Streaming sessions from BulkOutputFormat job being listed long after they were killed

[Erik Forsberg]

Hi!

If I run a hadoop job that uses BulkOutputFormat to write data to 
Cassandra, and that hadoop job is aborted, i.e. streaming sessions are 
not completed, it seems like the streaming sessions hang around for a 
very long time, I've observed at least 12-15h, in output from 'nodetool 
netstats'.

To me it seems like they go away only after a restart of Cassandra.

Is this a known behaviour? Does it cause any problems, f. ex. consuming 
memory, or should I just ignore it?

Regards,
\EF