stop using mmap for zip I/O

[Alan Bateman]

On 26/02/2015 22:17, christos at zoulas.com wrote:
> Hi,
>
> There are numerous bug reports about the jvm crashing in libzip...
> Just google for "libzip java crash". The bottom line is that using
> mmap is problematic (I can get into more per OS details if necessary)
> because it will potentially signal when the file size is altered.
> Can we please turn USE_MMAP off, and/or remove the code (zip_util.c)?
>
Sherman has a number of proposals here for some time.

In the mean-time then you run run with -Dsun.zip.disableMemoryMapping to 
disable mmapping of the CEN in environments where there is potential to 
overwrite zip files that are in use.

-Alan.