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https://issues.apache.org/jira/browse/FOP-2237?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13632668#comment-13632668
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Peter Orolin edited comment on FOP-2237 at 4/16/13 8:54 AM:
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Attachment patch.diff has been added. Concurrent problem was fixed
was (Author: orol):
Attachment patch.diff has been added
> [PATCH]Zoom in "preview screen" should cause NullPointerException
> -----------------------------------------------------------------
>
> Key: FOP-2237
> URL: https://issues.apache.org/jira/browse/FOP-2237
> Project: Fop
> Issue Type: Bug
> Components: awt renderer
> Affects Versions: trunk
> Environment: Operating System: Windows
> Platform: PC
> Reporter: Peter Orolin
> Labels: patch
> Attachments: patch.diff
>
> Original Estimate: 3h
> Remaining Estimate: 3h
>
> Zoom in "preview screen" should cause NullPointerException, because of
> incorrect use of synchronized in class
> org.apache.fop.render.awt.viewer.PreviewPanel.
> Method PreviewPanel.reload() is synchronized, but it creates new Thread,
> which is not under synchronized control. Sometimes, when it is later run
> method PreviewPanel.showPage(), it finishes with NullPointerException (array
> pagePanels is initialized, but objects in the array not -- see
> ShowPageImage.run statement pagePanels[pg - firstPage].setPage(pg);)
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