[infinispan-issues] [JBoss JIRA] (ISPN-9220) Client listeners are sometimes re-registered twice after infinispan-server restart

[Marek Posolda (JIRA)]

Marek Posolda created ISPN-9220:
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             Summary: Client listeners are sometimes re-registered twice after infinispan-server restart
                 Key: ISPN-9220
                 URL: https://issues.jboss.org/browse/ISPN-9220
             Project: Infinispan
          Issue Type: Bug
          Components: Hot Rod
    Affects Versions: 9.2.1.Final
            Reporter: Marek Posolda


During test of summit, we saw some issue with client listeners. Setup was this:
- Every site had one hotrod client (RHSSO), which used infinispan of version 8.2.8.Final and one infinispan-server, which I think was version 9.2.1.Final
- Client (RH-SSO) had some client listener registered against remoteCache
- After restart of infinispan-server, the RH-SSO was able to re-connect to it and CRUD the items to the remoteCache. But previously registered clientListeners were lost.

Note that setup demo used just 1 infinispan-server on every site, so there were not any topology changes (no possibility of re-balance client listener to other node).

I've tried to do simple reproducer for the scenario above and verified that with client 8.2.8.Final and server 9.2.1.Final, the client listener is not automatically re-registered after restart. 

BUT after upgrade client to 9.2.1.Final, re-registration worked fine and client listener was re-registered automatically. This is important as from long term perspective, we are upgrading to infinispan 9 on RH-SSO side. But I had the opposite issue, that sometimes the client listener is registered twice. See steps to reproduce for the details.



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