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https://issues.apache.org/jira/browse/PDFBOX-1977?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13932163#comment-13932163
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Tilman Hausherr commented on PDFBOX-1977:
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This is getting into a philosophical discussion. But I think that both have
their advantage, i.e. fixed tests, but also totally random tests that tell a
seed so that they can be repeated later.
John, you didn't answer how you found this fail. I suspect that the test was
run for a longer time, although a "lucky" hit might also be the reason. Anyway,
it is great that you found it, because it showed a real problem.
> LZWFilter fails / TestFilters is non-determinate
> ------------------------------------------------
>
> Key: PDFBOX-1977
> URL: https://issues.apache.org/jira/browse/PDFBOX-1977
> Project: PDFBox
> Issue Type: Bug
> Affects Versions: 1.8.5, 2.0.0
> Reporter: John Hewson
> Assignee: Tilman Hausherr
> Labels: LZW
> Fix For: 1.8.5, 2.0.0
>
>
> TestFilters uses Random().nextLong() to generate a seed for random data,
> which means that it is non-determinate. Depending on the seed value, the test
> may fail or succeed.
> Using the following seed results in the LZW filter failing:
> final long seed = -6257105096642706464L;
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