Java substrings prevent the original string from being garbage collected;
perhaps this also happens with regex matches?
You can test the theory by surrounding the values in your map with (String.
) and seeing if the problem goes away.
On 5 April 2013 15:57, Adrian Muresan <muresan.adrian...@gmail.com> wrote:
> Hello everyone,
>
> I'm trying to parse a large number of small reports for some data and I'm
> doing this by repeatedly calling the following function (with a for) on
> each of the files:
>
> (defn get-rep [file]
> (let [report (with-open [rdr (io/reader file)](*slurp rdr*))
> reg #";\s+(\d+\.\d+) \s+; (\d+\.\d+) \s+;"
> match (re-matcher reg report)
> found (re-find match)
> fmax-85c (second found)
> rfmax-85c (nth found 2)
> found2 (re-find match)
> fmax-0c (second found2)
> rfmax-0c (nth found2 2)]
>
> {:fmax-85c fmax-85c
> :rfmax-85c rfmax-85c
> :fmax-0c fmax-0c
> :rfmax-0c rfmax-0c}))
>
> My problem is that after a while my program crashes with a jvm heap error,
> it crashes on the slurp line (in bold), although that probably doesn't mean
> much. The slurp line is the only one that I suspect since it's the biggest
> memory consumer in my program.
> Now I'm wondering what's going on and why don't the report files get freed
> from memory. I'm suspecting this might be caused by lazyness at some level,
> but I can't figure out where. Any ideas?
>
> Thanks!
>
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