Re: [las_users] Computations with new LAS installation

The bottom line is that the F-TDS is not working correctly. The trick is to figure out why. Unfortunately there are a lot of moving parts. Have a look at the following:

In the output directory of your LAS (most likely $TOMCAT_HOME/webapps/las/output) you will find a bunch of files of the form XXXX_debug.txt. In those files there should be an ftds_url defined for each data set used by that product request. Grab the URL and put it into a browser and append a ".html" for the end.

E.g http://yourserver.com:PORT/thredds/dodsC/las/ocean_atlas_subset/data_ocean_atlas_subset.jnl.html

If you get an error, there's a clue. If it displays the data set form, try to get some data out by selecting a variable and using the "Get ASCII" button.

My best guess is that one if the steps above will reveal an error, but it does not try an analysis operation an look at the $TOMCAT_HOME/content/thredds/logs/threddsServlet.log for error messages.

Report back on what you find and we'll go from there.

Roland

On Tue, Dec 31, 2013 at 5:34 PM, Brandon Sackmann <bsackmann@xxxxxxxxxxxxxxxxx> wrote:

We are in the process of installing/configuring a new LAS (LAS 8./Ferret 6.85). From what we can tell the initial installation was successful, unfortunately we cannot yet execute requests that require any sort of computation (e.g., Average, Min, Max, Sum, etc.). When we select an option (other than ‘None’) from the ‘Compute’ drop-down we get an error that states:

A component needed for your request is down or was not installed.

If you are the site adminstrator, verify that your F-TDS installation is working correctly, then restart your servlet container (Tomcat) or reinit your server from the admin page.

From what we can see the F-TDS install is working correctly and we have restarted the system as instructed, but the error remains. Any guidance on how we could develop a troubleshooting strategy to figure out what might be going wrong? Requests that do not require computation seem to produce the expected output. We are currently working with the sample dataset provided for testing (i.e., “Subset of World Ocean Atlas monthly 1994 Monthly Means – Temperature”).

Thanks for any insight.

-Brandon