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https://issues.apache.org/jira/browse/IMPALA-8775?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael Ho reassigned IMPALA-8775:
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Assignee: Joe McDonnell (was: Michael Ho)
> Have the option to delete data cache files on Impala shutdown
> -------------------------------------------------------------
>
> Key: IMPALA-8775
> URL: https://issues.apache.org/jira/browse/IMPALA-8775
> Project: IMPALA
> Issue Type: Bug
> Components: Backend
> Affects Versions: Impala 3.3.0
> Reporter: Michael Ho
> Assignee: Joe McDonnell
> Priority: Major
>
> Currently, Impala will delete old data cache files upon restart but it only
> does so when data cache is enabled. However, if the user turns off the data
> cache after restart, the old data cache files may be left hanging around
> until the next restart with the cache enabled. We should have an option to
> delete the data cache files on Impala shutdown. The initial implementation of
> the data cache has the unlink-on-create behavior but it was confusing to
> users as there will be unaccounted usage on the storage side (as the file is
> not easily visible after unlink). We may want to consider support this
> "unlink-on-create" behavior behind a flag in case users prefer to have the
> data cache files removed upon Impala's exit. In the long run, we probably
> want to have an "exit handler" in Impala to make sure resources are freed up
> on Impala exit.
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