Document the various connection modes

XMLWordPrintableJSON

    • Type: Question
    • Resolution: Done
    • Priority: Major - P3
    • None
    • Affects Version/s: None
    • Component/s: Documentation
    • None
    • Hide

      1. What would you like to communicate to the user about this feature?
      2. Would you like the user to see examples of the syntax and/or executable code and its output?
      3. Which versions of the driver/connector does this apply to?

      Show
      1. What would you like to communicate to the user about this feature? 2. Would you like the user to see examples of the syntax and/or executable code and its output? 3. Which versions of the driver/connector does this apply to?
    • None
    • None
    • None
    • None
    • None
    • None

      I used only one slave server in connection settings from the configured replica set:

      rs.status()
      { 
    "myState" : 2, 
    "members" : [
        { "name" : "localhost:31500", "state" : 1, "stateStr" : "PRIMARY", ... }, 
        { "name" : "localhost:31502", "state" : 7, "stateStr" : "ARBITER", ... }, 
        { "name" : "localhost:31501", "state" : 2, "stateStr" : "SECONDARY", ... } ], ...
}

      Test code:

      Unable to find source-code formatter for language: csharp. Available languages are: actionscript, ada, applescript, bash, c, c#, c++, cpp, css, erlang, go, groovy, haskell, html, java, javascript, js, json, lua, none, nyan, objc, perl, php, python, r, rainbow, ruby, scala, sh, sql, swift, visualbasic, xml, yaml
      var client = new MongoClient(new MongoClientSettings
	{
		ConnectionMode = ConnectionMode.Automatic,
		Servers = new []{ MongoServerAddress.Parse("localhost:31501")}
	});
var result = client.GetDatabase("test").RunCommand<BsonDocument>(new BsonDocument() { { "connectionStatus", 1 } });

      I get an exception:

      System.TimeoutException: A timeout occured after 30000ms selecting a server using CompositeServerSelector{ Selectors = ReadPreferenceServerSelector{ ReadPreference = { Mode = Primary, TagSets = [] } }, LatencyLimitingServerSelector{ AllowedLatencyRange = 00:00:00.0150000 } }. Client view of cluster state is { ClusterId : "6", ConnectionMode : "Automatic", Type : "ReplicaSet", State : "Connected", Servers : [{ ServerId: "{ ClusterId : 6, EndPoint : "Unspecified/localhost:31502" }", EndPoint: "Unspecified/localhost:31502", State: "Connected", Type: "ReplicaSetArbiter", WireVersionRange: "[0, 3]" }] }.
   at MongoDB.Driver.Core.Clusters.Cluster.ThrowTimeoutException(IServerSelector selector, ClusterDescription description)
   at MongoDB.Driver.Core.Clusters.Cluster.WaitForDescriptionChangedHelper.HandleCompletedTask(Task completedTask)
   at MongoDB.Driver.Core.Clusters.Cluster.WaitForDescriptionChanged(IServerSelector selector, ClusterDescription description, Task descriptionChangedTask, TimeSpan timeout, CancellationToken cancellationToken)
   at MongoDB.Driver.Core.Clusters.Cluster.SelectServer(IServerSelector selector, CancellationToken cancellationToken)
   at MongoDB.Driver.Core.Bindings.ReadPreferenceBinding.GetReadChannelSource(CancellationToken cancellationToken)
   at MongoDB.Driver.Core.Operations.ReadCommandOperation`1.Execute(IReadBinding binding, CancellationToken cancellationToken)
   at MongoDB.Driver.OperationExecutor.ExecuteReadOperation[TResult](IReadBinding binding, IReadOperation`1 operation, CancellationToken cancellationToken)
   at MongoDB.Driver.MongoDatabaseImpl.ExecuteReadOperation[T](IReadOperation`1 operation, ReadPreference readPreference, CancellationToken cancellationToken)
   at MongoDB.Driver.MongoDatabaseImpl.RunCommand[TResult](Command`1 command, ReadPreference readPreference, CancellationToken cancellationToken)

      But if you specify another server name, the connection is established.

      Unable to find source-code formatter for language: csharp. Available languages are: actionscript, ada, applescript, bash, c, c#, c++, cpp, css, erlang, go, groovy, haskell, html, java, javascript, js, json, lua, none, nyan, objc, perl, php, python, r, rainbow, ruby, scala, sh, sql, swift, visualbasic, xml, yaml
      var client = new MongoClient(new MongoClientSettings
	{
		ConnectionMode = ConnectionMode.Automatic,
		Servers = new []{ MongoServerAddress.Parse("localhost:31501"), MongoServerAddress.Parse("unknown") }
	});
var result = client.GetDatabase("test").RunCommand<BsonDocument>(new BsonDocument() { { "connectionStatus", 1 } });

      But it does not work if I connect to a single server:

      • localhost:30000 - standalone
      Unable to find source-code formatter for language: csharp. Available languages are: actionscript, ada, applescript, bash, c, c#, c++, cpp, css, erlang, go, groovy, haskell, html, java, javascript, js, json, lua, none, nyan, objc, perl, php, python, r, rainbow, ruby, scala, sh, sql, swift, visualbasic, xml, yaml
      var client = new MongoClient(new MongoClientSettings
	{
		ConnectionMode = ConnectionMode.Automatic,
		Servers = new []{ MongoServerAddress.Parse("localhost:30000"), MongoServerAddress.Parse("unknown") }
	});
var result = client.GetDatabase("test").RunCommand<BsonDocument>(new BsonDocument() { { "connectionStatus", 1 } });

      How to connect with automatic mode to a variable number of servers?

            Assignee:
            Unassigned
            Reporter:
            Anatoliy Koperin
            Votes:
            0 Vote for this issue
            Watchers:
            1 Start watching this issue

              Created:
              Updated:
              Resolved: