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If the ES server is not responding it could be for several reasons:
- The ES server is not started
- The ES server is not configured to listen on localhost or 127.0.0.1
- The ES server is not installed at all.
In your case, it was the third option. You just need to install Elasticsearch as explained in the Django Haystack docs, start it and then it will work.
๐คVal
Source:stackexchange.com