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From "Lars Hofhansl (JIRA)" <>
Subject [jira] [Commented] (PHOENIX-5120) Avoid using MappedByteBuffers for server side sorting.
Date Sat, 02 Feb 2019 22:23:00 GMT


Lars Hofhansl commented on PHOENIX-5120:

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:
>             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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