Re: [thredds] WMS is not updating when NetCDF file is updated or changed

  • To: Suman Sanjel <Suman.Sanjel@xxxxxxxxxx>
  • Subject: Re: [thredds] WMS is not updating when NetCDF file is updated or changed
  • From: Sean Arms <sarms@xxxxxxxx>
  • Date: Thu, 11 Feb 2021 16:26:21 -0700
Greetings Suman,

It is indeed a caching issue. There are several caches at work within the
netCDF-java and TDS levels, and they generally do not account for the use
case of an individual file being updated or overwritten. There are some
mechanisms in place that are supposed to allow for the various caches to be
purged remotely (though the admin/debug interface), but I do not know if
those actually work (I've seen mixed reports). The 100% way to make sure it
is updated is to restart the server, which can work if updates are
infrequent, but that's still less than ideal. The cache (and control of the
cache) situation is something that I'd like to work on once 5.0 is released.

Cheers,

Sean

On Thu, Feb 11, 2021 at 12:02 PM Suman Sanjel <Suman.Sanjel@xxxxxxxxxx>
wrote:

>  Dear THREDDS Data Server Team,
>
>
>
> It's great to use THREDDS Data Server where we get lots of facilities.
>
>
>
> Currently, We are using Development Release (version 5.0.0-beta8). And it
> is working fine.
>
> I have one query regarding the cache of WMS. I have created WMS for one
> NetCDF file and it is working fine But when I update that NetCDF file the
> WMS is not updating. It seems like WMS is rendering from the cache. So my
> query is that how to Update the WMS once the NetCDF file is updated.
>
>
>
> It will be great if you help to fix this problem.
>
>
>
> Thank You
>
> Suman Sanjel
>
>
>
>
>
>
>
>
>
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