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[THREDDS #FJC-813079]: truncated data download

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  • Subject: [THREDDS #FJC-813079]: truncated data download
  • Date: Wed, 04 Mar 2015 16:36:37 -0700
Fan,

I just noticed that when I refreshed the CSV link (still OSX and Chrome 41), I 
got truncated data, but it responded *very* quickly. Refreshing again quickly 
gave me a different amount of truncated data. This behavior strikes me as odd. 
It's clearly not a timeout, which leads me to believe it's a server issue, not 
a client one.

I'd be very curious to know if those logs show anything interesting.

Ryan

> Fan,
> 
> The TDS will not time out the data transfer--that's got to be a client issue.
> 
> It's technically possible that the slow, or even non-responsive, behavior of 
> the server could be caused by a bug. The logs (threddsServlet.log and 
> catalina.out) may shed some light on that. 4.3.19-SNAPSHOT is a bit out of 
> date as well, the latest 4.3 series release is 4.3.23, released last fall.
> 
> I don't know how big the aggregations are, but in general aggregations are 
> known to be inefficient and have problems scaling to large collections.
> 
> Ryan
> 
> > Hi Ryan,
> >
> > This is curious.  I just tried Safari 8.0.3 (10600.3.18) on OSX - it does 
> > return the full csv data.  In the mean time, netcdf request downloaded an 
> > .html showing server error.  Attached.
> >
> > My request with truncated data was with firefox 31.5.0 on a CentOS 6 
> > machine.  It still does that.
> >
> > My Chrome 40.0.2214.115 on OSX shows just two lines for csv; below (showing 
> > what I mean by truncated).
> >
> > I used wget and curl also (on either OSX or CentOS box) with the csv URL.  
> > Both are returning me incomplete data, though with many more lines than 
> > Chrome 40 does.
> >
> > Occasionally I got server timeouts also.  How do configure TDS to avoid the 
> > timeouts?
> >
> > I just want to make sure it is not a server behavior.  But at the moment I 
> > cannot exclude that possibility.
> >
> > Thanks.
> >
> > -Fan
> >
> > date,lat[unit="degrees_north"],lon[unit="degrees_east"],bbPixNum1[unit=""]
> > 190097-12-16T12:00:00Z,


Ticket Details
===================
Ticket ID: FJC-813079
Department: Support THREDDS
Priority: Normal
Status: Closed