[jira] [Updated] (CASSANDRA-20593) The chunk cache does not retain chunks for early open sstables

["Branimir Lambov (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CASSANDRA-20593?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Branimir Lambov updated CASSANDRA-20593:
----------------------------------------
    Attachment: EarlyOpenCachingTest.java

> The chunk cache does not retain chunks for early open sstables
> --------------------------------------------------------------
>
>                 Key: CASSANDRA-20593
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-20593
>             Project: Apache Cassandra
>          Issue Type: Bug
>          Components: Local/Caching
>            Reporter: Branimir Lambov
>            Priority: Normal
>         Attachments: EarlyOpenCachingTest.java
>
>
> The chunk cache is invalidated [when a {{FileHandle}} is closed|https://github.com/apache/cassandra/blob/trunk/src/java/org/apache/cassandra/io/util/FileHandle.java#L239], which is called for sstables that have been opened early when they are switched out.
> This means that it cannot retain data between different stages of opening files early, and also for the final sstable.
> To avoid this, cache invalidation can be done when the sstable reader is tidied, at the time when [the system cache is being released|https://github.com/apache/cassandra/blob/trunk/src/java/org/apache/cassandra/io/sstable/format/SSTableReader.java#L1673].



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