private Topology GetTopology(ClusterRequestExecutor requestExecutor)
{
Topology topology = null;
try
{
topology = requestExecutor.Topology;
if (topology == null)
{
// a bit rude way to make sure that topology has been refreshed
// but it handles a case when first topology update failed
using (requestExecutor.ContextPool.AllocateOperationContext(out var context))
{
var operation = new GetBuildNumberOperation();
var command = operation.GetCommand(requestExecutor.Conventions, context);
requestExecutor.Execute(command, context);
}
topology = requestExecutor.Topology;
}
}
catch
{
// ignored
}
if (topology == null)
{
throw new InvalidOperationException("Could not fetch the topology.");
}
return(topology);
}