Graylog integration issue

Graylog Central (peer support)
1

Hi
I’m integrating Graylog 5.2 with Wazuh 4.9 for a SOC PoC but facing issues connecting Graylog to the Wazuh Indexer. I’d appreciate any guidance on compatibility or workarounds. Below are the details.
Environment:

  • OS: Ubuntu 22.04 LTS
  • Wazuh: 4.9.0 (Wazuh Indexer, Manager, Dashboard)
  • Graylog: 5.2.11-1
  • MongoDB: 6.0.18

Issue: Graylog starts but fails to connect to the Wazuh Indexer, showing in /var/log/graylog-server/server.log:
2025-05-01T17:51:23.576Z ERROR [VersionProbe] Unable to retrieve version from OpenSearch/Elasticsearch node 10.10.90.110:9200: unknown error - an exception occurred while deserializing error response: com.fasterxml.jackson.databind.exc.MismatchedInputException: No content to map due to end-of-input

2

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