[Helma-user] Parsing JSON

[Hannes Wallnoefer]

Hi Kris,

On 11/26/07, Kris Leite <kleite at imcsoftware.com> wrote:
> In case anybody is parsing a large number of JSON strings and found
> memory leakage issues you might consider replacing the Rhino Eval
> command with another JSON parser.

Is this something you can reproduce, or does it happen intermittently?
Because if it is a problem with Rhino, I'd rather have this fixed.

> I found that using the JSON parser in Helma, that uses the Rhino Eval
> command, to cause unexplained memory lost when using it to parse some
> 75K+ small JSON strings.  This occurred with a single long running task
> that using JSON strings for passing data between a Helma server and

Can you send me some test data or code?

> another computer.  When I replaced the Rhino Eval with a javascript JSON
> parser, my memory lost disappeared.
>
> I also found a couple changes to Property.java to be useful also:
>
> 1) Changed the line in 'setStringValue' from:
>
> value = str:
>
> to:
>
> value = (str == null) ? null : new String(str);
>
> 2) Changed the line 'Property(String propname, Node node)' from:
>
> this.propname = propname;
>
> to:
>
> this.propname = (propname == null) ? null : new String(propname);

That would be strange, but it would be possible if these strings are
somehow used in weak references. I'll look into this.

hannes

> Your Mileage May Vary,
> Kris
>
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