plan(multisession) errors with parallel_over = "everything"

[rfsaldanha]

When tuning with tune_race_anova with parallelism using future::plan(multisession), I get Error: object 'iteration' not found.

library(tidymodels)
library(finetune)
library(discrim)
#> 
#> Attaching package: 'discrim'
#> The following object is masked from 'package:dials':
#> 
#>     smoothness
library(future)

data(two_class_dat, package = "modeldata")

set.seed(1)
rs <- bootstraps(two_class_dat, times = 10)

rda_spec <-
  discrim_regularized(frac_common_cov = tune(), frac_identity = tune()) %>%
  set_engine("klaR")

grid <-
  rda_spec %>%
  extract_parameter_set_dials() %>%
  grid_max_entropy(size = 20)

ctrl <- control_race(verbose_elim = TRUE)

set.seed(4)

plan(multisession)

grid_anova <- 
  rda_spec %>% 
  tune_race_anova(Class ~ ., resamples = rs, grid = grid, control = ctrl)
#> ℹ Evaluating against the initial 3 burn-in resamples.
#> Error: object 'iteration' not found

^{Created on 2024-04-10 with reprex v2.1.0}

With plan(sequential) I get no errors.

[simonpcouch]

Thank you for the reprex—I can reproduce!

[simonpcouch]

Ah, looks like parallel_over = "everything" is the real kicker here:

library(tidymodels)
library(future)

plan(multisession)

set.seed(1)
grid_res <- 
  tune_grid(
    logistic(engine = "glmnet", penalty = tune()), 
    Class ~ ., 
    resamples = bootstraps(two_class_dat, times = 10), 
    control = control_grid(parallel_over = "everything")
  )
#> Error: object 'iteration' not found

^{Created on 2024-04-17 with reprex v2.1.0}

Since I can replicate with tune only, will go ahead and transfer there.

[github-actions]

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