On Mon, 12 Sep 2016, Allison, Timothy B. wrote:
On TIKA-2058, Tim Barrett reported some OOM problems and posted an hprof
of the issue. Luis Filipe Nassif analyzed the hprof and identified
POI's FileBackedDataSource as a potential source of the problem.
It could be. FileBackedDataSource does NIO mmap operations via a
FileChannel. Sadly Sun forgot to finish that API of properly, and there's
no explicit unmap, it happens "magically" at some later date once the file
is closed:
http://stackoverflow.com/questions/2972986/how-to-unmap-a-file-from-memory-mapped-using-filechannel-in-java
Maybe try with the unsupported sun.misc cleaner to see if that frees the
memory?
Nick
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