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https://issues.apache.org/jira/browse/PHOENIX-5120?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16759221#comment-16759221
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Lars Hofhansl edited comment on PHOENIX-5120 at 2/2/19 10:27 PM:
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Turns out there's not a single test that tests the use of sort spooling. Only
the SpoolingIterator is tested, which uses a different spooling mechanism.
Sigh. (At least I couldn't find any).
I ran SpooledTmpFileDeleteIT, but it does not test ORDER BY spooling.
was (Author: lhofhansl):
Turns out there's not a single test that tests the use of sort spooling. Only
the SpoolingIterator is tested, which uses a different spooling mechanism.
Sigh. (At least I couldn't find any).
> Avoid using MappedByteBuffers for server side sorting.
> ------------------------------------------------------
>
> Key: PHOENIX-5120
> URL: https://issues.apache.org/jira/browse/PHOENIX-5120
> Project: Phoenix
> Issue Type: Task
> Reporter: Lars Hofhansl
> Priority: Major
> Attachments: 5120-1.4-wip.txt
>
>
> We should had a production outage due to this.
> MappedByteBuffer may leave files around, on top they use direct memory, which
> is not cleared until the JVM executes a full GC.
> See last comment on PHOENIX-2405.
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