Integration agent installation issue: 'deduplicator' declaration not found

A customer reported an issue when attempting to install the xMatters integration agent. After installation, the integration would not start, returning the following error:

"Caused by: org.dom4j.DocumentException: Error on line 15 of document : cvc-elt.1: Cannot find the declaration of element 'deduplicator'. Nested exception: cvc-elt.1: Cannot find the declaration of element 'deduplicator'."

This issue is caused by a missing declaration within the deduplicator-filter.xml file.


  1. To address this issue, open the deduplicator-filter.xml file in a text editor, and locate the following parameter:
  1. Change the parameter to the following:
<deduplicator xmlns="">
  1. Save and close the file.
  2. Restart the integration agent.



xMatters internal reference: DTN-4217

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