[jira] [Created] (IMAGING-355) Large animated GIF takes too much heap memory in getMetadata

["Andrew Khoury (Jira)" <ji...@apache.org>]

Andrew Khoury created IMAGING-355:
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             Summary: Large animated GIF takes too much heap memory in getMetadata
                 Key: IMAGING-355
                 URL: https://issues.apache.org/jira/browse/IMAGING-355
             Project: Commons Imaging
          Issue Type: Bug
          Components: Format: GIF
    Affects Versions: 1.0-alpha3
            Reporter: Andrew Khoury


When calling ImageParser.getMetadata on large gif files the java heap consumption is extremely high.

For example, see the test project I created:
https://github.com/andrewmkhoury/commons-imaging-gif-test

When the max heap is set to `-Xmx1488M` or lower it fails with this exception.  When the heap is set to `-Xmx1489M` it works.

{code:java}
Exception in thread "main" java.lang.OutOfMemoryError: Java heap space
	at java.base/java.util.Arrays.copyOf(Arrays.java:3745)
	at java.base/java.io.ByteArrayOutputStream.toByteArray(ByteArrayOutputStream.java:211)
	at org.apache.commons.imaging.mylzw.MyLzwDecompressor.decompress(MyLzwDecompressor.java:143)
	at org.apache.commons.imaging.formats.gif.GifImageParser.readImageDescriptor(GifImageParser.java:881)
	at org.apache.commons.imaging.formats.gif.GifImageParser.readBlocks(GifImageParser.java:596)
	at org.apache.commons.imaging.formats.gif.GifImageParser.readFile(GifImageParser.java:696)
	at org.apache.commons.imaging.formats.gif.GifImageParser.readFile(GifImageParser.java:680)
	at org.apache.commons.imaging.formats.gif.GifImageParser.getMetadata(GifImageParser.java:485)
	at org.apache.commons.imaging.formats.gif.GifImageParser.getMetadata(GifImageParser.java:58)
	at org.apache.commons.imaging.ImageParser.getMetadata(ImageParser.java:832)
	at Test.main(Test.java:28)
{code}



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