USM portlet not opening with a popup error containing: Error communicating with HOST <PRIMARY HUB IP ADDRESS> on PORT 4334

Document ID : KB000043365
Last Modified Date : 14/02/2018
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The USM portlet fails to load and there is a popup error with:

An unknown error has occrred. 

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Details: com.firehunter.ump.exceptions.DataFactoryException : Error communicating with HOST <PRIMARY HUB IP ADDRESS> on PORT 4334.


The discovery_server log also has error on this:

Retrying... : clojure.lang.ExceptionInfo: Error communicating with HOST <PRIMARY HUB IP ADDRESS> on PORT 4334 {:alt-host nil, :peer-version 2, :password "...", :username "...", :port 4334, :host "<PRIMARY HUB IP ADDRESS>", :version "0.9.5130", 


What's happening is the wasp probe cannot reach the udm_manager probe on the port that it listens on for Datomic connections(4334). Typically this is a result of a problem in the discovery information.



1 deactivate the udm_manager and discovery_server probes

2 At the database run a query to truncate the datomic_kvs table. 

This example is for MS SQL Server using the default database name CA_UIM. 

truncate table [CA_UIM].[dbo].[datomic_kvs]

2 activate the udm_manager and discovery_server probes.


Additional Information:

If the truncating datomic_kvs does not resolve the problem follow the steps in this knowledge base document.


How to reset discovery in CA UIM 8.10 or later