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https://issues.apache.org/jira/browse/IGNITE-11465?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16782892#comment-16782892
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Ivan Rakov commented on IGNITE-11465:
-------------------------------------
TC: https://ci.ignite.apache.org/viewQueued.html?itemId=3227383
> Multiple client leave/join events may wipe affinity assignment history and
> cause transactions fail
> --------------------------------------------------------------------------------------------------
>
> Key: IGNITE-11465
> URL: https://issues.apache.org/jira/browse/IGNITE-11465
> Project: Ignite
> Issue Type: Bug
> Reporter: Ivan Rakov
> Assignee: Ivan Rakov
> Priority: Major
> Fix For: 2.8
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> We keep history of GridAffinityAssignmentCache#MAX_HIST_SIZE affinity
> assignments. However, flood of client joins/leaves may wipe it out entirely
> and cause fail/hang of transaction that was started before the flood due to
> the following exception:
> {code:java}
> if (cache == null || cache.topologyVersion().compareTo(topVer) >
> 0) {
> throw new IllegalStateException("Getting affinity for
> topology version earlier than affinity is " +
> "calculated [locNode=" + ctx.discovery().localNode() +
> ", grp=" + cacheOrGrpName +
> ", topVer=" + topVer +
> ", head=" + head.get().topologyVersion() +
> ", history=" + affCache.keySet() +
> ']');
> }
> {code}
> History is limited in order to prevent JVM heap overflow. At the same time,
> only "server event" affinity assignments are heavy: "client event"
> assignments are just shallow copies of "server event" assignments.
> I suggest to limit history by the number of "server event" assignments.
> Also, considering the provided fix, I don't see any need to keep 500 items in
> history. I propose to change history size to 50.
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