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From "Dave Somerville (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FOP-2525) [PATCH] Memory leak present when using Truetype Collection (.ttc)
Date Wed, 05 Oct 2016 14:55:21 GMT

    [ https://issues.apache.org/jira/browse/FOP-2525?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15548988#comment-15548988
] 

Dave Somerville commented on FOP-2525:
--------------------------------------

Is anything happening with this ie being released at some point? Having issues with the Glyph
values when specifying any fonts.

> [PATCH] Memory leak present when using Truetype Collection (.ttc)
> -----------------------------------------------------------------
>
>                 Key: FOP-2525
>                 URL: https://issues.apache.org/jira/browse/FOP-2525
>             Project: FOP
>          Issue Type: Bug
>    Affects Versions: 2.0
>         Environment: At least Mac and Linux, both Oracle VM and OpenJDK
>            Reporter: Jeremy Smith
>            Priority: Minor
>         Attachments: FOP-2525.patch, FOP_patch_heap-usage.png, removestatic2.patch
>
>
> When a TrueType Collection file is used to specify custom fonts, and a long-running FopFactory
is used to create FOP instances to process many FO input documents, millions of org.apache.fop.complexscripts.fonts.GlyphPositioningTable$PairValues
and org.apache.fop.complexscripts.fonts.GlyphPositioningTable$Values instances get created
which are never collected.  Thus the heap continues to grow, leading to eventual GC thrashing
or crash.
> When the same fonts are used, but extracted from the TTC file, the issue does not occur,
and the instances of those classes are collected normally.
> The issue can be seen by repeatedly processing a document with a config.xml which specifies
fonts inside of a Truetype Collection file.  Attaching VisualVM to such a process will show
continuous heap growth and millions of aforementioned instances whose numbers never decrease.



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