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[thredds] catalogScan not working with aggregation?

Dear community members,
I am trying the TDS5 with the brilliant <catalogScan> element that allows to add catalogs without a restart. However, if I create a dataset using <aggregation>, it seems that a restart is still required. Is there a way to also add aggregated datasets during runtime, or is this impossible? 

Details:

I have the following dataset in my runtime-provided catalog:

<dataset name="ytest_vHR04d" ID="xid_of_dataset4" urlPath="xsteffen/testd">
          <serviceName>all</serviceName>
          <netcdf xmlns="http://www.unidata.ucar.edu/namespaces/netcdf/ncml-2.2";>                   <aggregation dimName="time" type="joinExisting" timeUnitsChange="true">                           <scan location="/silod5/radtke/modelresults/GETM/BalticSea1nm_1850/vHR04/thredds_test/"                                   suffix="*/BalticSea1nm.mean.nc" subdirs="true"/> 
                        <variable name="eta" orgName="z">
                                <attribute name="long_name" value="sea surface elevation"/> 
                        </variable>
                  </aggregation>
          </netcdf>
  </dataset>
The dataset shows up, but it gives the following error if I access the OpenDAP service: 

Error {
    code = 404;
    message = "xsteffen/testd";
};

It works perfectly fine after restarting the Thredds server.

Best regards,

Hagen Radtke

Leibniz Institute for Baltic Sea Research Warnemünde (IOW)
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