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Hi John and Roy, Yes, I see this problem too with a joinExisting aggregation of mooring data where the last file in the aggregation is clobbered and recreated every two hours. To fix it I follow Roy's step 1 AND I reload the app with Tomcat's manager. (I've found that I need to do both of these steps to correct the problem.) If I've reloaded the app more than a few times I see the permgen error and will need to restart Tomcat - most of the time I just restart tomcat after removing the cache/agg files. I¹ve struggled to consider a more permanent fix to this problem. If anyone has some suggestions my ears are wide open. -Mike -- Mike McCann Software Engineer Monterey Bay Aquarium Research Institute 7700 Sandholdt Road Moss Landing, CA 95039-9644 Voice: 831.775.1769 Fax: 831.775.1736 http://www.mbari.org On 5/19/11 3:59 PM, "John Maurer" <jmaurer@xxxxxxxxxx> wrote: > MANY THANKS, ROY! That cleared up all the problems. I'm hugely relieved that I > and/or my disk weren't going haywire. :) OK, catching my breath... phew. > Cheers, > John Maurer > > On Thu, May 19, 2011 at 12:48 PM, Roy Mendelssohn <Roy.Mendelssohn@xxxxxxxx> > wrote: >> Hi John: >> >> We have run into this too, particularly when adding new datasets. Whenever >> we do, we always do the following and find it clears up the problem: >> >> 1. Delete all of $TOMCAT_HOME/content/thredds/cache/agg >> >> 2. Delete all of $TOMCAT_HOME/content/thredds/cache/ehcache >> >> not certain ehculprit - it looks like the ehcache might assosciate the agg >> cache with certain datasets, and if that gets changed the list gets out of >> whack, but that is a wild guess. What I do know is that when we have that >> problem, those two steps clear it up. >> >> The downside is that access to large aggregate datasets is slow the first >> time they are accessed. >> >> -Roy >> >> On May 19, 2011, at 2:24 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? >>> > >>> > 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. 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) >>> > >>> > 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? >>> > >>> > I've copied the relevant agg and collection caches, config files, and >>> threddsServlet.log to my anonymous ftp server at: >>> > >>> > ftp.soest.hawaii.edu <http://ftp.soest.hawaii.edu> >>> > jmaurer/thredds/ >>> > >>> > Thanks for your help!, >>> > John Maurer >>> > Pacific Islands Ocean Observing System (PacIOOS) >>> > University of Hawaii >>> > _______________________________________________ >>> > thredds mailing list >>> > thredds@xxxxxxxxxxxxxxxx >>> > For list information or to unsubscribe, visit: >>> http://www.unidata.ucar.edu/mailing_lists/ >> >> ********************** >> "The contents of this message do not reflect any position of the U.S. >> Government or NOAA." >> ********************** >> Roy Mendelssohn >> Supervisory Operations Research Analyst >> NOAA/NMFS >> Environmental Research Division >> Southwest Fisheries Science Center >> 1352 Lighthouse Avenue >> Pacific Grove, CA 93950-2097 >> >> e-mail: Roy.Mendelssohn@xxxxxxxx (Note new e-mail address) >> voice: (831)-648-9029 >> fax: (831)-648-8440 >> www: http://www.pfeg.noaa.gov/ >> >> "Old age and treachery will overcome youth and skill." >> "From those who have been given much, much will be expected" >> > > > > _______________________________________________ > thredds mailing list > thredds@xxxxxxxxxxxxxxxx > For list information or to unsubscribe, visit: > http://www.unidata.ucar.edu/mailing_lists/
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