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  1. Solr
  2. SOLR-12438

Improve status reporting of metrics history API

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Details

    • Bug
    • Status: Closed
    • Major
    • Resolution: Fixed
    • None
    • 7.4, 8.0
    • metrics
    • None

    Description

      In an offline conversation with janhoy we identified the following areas of improvement to the metrics history API in order to increase its user-friendliness and provide more details about its status.
       

      • there are three possible states for the API: inactive (when not in cloud mode), in-memory only (when .system collection doesn’t exist), and persisted when it’s both active and persisted in Solr. The /admin/metrics/history endpoint should give some hint about this status, such as "mode":"memory/index", "active": true|false. Or a separate action=status just to poll status? Currently when the API is inactive it simply returns 404 Not Found.
      • when in "memory" mode a call to /admin/metrics/history on a non-overseer node should forward the request to the overseer, so that the client does not need to care what mode it is in - kind of like how a query works in distributed mode.
      • better documentation for the API behavior in each mode.
      • perhaps if mode=memory, there could also be a "message":"Warning, metrics history is not being persisted. Please create the .system collection to start persisting history"

      Attachments

        1. SOLR-12438.patch
          64 kB
          Andrzej Bialecki
        2. SOLR-12438.patch
          39 kB
          Andrzej Bialecki

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              ab Andrzej Bialecki
              ab Andrzej Bialecki
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