AbstractCassandraRdfHector does not stop worker threads after closing (after bulkLoad)

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What steps will reproduce the problem?
1. Open a new CassandraRdfHectorTriple connection
2. Bulk load a TTL file
3. Close the connection

What is the expected output? What do you see instead?
The program should exit normally. Instead the worker threads are running, thus 
the program keeps running.

What version of the product are you using? On what operating system?
CumulusRDF 1.0.1, Cassandra 1.2.16

Please provide any additional information below.

AbstractCassandraRdfHector.close() should shutdown these threads, but it does 
not.

The structure of my program is the following:
crdf = new CassandraRdfHectorTriple(servers, "test");
crdf.open();

crdf.bulkLoad(documentFile, RDFFormat.TURTLE);
-- this creates the following threads:
 - Thread [pool-1-thread-1] (Running)   
 - Thread [pool-1-thread-2] (Running)   
 - Thread [pool-1-thread-3] (Running)   
 - Thread [pool-1-thread-4] (Running)   
 - Thread [pool-1-thread-5] (Running)   

crdf.close();
-- threads still running, however the load was successful

Using the Sesame load method is a workaround, but it is much slower.

Original issue reported on code.google.com by steind...@gmail.com on 27 Jun 2014 at 2:32

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Hi, nice shot! In 1.0.1 we never shutdown the worker thread pool :) I'ill 
commit a patch as soon as possible

Original comment by a.gazzarini@gmail.com on 28 Jun 2014 at 9:34

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Original comment by a.gazzarini@gmail.com on 28 Jun 2014 at 9:38

• Changed state: Started

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Ok, problem has been fixed. I'll ask to our admin to update the artifacts in 
the downloads page and I'll let you know.

Best, 
Andrea 

Original comment by a.gazzarini@gmail.com on 28 Jun 2014 at 9:55

[GoogleCodeExporter]

Hi guys, 

sorry - I was quite busy today, so I haven't updated the downloads yet. 

But - if I understood Andrea correctly - this bug has been fixed in the current 
trunk. So, you can just download the war-package from our Jenkins server [1].

I will update the downloads tomorrow.

HTH
Andreas 

[1] 
http://dev.aifb.kit.edu/jenkins/job/CumulusRDF-trunk/ws/target/cumulusrdf-1.0.1.
war

Original comment by andreas.josef.wagner on 30 Jun 2014 at 12:17