Campaign API throws different exceptions in same scenario

[KuZon]

Versions

• etcd: 3.5.9
• jetcd: 0.7.3
• java: Corretto-11.0.18.10.1

Describe the bug
campaignResponse = electionClient.campaign(electionName, leaseId, proposal) .get(writeTimeOut, TimeUnit.SECONDS);
There is a leader already available for given electionName. We are doing this call as part of our code from another identical instance, sometimes it throws TimeoutException and some thing an exception which contains etcdserver: invalid auth token. Before upgrading to server 3.5.9 , it was consistently throwing TimeoutException. I

To Reproduce
In two separate programs, run above line. One after another, some times it will throw timeout and sometimes invalid auth token error

Expected behavior
This should be supported from client in a better way to understand if there is a server error or we are just timing out as there is a leader already available.

[lburgazzoli]

@KuZon do you have time to work on a PR ?

[KuZon]

Yes, please guide. I can spend some time.

[KuZon]

@lburgazzoli any update on this ?

[lburgazzoli]

No sorry, I don't have much time at this stage. A PR would be more than welcome

[lburgazzoli]

@KuZon can you provide instructions to reproduce this problem consistently ?

[lburgazzoli]

@KuZon there have been some subtle changes in recent etcd version which should have been fixed.
can you pleas try again using the latest commit ?

[liangyuanpeng]

Have some code for reproduce it would be great.

[lburgazzoli]

@KuZon any feedback ? this is issue will be closed soon without any feedback

[lburgazzoli]

@KuZon ping