Proposed fix for JDK-8028804 (Deflater.deflateBytes() may produce corrupted output on Deflater level/strategy change)

Alan Bateman Alan.Bateman at
Thu Nov 28 19:29:05 UTC 2013

On 27/11/2013 08:33, Thomas Stüfe wrote:
> I can see arguments for both sides (linking statically vs using the 
> system zlib) and I'm leaning toward the former. Errors or 
> incompatibilities in the zlib could be really harmful, and I rather 
> use the zlib I ran all my tests with instead of the system zlib which 
> may or may not be out of date or show regressions.
Statically linking has its advantages when you are creating a binary 
that needs to run on many distributions. However, I think we have to 
allow for anyone to link against the system zlib. I believe it might 
even be a hard requirement for many of the Linux distributions (there 
are folks from the IcedTea project on this list that will know a lot 
more about that topic).

> So, if I were to recode this fix again to not change the zlib - which 
> is not so trivial - do you think there is a chance that this fix gets 
> examined and maybe pulled into the OpenJDK?
I don't see any reason why not. So I would suggest go ahead and see if 
this can be fixed without changing zlib. If you can come up with a patch 
then bring it here and we can review/discuss it.


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