Getting dispatcher error while acknowledging alert in UMP

Document ID : KB000100594
Last Modified Date : 08/06/2018
Show Technical Document Details
Introduction:
When acknowledging alarms from the UMP USM alarm view, getting the following pop-up error:

An unknown error has occurred.
Refreshing your browser may resolve the issue.

Details:
com.firehunter.ump.exceptions.DataFactoryException : (120) Callback error, Received status (120) on response (for sendRcv) for cmd = 'dispatcher'
Please check the log for more information.
Stack Trace:
java.lang.RuntimeException: (120) Callback error, Received status (120) on response (for sendRcv) for cmd = 'dispatcher'
    at com.ca.shift.client.RequestPoolRemoteEndpoint.invoke(RequestPoolRemoteEndpoint.java:39)
    at com.ca.shift.client.RemoteInvocation.createInvocation(RemoteInvocation.java:87)
    at com.ca.shift.client.RemoteInvocation.invoke(RemoteInvocation.java:56)
    at serviceProxy$com.nimsoft.events.api.NasAlarmService.acknowledgeAlarms(Unknown Source)
    at com.nimsoft.events.client.EmsClient.clear(EmsClient.java:445)
    at com.firehunter.usm.alarms.EmsAlarmProvider.acknowledgeAlarms(EmsAlarmProvider.java:259)
    at com.firehunter.usm.AlarmUtils.ackAlarms(AlarmUtils.java:558)
    at com.firehunter.usm.DataFactory.ackMemberAlarms(DataFactory.java:1151)
    at com.firehunter.usm.DataFactory.ackMemberAlarms(DataFactory.java:1144)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
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Question:
How to prevent getting "Callback error, Received status (120) on response (for sendRcv) for cmd = 'dispatcher'" errors when acknowledging alarms from the UMP USM portlet?
Environment:
UIM/UMP 8.51
Answer:
Here are a couple of procedures that can be tried to resolve this issue:

1.  Restart the wasp probe on the UMP robot(s)

2.  If you are not integrated with CA Spectrum using the spectrumgtw probe and have the 9.01 ems probe deployed:
a.  Deactivate ems probe
b.  Deactivate trellis probe
c.  Delete the ems probe and delete the ems directory and it contents
d.  Deploy ems 9.01 probe from the archive
e.  Activate trellis then the ems probes

3.  If you are integrated with CA Spectrum using the spectrumgtw probe and have the 9.01 ems probe deployed:
a.   Deactivate the spectrumgtw probe
b.  Deactivate ems probe
c.  Deactivate trellis probe
d.  Delete the ems probe and delete the ems directory and it contents
e.  Delete the cache directory and its contents from under the spectrumgtw probe
f.  Deploy ems 9.01 probe from the archive
g.  Activate trellis then the ems probes
h.  Activate the spectrumgtw probe