java.io.IOException: Too many open files using business-central

We are hitting the file descriptor limit after a few days running RHDM 7.x. The installation only has 1 space with 1 project, however there have been frequent deletion and re-import activities on this project.
 
Observing the lsof count in my local environment, I can see a similar trend:

$ lsof -p `jps|grep 'jboss-modules'|cut -d ' ' -f 1`|grep -c '/data/jboss/rhpam790/.index'
119

...(delete / import Mortgage_Process project)...

$ lsof -p `jps|grep 'jboss-modules'|cut -d ' ' -f 1`|grep -c '/data/jboss/rhpam790/.index'
167

 
It seems that some file descriptors are not properly closed.