[jira] [Resolved] (IGNITE-8508) Zookeeper discovery SPI may notify custom message ACK with out-of-order topology version

["Alexey Goncharuk (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/IGNITE-8508?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Alexey Goncharuk resolved IGNITE-8508.
--------------------------------------
    Resolution: Fixed

Merged to master.

> Zookeeper discovery SPI may notify custom message ACK with out-of-order topology version
> ----------------------------------------------------------------------------------------
>
>                 Key: IGNITE-8508
>                 URL: https://issues.apache.org/jira/browse/IGNITE-8508
>             Project: Ignite
>          Issue Type: Improvement
>            Reporter: Alexey Goncharuk
>            Assignee: Alexey Goncharuk
>            Priority: Major
>             Fix For: 2.6
>
>
> I observed the following assertion in one of my tests.
> {code}
> java.lang.AssertionError: Topology version out of order [this.topVer=Snapshot [topVer=AffinityTopologyVersion [topVer=5, minorTopVer=0]], topVer=4, node=ZookeeperClusterNode [id=2933aa95-0161-4a0d-aad8-274a7b887fae, addrs=[172.25.1.30, 172.17.0.1, 0:0:0:0:0:0:0:1%lo, 127.0.0.1], order=1, loc=true, client=false], nextTopVer=AffinityTopologyVersion [topVer=4, minorTopVer=1], evt=DISCOVERY_CUSTOM_EVT]
>     at org.apache.ignite.internal.managers.discovery.GridDiscoveryManager$4.onDiscovery0(GridDiscoveryManager.java:746)
>     at org.apache.ignite.internal.managers.discovery.GridDiscoveryManager$4.onDiscovery(GridDiscoveryManager.java:589)
>     at org.apache.ignite.spi.discovery.zk.internal.ZookeeperDiscoveryImpl.notifyCustomEvent(ZookeeperDiscoveryImpl.java:3428)
> {code}
> The assertion happens because a custom event ACK is generated after another discovery message processing, which may lead to the following sequence of events:
> {code}
> Custom event (5, 1)
> Node Failed (6, 0)
> Custom event ACK (5, 1)
> {code}
> The root cause is ZK discovery using the original message topology version for notification. TCP discovery uses current ring topology version.



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