Github user afs commented on the issue:
https://github.com/apache/jena/pull/151
(going off pull/151.diff, which isn't always perfect):
There is still a global server created in fuseki1/ServerTest by:
```
static { allocServer() ; }
```
I don't know why that has been enabled. I have now completely removed it
from the code - see a latest state of http_op_3.
I can't see what code state you're working from. Could you push what you
have?
There were more tidying up left over than I expected - I may have not
committed the right set though a visual check didn't suggest any problems.
What you see is a symptom of the old and new server being around at the
same time. I believe that the pooling client can cause old server to hang
around because, as it is localhost, the pool has open TCP connections. That's
why `ServerCtl.setPoolingHttpClient` closes down the pool with explicit
`.close`.
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