On 2013-07-18, Rene Groeschke wrote:

> Just to understand this completely. Zip64Mode.Never was the default in
> earlier ant versions and this has changed with ant 1.9.0?

Ant didn't support ZIP64 extensions at all prior to 1.9.0, so yes, in a
way "Never" was the default.  In 1.9.0 "AsNeeded" was used with no way
for the user to control it.

ZIP64 extensions are needed to support large archives or big individual
entries (bigger than 4GB).

The ZIP format knows something called "extension fields" and ZIP64 is
one such field.  ZIP readers are supposed to ignore fields they don't
know to handle but Java5's java.util.zip package will rather fail in
that case.  One of the many cases where java.util.zip is broken.

Stefan

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