Plumber-Tableou App Failure on Connect Marketplace Testing Instances

[ChaitaC]

The plumber-tableau app, which runs successfully on the Dogfood server, fails to operate on the marketplace testing instance. Can this be related to missing dependencies, firewall configurations, or other environmental factors? The error in the logs is not intuitive.

Test app code

library(plumber)
library(plumbertableau)
library(outForest)
library(dplyr)

#* @apiTitle Outlier Detection for Tableau
#* @apiDescription Detect outliers in real-time on Tableau data using a Random Forest

#* Calculate outliers on input data
#* @tableauArg sales:numeric Numeric values representing sales for a given transaction
#* @tableauArg profit:numeric Numeric values representing profit for a given transaction
#* @tableauReturn logical A vector indicating the outlier status of each original observation
#* @post /detect-outliers
function(sales, profit) {
  dat <- tibble(sales, profit)
  out <- outForest(dat)
  outlier_rows <- outliers(out) %>%
    select(row) %>%
    distinct()

  dat %>%
    mutate(row = 1:n(),
           outlier = row %in% outlier_rows$row) %>%
    pull(outlier)
}

#* @plumber
tableau_extension

The same app failed to run on the Marketplace testing instance

Error in the log

2023/12/22 10:45:01 AM: Running plumber API at http://127.0.0.1:45949
2023/12/22 10:45:01 AM: Running swagger Docs at http://127.0.0.1:45949/__docs__/
2023/12/22 10:45:01 AM: Error in run_now(check_time, all = FALSE) : 
2023/12/22 10:45:01 AM:   Not compatible with requested type: [type=list; target=raw].
2023/12/22 10:45:01 AM: Calls:  -> invokeCppCallback
2023/12/22 10:47:00 AM: [rsc-session] Received signal: interrupt
2023/12/22 10:47:00 AM: [rsc-session] Terminating subprocess with interrupt ...
2023/12/22 10:47:01 AM:
2023/12/22 10:47:01 AM:
2023/12/22 10:47:01 AM: Execution halted
2023/12/22 10:47:01 AM: Plumber API exiting ...
2023/12/22 10:47:01 AM: [rsc-session] Terminated subprocess with signal: interrupt