eureka server will not reregister after peer server restarts

[ouaibsky]

Describe the bug
This is a revival of #4145 , It should have been fixed in 4.0.1
But still present in version 4.0.3

Sample

• Spring boot 3.1.5
• Spring cloud 2022.0.4

REPRODUCIBLE EXAMPLE in comment here under

Scenario :

• start a cluster of 2 servers.
• Kill one server
• restart the killed serve
  => this restarted server won't be able to re-register on the other server

ERROR in log of first server:

Caused by: com.fasterxml.jackson.databind.exc.MismatchInputStreamException: Root name ('timestamp') does not match expected ('instance') for type 'com.netflix.appinfo.InstanceInfo'
...

c.n.discovery.shared.transport.decorator.RetryableEurekaHttpClient:130 Request execution failed with message: HTTP 400 Bad Request.

Sorry I cannot copy/paste from my company laptop.

[spencergibb]

So this is replication, not apps?

[ouaibsky]

Yes replication, but I didn't test more ahead)
And workaround cannot be applied when you have security in place, like basic auth, 404 will be sent in place of 401).

[ouaibsky]

Hello
any news on this ?
I'm surprised that many peoples do not face this issue !
I mean how is it possible to use eureka in prod:

• Without multi instance (resilience)
• without authentication (security)

It looks like it's minimal requirement ?

[ouaibsky]

Hi finally managed to provide a project to reproduce the issue
Java21 / Maven / boot 3.2.1 / cloud 2023.0.0. It includes 2 intelliJ runner (peer1 and peer2), but it's basically 2 spring profiles

Steps to reproduce

• Run peer1 and peer2, check homepage and wait both instances appear under application list (name: EUREKA).
• Kill peer2
• important: Wait peer1 homepage do not display any reference to peer2 !
• start peer2 and you'll get the error in peer1's log

eureka.zip

@spencergibb :Can you update label of this issue to Bug please ?

Regards

[ouaibsky]

Looks like the issue is coming from AbstractJersey3EurekaHttpClient into method sendHeartBeat, response status is not check and it tries to decode a body when status is NOT_FOUND.

I'm not able to find the source repository (not in spring-cloud-netflix, notrin netflix/eureka (like pom suggest))

Any clue ?

Simple fix:

            if (response.getStatus() != 404 && response.hasEntity()) {
                eurekaResponseBuilder.entity(response.readEntity(InstanceInfo.class));
            }

[spencergibb]

Closing in favor of Netflix/eureka#1540