[jira] [Assigned] (CASSANDRA-7234) Post-compaction cache preheating can result in FileNotFoundExceptions when tables are dropped

["Marcus Eriksson (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CASSANDRA-7234?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Marcus Eriksson reassigned CASSANDRA-7234:
------------------------------------------

    Assignee: Marcus Eriksson

> Post-compaction cache preheating can result in FileNotFoundExceptions when tables are dropped
> ---------------------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-7234
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-7234
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>            Reporter: Tyler Hobbs
>            Assignee: Marcus Eriksson
>            Priority: Minor
>              Labels: compaction
>             Fix For: 2.0.9
>
>         Attachments: 0001-reference-sstable-before-populating-keycache.patch
>
>
> In CompactionTask.java, after a compaction finishes, we do this:
> {code}
>         replaceCompactedSSTables(toCompact, sstables);
>         // TODO: this doesn't belong here, it should be part of the reader to load when the tracker is wired up
>         for (SSTableReader sstable : sstables)
>             sstable.preheat(cachedKeyMap.get(sstable.descriptor));
> {code}
> The problem is that if the table was dropped, {{replaceCompactedSSTables}} will release its references on the new {{sstables}}, resulting in them being closed.



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