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https://issues.apache.org/jira/browse/CASSANDRA-19169?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17793402#comment-17793402
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Sam Tunnicliffe edited comment on CASSANDRA-19169 at 12/6/23 4:07 PM:
----------------------------------------------------------------------

[-https://github.com/beobal/cassandra/commits/samt/19169-]


was (Author: beobal):
[https://github.com/beobal/cassandra/commits/samt/19169]

> Don't NPE when initializing CFSs for local system keyspaces with UCS
> --------------------------------------------------------------------
>
>                 Key: CASSANDRA-19169
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-19169
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Transactional Cluster Metadata
>            Reporter: Sam Tunnicliffe
>            Assignee: Sam Tunnicliffe
>            Priority: Normal
>             Fix For: 5.1-alpha1
>
>
> When UnifiedCompactionStrategy is used as the default, NPEs are thrown when
> flushing the system keyspace tables early during startup. The system keyspace 
> is
> initialised before the cluster metadata, but UCS currently tries to access the
> current epoch when initialising the shard manager, to determine whether the
> local ranges are out of date. This isn't necessary for the system keyspaces as
> they use LocalStrategy and cover the whole token space.



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