etcd v3 key attached on an expired lease.

[Aditya Dani]

Hello,

I have a 3 node etcd cluster in which I am creating a key which is attached with a lease.

On one of the nodes I see the following

# etcdctl --endpoints=[127.0.0.1:2379]--write-out="fields" get <key>

"ClusterID" : 7883545499860909880

"MemberID" : 4450878479066924184

"Revision" : 25346

"RaftTerm" : 11

"Key" : "<key>"

"CreateRevision" : 20001

"ModRevision" : 20001

"Version" : 1

"Value" : "<value>"

"Lease" : 331116914086947474

"More" : false

"Count" : 1

However the lease associated with this key has expired

# etcdctl lease timetolive 4985D143B46AA92

lease 04985d143b46aa92 granted with TTL(0s), remaining(-1s)

Shouldn't this key have been deleted?

However if I set the endpoints to a list of 3 etcd nodes, etcdctl returns the correct output.

#  etcdctl --endpoints=[<list of ips>] --write-out="fields" get <key>

"ClusterID" : 7883545499860909880

"MemberID" : 4450878479066924184

"RaftTerm" : 11

"More" : false

"Count" : 0

Why do I see such a discrepancy in the outputs? One thing to note here is that the node which shows incorrect data rebooted when this lease was alive.

[Gyu-Ho Lee]

When etcd server reboots, it refreshes TTLs on the leases.

On lease expiration, lease gets deleted.

"Count" : 0 means the key got deleted, which is expected.

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Sincerely,

Gyu-Ho Lee

[Aditya Dani]

If you look closely, on one of the etcd nodes this key did not get deleted, where the Count is 1.

From the 2 commands I posted, the 1st one has endpoints set to only one node where the count is still 1, but in the 2nd command output, I had set the endpoint to all the 3 nodes and then I got the count as  0. I am wondering why do we see this inconsistency on that one node.

[Gyu-Ho Lee]

It shouldn't happen, and I cannot reproduce with current etcd master branch.

Could you share the reproducible steps here https://github.com/coreos/etcd/issues?

Thanks.

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Sincerely,

Gyu-Ho Lee