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https://issues.apache.org/jira/browse/CASSANDRA-14801?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17054830#comment-17054830
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Aleksandr Sorokoumov commented on CASSANDRA-14801:
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Is anyone working on this ticket? If not, I would like to work on it.
> calculatePendingRanges no longer safe for multiple adjacent range movements
> ---------------------------------------------------------------------------
>
> Key: CASSANDRA-14801
> URL: https://issues.apache.org/jira/browse/CASSANDRA-14801
> Project: Cassandra
> Issue Type: Bug
> Components: Legacy/Coordination, Legacy/Distributed Metadata
> Reporter: Benedict Elliott Smith
> Priority: Normal
> Fix For: 4.0, 4.0-beta
>
>
> Correctness depended upon the narrowing to a {{Set<InetAddressAndport>}},
> which we no longer do - we maintain a collection of all {{Replica}}. Our
> {{RangesAtEndpoint}} collection built by {{getPendingRanges}} can as a result
> contain the same endpoint multiple times; and our {{EndpointsForToken}}
> obtained by {{TokenMetadata.pendingEndpointsFor}} may fail to be constructed,
> resulting in cluster-wide failures for writes to the affected token ranges
> for the duration of the range movement.
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