[Darshan-users] Bad data in file headers

[Phil Carns]

Thanks for the follow up details, Ed. Sounds like it might be time to 
investigate what that app is up to :)

-Phil

On 12/02/2017 10:39 AM, Ed Karrels wrote:
> On Fri, 2017-12-01 at 11:24 -0500, Phil Carns wrote:
> > Hi Ed,
> >
> > I don't think we've seen this particular error before. Is it also
> > the same application/executable every time in addition to being the
> > same user in each case?
>
> Yep, same application, "pcp".  Not sure why I missed these cases 
> before, but there are other users running this application, and each 
> of their darshan3 files have the same errors. So it seems to be the 
> application, not the user.
>
> Rob Latham:
> > Is there any chance darshan2 tools are trying to operate on darshan3
> > files?  I hate to offer such an obvious suggestion, but you have
> > generated both log formats so at some point in time you had darshan2
> > tooling lying around.  Any darshan2 libraries or tools are probably
> > long gone by now but I wanted to rule out the obvious.
>
> I don't think so. All the darshan2 files have ".darshan.gz" as their 
> filename suffix and the first few bytes are a gzip header: 1F 8B 08 00
> These files have ".darshan" as their filename suffix, and the header 
> starts with "3.10".
>
> $ head -c 64 
> logtree/00/2f/heitz_pcp_id7666317_10-15-53224-12998966924006311962_1.darshan 
> | hexdump
> 000000:  33 2E 31 30 00 00 00 00  37 35 64 00 00 00 00 00 3.10....75d.....
> 000010:  00 00 00 00 00 00 00 00  FB 01 00 00 00 00 00 00 ................
> 000020:  05 FE FF FF FF FF FF FF  00 00 00 00 00 00 00 00 ................
> 000030:  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00 ................
>
>
>
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