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Re: IOOS test data set goes away?


We had a problem where periodically we would show up in the morning to
find that our bathy_catalog.xml would only have 1 entry instead of the
30 or so that it should have.   And restarting tomcat fixed the
problem.   Eventually we discovered that by blocking web crawlers our
problem went away, and the reason speculated by our sys admin was that
the crawlers were gobbling up all the tomcat memory.

So yes, we've seen problems where only one THREDDS catalog seems to be
affected, perhaps by memory issues, and restarting Tomcat helps.

Perhaps your attempt to aggregate 3 years of forecast data into the
FMRC aggregation is blowing things out?

I think we need a tutorial (webinar?) on caching, aggregation and memory...


On Thu, May 28, 2009 at 9:49 AM, Steve Cousins <address@hidden> wrote:
> Hi Rich,
> Do you have problems with THREDDS data sets going away? I came in this
> morning and the Monthly Average data set was available but the IOOS Test one
> was not available. I didn't see anything to speak of in the logs about it.
> Restarting Tomcat brought it back. I remember tomcat being a problem in LAS
> a number of years ago but usually the whole thing would be hosed not just a
> single data set. Is this to be expected?
> Thanks,
> Steve

Dr. Richard P. Signell   (508) 457-2229
USGS, 384 Woods Hole Rd.
Woods Hole, MA 02543-1598

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