[rrd-developers] Re: rrdtool-1.2.12, Holt-Winters window-length > 28 problem

[Tobias Oetiker]

Hi Dave,

If you send a complete demo (with create and tune) then I can run
this on purify to get some better handle on the problem

cheers
tobi

Yesterday Dave Plonka wrote:

>    $ /usr/local/rrdtool-1.2.12/bin/rrdtool tune \
>    one_sec_rates_dist_hw.rrd \
>    --failure-threshold 2100 \
>    --window-length 2700
>    free(): invalid pointer 0x914e318!
>    Memory fault
>    $
>
> gdb shows that the problem happens on this line of the function "rrd_free":
>
>    if (rrd->rra_ptr) free(rrd->rra_ptr);
>
> Any ideas why this happens?  Seems as though some pertinent data
> structure is probably not be resized according to
> MAX_FAILURES_WINDOW_LEN but it's not obvious to me why the rra_ptr is
> being clobbered.
>
> Dave
>
>

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