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  1. Couchbase .NET client library
  2. NCBC-1291

FTS queries _may_ continue to fail after a node goes on/offline

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Details

    • Bug
    • Status: Resolved
    • Critical
    • Resolution: Fixed
    • 2.4.0-dp3, 2.3.11
    • 2.4.1
    • library
    • None

    Description

      This is a clone of NCBC-1291 because the same bug described below exists for FTS.

      System.InvalidOperationException: An invalid request URI was provided. The request URI must either be an absolute URI or BaseAddress must be set.
      at System.Net.Http.HttpClient.PrepareRequestMessage(HttpRequestMessage request)
      at System.Net.Http.HttpClient.SendAsync(HttpRequestMessage request, HttpCompletionOption completionOption, CancellationToken cancellationToken)
      at System.Net.Http.HttpClient.SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
      at System.Net.Http.HttpClient.PostAsync(Uri requestUri, HttpContent content, CancellationToken cancellationToken)
      at Couchbase.N1QL.QueryClient.<ExecuteQueryAsync>d__19`1.MoveNext()
      

      ExecuteQueryAsync uses GetQueryUri to get the query server's URI:
      https://github.com/brantburnett/couchbase-net-client/blob/d852271c09a9116275e058412f1f82eabacbed01/Src/Couchbase/N1QL/QueryClient.cs#L367

      Uri is considered healthy if it has failed less than 2 times since last success, returns null if no query nodes avail:
      https://github.com/brantburnett/couchbase-net-client/blob/d852271c09a9116275e058412f1f82eabacbed01/Src/Couchbase/Configuration/ConfigContextBase.cs#L71

      Count is only reset if there is a successful query, no other time:
      https://github.com/brantburnett/couchbase-net-client/blob/d852271c09a9116275e058412f1f82eabacbed01/Src/Couchbase/N1QL/QueryClient.cs#L387

      So, basically, once the client considers the query node down it will never use it again (except maybe if there's a rebalance?)

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        For Gerrit Dashboard: NCBC-1291
        # Subject Branch Project Status CR V

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            btburnett3 Brant Burnett
            jmorris Jeff Morris
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            Dates

              Created:
              Updated:
              Resolved:

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