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Problem There is no information showing in the UI.
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Cause In upgrate from 3.2.6 to 5.0.0, Elasticsearch indexes aren't recreated, because not indexes exist, but aren't compatible with 5.0.0-alpha. When service name registered, the es will create this column by default type string, which is wrong.
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Solution Clean the data folder in ElasticSearch and restart ElasticSearch, collector and your under monitoring application.