http://cr.openjdk.java.net/~sherman/6929479/webrev/
This is a rfe to add a system property sun.zip.disableMmap to enable the end user to disable the mmap usage in Sun's java.util.zip.ZipFile implementaiton (for Solaris and Linux platforms).
Application uses java.util.zip.ZipFile might experience SIGBUS vm crash if the application mistakely over-writes zip/jar files that are still being used, for example the application server repeatedly deploy the same jar file into the same location again and again while there is still code (running in the same vm) still accessing this particular zip/ jar file (access the memory that mmapped the central directory of the zip file). While this is indeed an programming error in the offending application, there is situation that the end user really does not have the control of those applications and look for a workaround for the crash. With this property set to true (-Dsun.zip.disableMmap=true) the sun zipfile implementation reads in the central directory into the memory instead of using mmap.
Thanks, Sherman
