TLK Indexes not filtering partitions as expected

So I have a cluster (alpha-dev) that is on platform version 7.12, and which the test index integration tests in dfsclient DFUIndexTest work against. 

However when I try to filter an index on alpha dev on a key value, still no matching partitions are is coming back. I’ve verified that HPCCFile is getting a TLK partition.

Here’s the test I’m running:

 

HPCCFile file = new HPCCFile("thor::key::cd::vehicle_history::ownership::20211013::idl",
        http://alpha_dev_thor_esp.risk.regn.net:8010/ , "username","password!");
HPCCRecordBuilder rb=new HPCCRecordBuilder(file.getProjectedRecordDefinition());
FileFilter filter = new FileFilter("idl=52");
List<DataPartition> filteredPartitions = file.findMatchingPartitions(filter);
for (int i=0; i < filteredPartitions.size();i++) {
    DataPartition matchedPart = filteredPartitions.get;
    HpccRemoteFileReader<HPCCRecord> fileReader = new HpccRemoteFileReader<HPCCRecord>(matchedPart, file.getRecordDefinition(), rb);
    while (fileReader.getRecordReader().hasNext() )

{         HPCCRecord r=(HPCCRecord) fileReader.getRecordReader().getNext();     }

}