my best guess at the moment is that the file caching is causing out-of-memory errors. try reducing the number of maximum files allowed. see THREDDS File Handle Caching (not Java disk cache) in http://www.unidata.ucar.edu/projects/THREDDS/tech/reference/ThreddsConfigXMLFile.html Roy Mendelssohn wrote: > Hi John: > > Might take awhile to set up a test. part of it may be that we are > serving a lot of data, so the TDS creates a lot of threads, and we are > linking to a lot of remote datasets, which appears to give THREDDS some > heartburn. > > All we get are the to errors you saw- the connection times out and > produces an error, and then over time we get the message that a "new > thread can not be created" and that holds for all the catalogs past our > initial first page catalog. The tomcat keeps running, it just can't > produce new threads to do anything. > > Is there some other setting we can do that would help - believe we > already have verbose mode turned on. We have monkeyed with the java > settings repeatedly, and still are unclear the best ones. Some internet > sites say for productions servers, the min and max should be the same, > so that garbage collection works right, we have tried setting the > garbage collection to diferent things - most made it more unstable not > less. > > Thanks, > > -Roy > > On Sep 23, 2008, at 9:18 AM, John Caron wrote: > >> Hi Roy: I got both, thanks. >> >> I tried to reproduce with no luck so far. One can call a broken catref >> a million times and it wont consume memory. I have eliminated the >> stack trace and just put out a warning now, so the logs are a bit more >> readable. >> >> however, there may be a way that the threads get lost, or something >> else in your use case that im not duplicating. >> >> how exactly does the catref get broken? does it return a 404 or just >> hang or ??? >> >> can you can reproduce the problem reliably on a test server? >> >> >> >> Roy Mendelssohn wrote: >>> We have had to do several restarts the last couple of days. To keep the >>> file size manageable (one may or may not got through) I have edited >>> them to the last couple of days. Let me know if you get both files. >>> >>> -roy >>> >>> The original MIME headers for this attachment are: >>> Content-type: text/plain; charset=US-ASCII; format=flowed; delsp=yes >>> Content-transfer-encoding: 7BIT >>> > > ********************** > "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: address@hidden (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"
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