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https://issues.apache.org/jira/browse/CASSANDRA-6008?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13832514#comment-13832514
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Ngoc Minh Vo commented on CASSANDRA-6008:
-----------------------------------------
Just for your information, we've run into this issue with v2.0.2 on our dev
environment and the workaround worked.
Hope the fix could be included in the next patch v2.0.3.
Thanks a lot for your help.
> Getting 'This should never happen' error at startup due to sstables missing
> ---------------------------------------------------------------------------
>
> Key: CASSANDRA-6008
> URL: https://issues.apache.org/jira/browse/CASSANDRA-6008
> Project: Cassandra
> Issue Type: Bug
> Components: Core
> Reporter: John Carrino
> Assignee: Yuki Morishita
> Fix For: 2.0.3
>
>
> Exception encountered during startup: "Unfinished compactions reference
> missing sstables. This should never happen since compactions are marked
> finished before we start removing the old sstables"
> This happens when sstables that have been compacted away are removed, but
> they still have entries in the system.compactions_in_progress table.
> Normally this should not happen because the entries in
> system.compactions_in_progress are deleted before the old sstables are
> deleted.
> However at startup recovery time, old sstables are deleted (NOT BEFORE they
> are removed from the compactions_in_progress table) and then after that is
> done it does a truncate using SystemKeyspace.discardCompactionsInProgress
> We ran into a case where the disk filled up and the node died and was bounced
> and then failed to truncate this table on startup, and then got stuck hitting
> this exception in ColumnFamilyStore.removeUnfinishedCompactionLeftovers.
> Maybe on startup we can delete from this table incrementally as we clean
> stuff up in the same way that compactions delete from this table before they
> delete old sstables.
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