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https://issues.apache.org/jira/browse/IGNITE-8783?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16541789#comment-16541789
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Ilya Lantukh commented on IGNITE-8783:
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[~avinogradov],
I think this code was written to avoid race between handling ack and processing
node failure.
As far as I understand, there is no mechanism to cancel latch for outdated
topology version.
> Failover tests periodically cause hanging of the whole Data Structures suite
> on TC
> ----------------------------------------------------------------------------------
>
> Key: IGNITE-8783
> URL: https://issues.apache.org/jira/browse/IGNITE-8783
> Project: Ignite
> Issue Type: Bug
> Components: data structures
> Reporter: Ivan Rakov
> Assignee: Anton Vinogradov
> Priority: Major
> Labels: MakeTeamcityGreenAgain
>
> History of suite runs:
> https://ci.ignite.apache.org/viewType.html?buildTypeId=IgniteTests24Java8_DataStructures&tab=buildTypeHistoryList&branch_IgniteTests24Java8=%3Cdefault%3E
> Chance of suite hang is 18% in master (based on previous 50 runs).
> Hang is always caused by one of the following failover tests:
> {noformat}
> GridCacheReplicatedDataStructuresFailoverSelfTest#testAtomicSequenceConstantTopologyChange
> GridCachePartitionedDataStructuresFailoverSelfTest#testFairReentrantLockConstantTopologyChangeNonFailoverSafe
> {noformat}
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