More R Services Internals Spelunking

Niels Berglund continues his series on R Services internals:

What happens is that straight after the AuthenticateConnection you will hit the WriteAsync breakpoint twice, the same way as we see in Code Snippet 4. The first hit at WriteAsync sort of makes sense, as it ties up with the call-stack we see in Code Snippet 5. But what about the second WriteAsync (the one that causes the second package to be sent), where does that come from? To try to figure that out, we start with the call-stack for that particular WriteAsync.

Execute the code in Code Snippet 1 again, and continue to the second WriteAsync. When you hit the breakpoint do a kc again. The call-stack should now look somewhat like this (this time it is the full call-stack):

It’s interesting the kind of stuff you can find with Wireshark and a debugger.

Related Posts

Plotting ML Results In R

Bernardo Lares shows off the plots he creates in R to compare ML models: Split and compare quantiles This parameter is the easiest to sell to the C-level guys. “Did you know that with this model, if we chop the worst 20% of leads we would have avoided 60% of the frauds and only lose […]

Read More

Scatterplots For Multivariate Analysis

Neil Saunders declutters a complicated visual with a simple scatterplot: Sydney’s congestion at ‘tipping point’ blares the headline and to illustrate, an interactive chart with bars for city population densities, points for commute times and of course, dual-axes. Yuck. OK, I guess it does show that Sydney is one of three cities that are low density, […]

Read More


October 2017
« Sep Nov »