FDB_RESULT_HANDLE_BUSY returned from 2i compaction goroutine

The following error was printed in the indexer logs when running the 2i test robot.

2016-07-06T12:27:06.117-07:00 [Error] CompactionDaemon: Index instance:2794364774291291164 Compaction failed with reason - FDB_RESULT_HANDLE_BUSY

This indicates sharing of handles between multiple threads and is an incorrect use of forestdb api.
It would be great if we can ensure that there is no sharing of handles across threads when issuing forestdb calls.
indexer is on commit..

commit 68950a3e2318f620ccf5eb76200b57743bfc163c

Merge: ee88d1a 4b89d3c

Author: deepkaran <deepkaran.salooja@gmail.com>

Date:   Tue May 31 15:29:31 2016 -0700

    Merge branch 'unstable'

Please find log attached.
Thanks