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Posted to dev@mina.apache.org by "Jörg Michelberger (JIRA)" <ji...@apache.org> on 2019/04/04 11:20:00 UTC
[jira] [Updated] (DIRMINA-1103) Avoid sticky byte array buffers in
Zlib CompressionFilter
[ https://issues.apache.org/jira/browse/DIRMINA-1103?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jörg Michelberger updated DIRMINA-1103:
---------------------------------------
Description:
For each Zlib instance there is a zStream instance which is equipped with new buffers for each in and out of inflate / deflate. This buffers are not released after each inflate / deflate. So the last compressed and uncompressed byte[] and its content for rx and tx is not garbage collectable on each session.
It would be great if there was a reset(zStream) method on Zlib which sets the in and out to static empty byte[] to release these buffers after usage quite before returning from Zlib.deflate and Zlib.inflate. Something like:
{{void reset (zStream) {}}{{ }}
{{ zStream.next_in = EMPTY_BYTE_ARRAY;}}
{{ zStream.next_in_index = 0;}}
{{ zStream.avail_in = 0;}}
{{ zStream.next_out = EMPTY_BYTE_ARRAY;}}
{{ zStream.next_out_index = 0;}}
{{ zStream.avail_out = 0;}}
{{}}}
was:
For each Zlib instance there is a zStream instance which is equipped with new buffers for each in and out of inflate / deflate. This buffers are not released after each inflate / deflate. So the last compressed and uncompressed byte[] and its content for rx and tx is not garbage collectable on each session.
It would be great if there was a reset(zStream) method on Zlib which sets the in and out to static empty byte[] to release these buffers after usage quite before returning from Zlib.deflate and Zlib.inflate.
{{reset (zStream) {}}{{ zStream.next_in = EMPTY_BYTE_ARRAY;}}
{{ zStream.next_in_index = 0;}}
{{ zStream.avail_in = 0;}}
{{ zStream.next_out = EMPTY_BYTE_ARRAY;}}
{{ zStream.next_out_index = 0;}}
{{ zStream.avail_out = 0;}}
{{}}}
> Avoid sticky byte array buffers in Zlib CompressionFilter
> ---------------------------------------------------------
>
> Key: DIRMINA-1103
> URL: https://issues.apache.org/jira/browse/DIRMINA-1103
> Project: MINA
> Issue Type: Improvement
> Affects Versions: 2.0.21
> Reporter: Jörg Michelberger
> Priority: Major
>
> For each Zlib instance there is a zStream instance which is equipped with new buffers for each in and out of inflate / deflate. This buffers are not released after each inflate / deflate. So the last compressed and uncompressed byte[] and its content for rx and tx is not garbage collectable on each session.
> It would be great if there was a reset(zStream) method on Zlib which sets the in and out to static empty byte[] to release these buffers after usage quite before returning from Zlib.deflate and Zlib.inflate. Something like:
> {{void reset (zStream) {}}{{ }}
> {{ zStream.next_in = EMPTY_BYTE_ARRAY;}}
> {{ zStream.next_in_index = 0;}}
> {{ zStream.avail_in = 0;}}
> {{ zStream.next_out = EMPTY_BYTE_ARRAY;}}
> {{ zStream.next_out_index = 0;}}
> {{ zStream.avail_out = 0;}}
> {{}}}
>
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