In EMS server log, sometimes it is shown that messages are being expired. 

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2018-05-09 08:21:02.756 Expired 2 messages.
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Run tibemsminitor under <ems_home>/bin covering the time "Expired xxx messages" is logged by EMS.

For queue:

tibemsmonitor -m 'Q.p.>' -user admin -password <password>

For topic:

tibemsmonitor -m 'T.p.>' -user admin -password <password>

Sample output from tibemsmonitor:

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2018-01-19 11:10:02.565 [EMS-SERVER] $sys.monitor.Q.p.queue.exp
    event_action      = string:  'premature_exit'
    event_class       = string:  'message'
    event_reason      = string:  'expired'
    JMSXDeliveryCount = int:     1
...
    target_dest_name  = string:  'queue.exp'
    target_dest_type  = string:  'queue'
    BytesMessage={Header={ JMSDestination={QUEUE:'queue.exp'} JMSDeliveryMode={NON_P
SCorrelationID={c123} JMSTimestamp={Fri Jan 19 11:09:54 2018} JMSDeliveryTime={Fri J
{int:1}} Body={byte[]:0 bytes}
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Please refer to EMS User's Guide: Chapter 19 Monitoring Server Activity : Monitoring Server Events.