Heiko,
Did you ever figure this out? We just had our
thredds4.0.26/tomcat6.0.18 crash with "Too man open files" also.
-Rich
On Fri, Sep 18, 2009 at 4:53 AM, Heiko Klein <Heiko.Klein@xxxxxx> wrote:
> Hi,
>
> we just had a crash of the thredds4.0.25/tomcat server and I was able to
> analyse a bit the system before the operators restarted it.
>
> Error message was: 'Too many open files' and checking the open files with
> lsof or /proc/PID/fd showed 1021 open netcdf-files for the tomcat-pid. We
> haven't made any changes to the thredds4 configuration concerning the
> file-caches, so they should be between 200-400. We're using WCS, too, so
> this might add some more files, but still not up to 1021.
>
> We also use some aggregations of netcdf files, so one 'thredds-aggregation'
> might consist of some hundred netcdf-files. Maybe this is counted as one
> file in the fileCache?
>
> I currently try to avoid further crashes by increasing the ulimit -n from
> 1024 to 16384, but I would rather be able to tune the file-cache properly
> instead of throwing more resources at it.
>
>
> Best regards,
>
> Heiko
>
> --
> Dr. Heiko Klein Tel. + 47 22 96 32 58
> Development Section / IT Department Fax. + 47 22 69 63 55
> Norwegian Meteorological Institute http://www.met.no
> P.O. Box 43 Blindern 0313 Oslo NORWAY
>
> _______________________________________________
> thredds mailing list
> thredds@xxxxxxxxxxxxxxxx
> For list information or to unsubscribe, visit:
> http://www.unidata.ucar.edu/mailing_lists/
>
--
Dr. Richard P. Signell (508) 457-2229
USGS, 384 Woods Hole Rd.
Woods Hole, MA 02543-1598
