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If installation location coincides with one of file system roots then / will be used as root for it and available disk space will be determined incorrectly. I.e., we are going to install NetBeans to /mnt/test directory which is one of the file system roots. It's capacity is 200 MB that is not enough for installation, but installer uses / file system root to check free space available and allows installation to /mnt/test. Of course, it will fail. Summing it up, FileUtils.getRoot(...) method algorithm is not greedy enough to get the right root in some cases.
Please provide more info. at least, please attach installation log file, /proc/mounts, output of "df -k" and "mount" commands. Any test case to reproduce with the exact steps... afaik all the methods works correctly. is there any system that I can check that scenario?
Oh... sorry, I read your description the second time and got the issue. I`ll check - likely the fix is trivial...
Fixed: http://hg.netbeans.org/main/rev/e14e5e8ac4cc Igor, please verify ASAP. Thanks for reporting the issue! Good catch!
I've verified the fix. Everything seems to be fine. Thanks.