime(startPosition.GetTimestamp())),
@ -485,14 +490,6 @@ func (h *ServerHandler) GetChannelSeekPosition(channel RWChannel, partitionIDs .
return nil
}
func getCollectionStartPosition(channel string, collectionInfo *collectionInfo) *msgpb.MsgPosition {
position := toMsgPosition(channel, collectionInfo.StartPositions)
if position != nil {
position.Timestamp = collectionInfo.CreatedAt
}
return position
}
func toMsgPosition(channel string, startPositions []*commonpb.KeyDataPair) *msgpb.MsgPosition {
for _, sp := range startPositions {
if sp.GetKey() != funcutil.ToPhysicalChannel(channel) {