job is finished (I think), yet thread is still running.

[Chris Snow-3]

I have a r4.0 job that is finished (by looking at the database table
that it updates), yet thread is still running, as seen in the Thread List.

Thread: default-invoker-Thread-5
Status:  Running
Job: dhalesUpdateUpliftHpiVariantBatch
Service: dhalesUpdateUpliftHpiVariantBatch
Time (ms):

The service is a minilang service.  How can I debug this problem?  I.e.
Is the job still really running?

Many thanks in advance,

Chris