Hi John:
On 5/19/2011 3:24 PM, John Maurer wrote:
Hi all,
I'm seeing some weird behavior today with one of our joinExisting NcML
aggregations for high-frequency radio (HFR). The OPeNDAP page lists
variables that are from a totally different dataset (e.g. HFR does not
measure water temperature):
http://oos.soest.hawaii.edu/thredds/idd/hfr.html?dataset=kokagg. I
looked at "content/thredds/cache/agg/" at the aggregation cache file
for the dataset (hioos-hfr-kokagg) and it confirms that it's strangely
pulling files from 3 unrelated datasets: a glider, an NCOM global
FMRC, and the HFR data. Since nothing has changed recently in my
config file for the dataset and I haven't recently upgraded TDS, this
has me worried about a possible disk problem from recent power
outages? The three datasets are not subdirectories of each other, so I
don't see how TDS can be lumping them together. Any ideas what could
be causing this?
A brief look at what you put on ftp confirms it : its a mystery ;^(
No chance you are playing games with symlinks is there?
In addition to the above, 5 of my FMRC's are suddenly inaccessible
today as well and were recently working just fine. It would seem their
file aggregations may have similarly gone haywire as well, but their
cache files under "content/thredds/collection/" (right?) are binary
(.jdb) so I can't confirm whether they're combining multiple datasets.
If you have remote debugging on (and you should!) you can look at the
files with:
https://server/thredds/admin/debug?Collections/showFmrcCache
<https://motherlode.ucar.edu:8443/thredds/admin/debug?Collections/showFmrcCache>
The catalogs give an error in threddsServlet.log with the message:
at
ucar.nc2.ft.fmrc.FmrcDataset.getNetcdfDataset2D(FmrcDataset.java:166)
at ucar.nc2.ft.fmrc.Fmrc.getDataset2D(Fmrc.java:183)
can you send the file content/thredds/logs/featureCollectionScan.log ?
What's the best way for me to clear all TDS caches? Is it safe to
remove "content/thredds/cache/" entirely?, and then restart
Tomcat/TDS? Will it get re-built then automatically after I access
each dataset?
yes, its safe, as roy says, it just slows things down. stop tds, remove,
restart.
i just did a bug fix release 4.2.7 with slightly better logging in case
you want to install it.
if you see this again, zip up content/thredds/cache/agg/* and send it.
Roy have you seen this before, where random directories get put into the
joinExisting xml cache file ?
