CTGDIS810E handleException - cannot handle exception , update com.ibm.dsml2.jndi.DSML2NamingException: other:null

CTGDIS810E handleException - cannot handle exception , update 
com.ibm.dsml2.jndi.DSML2NamingException: other:null

This above exception came when i was creating few test users in ISIM test environment and I had prepared all the test users data correctly in input file for loading in ISIM via  HR feed manual execution, After execution i saw this exception in TDI logs and i realized that something went wrong in HRMS feed JNDI DSML connector and in JNDI connection configuration.
I did my analysis and had performed few actions like comparison with production JNDI AL, configuration match....etc.
After putting all the things and without success, randomly i had look trace.log and saw ITIM messaging bus was stopped. immediately I realized because of this reason ITIM bus was not processing the requests to ISIM.
Simply I took WAS restart and the problem got resolved without crying here and there.