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Posted to dev@poi.apache.org by bu...@apache.org on 2007/01/12 14:02:57 UTC
DO NOT REPLY [Bug 41357] New: - OutOfMemoryException and Infinite Loop in HSLFSlideShow
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Summary: OutOfMemoryException and Infinite Loop in HSLFSlideShow
Product: POI
Version: 3.0-dev
Platform: All
OS/Version: other
Status: NEW
Severity: normal
Priority: P2
Component: HSLF
AssignedTo: poi-dev@jakarta.apache.org
ReportedBy: asf@raikoeckstein.de
The HLSFSlideShow.readPictures() method can result in an infinite loop.
When trying to instantiate an PowerPointExtractor with
poi-scratchpad-3.0-alpha3-20061212.jar the following exception was raised.
Problem reading picture: java.lang.IllegalArgumentException: Unsupported picture
type: -61464
You document will probably become corrupted if you save it!
While debugging i noticed that POI was trying to read pictures out of a PPT
presentation, unfortunately at least one picture was of size 0 (don't know why).
That made the method HSLFSlideShow.readPictures() ran into an infinite loop
at line 283 at
pos += imgsize;
because imgsize was zero.
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DO NOT REPLY [Bug 41357] - OutOfMemoryException and Infinite Loop in HSLFSlideShow
Posted by bu...@apache.org.
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nick@torchbox.com changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|REOPENED |RESOLVED
Resolution| |FIXED
------- Additional Comments From nick@torchbox.com 2007-01-15 08:41 -------
Ah, I was being bitten by java's garbage collection not playing nicely with
loops of the kind we're using
I've shifted the byte array creation until after we've decided we have a real
picture. That fixes the memory exception for me. (I've also added a test to the
suite, using your sample doc, to check it stays fixed)
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DO NOT REPLY [Bug 41357] - OutOfMemoryException and Infinite Loop in HSLFSlideShow
Posted by bu...@apache.org.
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------- Additional Comments From yegor@dinom.ru 2007-01-12 05:34 -------
Could you attach the ppt file? Without it it is impossible to debug the problem.
Yegor
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DO NOT REPLY [Bug 41357] - OutOfMemoryException and Infinite Loop in HSLFSlideShow
Posted by bu...@apache.org.
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nick@torchbox.com changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |FIXED
------- Additional Comments From nick@torchbox.com 2007-01-12 06:21 -------
It shouldn't be able to get into an infinite loop, as the code always winds on
by the size of the header block (8 bytes)
I've added a check to ensure the img size is positive, since a negative one
could lead to an infinite loop.
Can you re-open the bug if this doesn't help, and upload the problem document?
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DO NOT REPLY [Bug 41357] - OutOfMemoryException and Infinite Loop in HSLFSlideShow
Posted by bu...@apache.org.
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asf@raikoeckstein.de changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
Resolution|FIXED |
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DO NOT REPLY [Bug 41357] - OutOfMemoryException and Infinite Loop in HSLFSlideShow
Posted by bu...@apache.org.
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------- Additional Comments From asf@raikoeckstein.de 2007-01-12 10:17 -------
Created an attachment (id=19401)
--> (http://issues.apache.org/bugzilla/attachment.cgi?id=19401&action=view)
The ppt presentation
Unfortunately that change didn't help. I attached the problematic ppt file.
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