Thanks for your response Amit.
I see my WSNAVIGATOR disabled and cannot test anything presently. Might be access/authorization issue.
Related to job logs of my consumer, I see the return code as -1, and log as below:
com.sap.engine.services.jndi.persistent.exceptions720.NamenotfoundException: Path to object does not exist. First missing component is [jms], the whole lookup name is [jmsqueues/alertingVP/jms/queue/xi/monitoring/alert/ALERT-TO-MAIL].
Let me know if anything else required. Thanks!!
Shashi