Hi Mike:
On 1/4/2011 5:01 PM, McCann, Mike wrote:
Hello,
I am testing some aggregations of real-time /in situ /oceanographic
mooring data served by the THREDDS Data Server.
Generally, the TDS has been working pretty well. I do, however, see
some inconsistent behavior that bay be the result of how I've built
the catalog or may be issues with the THREDDS Data Server. I'd
appreciate any information that will help with these two issues:
1. The .html form does not properly show the indices of the
variable's coordinate axes. For instance, for the data set
<_http://elvis.shore.mbari.org/thredds/dodsC/moorings/OS_MBARI-M1_TS.html_>
clicking on the TEMP variable shows "0:1:0" for each of the
time, depth, latitude, and longitude coordinates. The form seems
to know how many points are in the coordinates as when you
select them on the form they are properly shown. Shouldn't the
variable's coordinates show the same index limits that are shown
for the coordinate variables?
Ill see if we can get that fixed.
1. I was getting errors for an unconstrained requests of TEMP the
M0 & M1 moorings, but not for the M2 mooring, e.g.:
_Mooring M1:
_http://elvis.shore.mbari.org/thredds/dodsC/moorings/OS_MBARI-M1_TS.ascii?TEMP
Returned: NcSDArray java.lang.ArrayIndexOutOfBoundsException
=null for request= NcSDArray read TEMP TIME(0,1,52569)
DEPTH(0,1,10) LATITUDE(0,1,0) LONGITUDE(0,1,0) dataset=
moorings/OS_MBARI-M1_TS
_Mooring M2:
_http://elvis.shore.mbari.org/thredds/dodsC/moorings/OS_MBARI-M2_TS.ascii?TEMP
Returned data
So, guessing that this problem might have something to do with the
THREDDS cache I removed the files in content/thredds/cache/agg.
The problem went away!
It seems that I should probably be using something like the
recheckEvery attribute in my aggregation, but the documentation at
<http://www.unidata.ucar.edu/software/netcdf/ncml/v2.2/Aggregation.html>
seems to imply that it works for only aggregations created by the
scan element. I am using the netcdf element to stitch together
several files with the last one updating about every 2 hours. If I
set recheckEvery = "2 hours" will that solve my problem?
Can you send me your config catalog / ncml aggregation for the good and
the bad datasets?
Do the updating files append only or get completely rewritten ?
I think recheckEvery works only with scans.
John
