[Bug]: fail to flush the collection: knowledge_base

[Xcrab]

Current Behavior

Expected Behavior

No response

Steps To Reproduce

I want to backup milvus data, but milvus_backup always says "fail to flush the collection".

btw, I found that, When the milvus gets stuck in an exception for some reason(No space left on device、reboot linux), milvus displays error logs(reason=Timestamp lag too large") for a long time. why ?

Environment

No response

Anything else?

No response

[wayblink]

@Xcrab It is a Milvus issue, please ask it in milvus repo or discord(https://discord.com/channels/1160323594396635310).