0

For my first use of Package H2o on Rstudio, I received the following message for Ridge model

Error: water.exceptions.H2OConcurrentModificationException: Rollups not possible, because Vec was deleted

Here is the code I used and unfortunately I can't share my database because it is confidential

library(h2o)
h2o.init(nthreads = -1) 
h2o.no_progress()                    
learn.h2o<-as.h2o(learn_preppeds)   
test.h2o<-as.h2o(test_preppeds)
Lambda<- 10^seq(-3, 3, length = 100)
x <- setdiff(colnames(learn.h2o), c("NBCLAIM", "Offset")) 
y <- "NBCLAIM"      # Target variable
offset <- "Offset"  # log(exposure)
glm_fit_ridge<-h2o.glm(  
x = x,   
y = y,                                            
offset_column = offset,  
training_frame = learn.h2o,  
validation_frame = test.h2o,  
family = "poisson",  
link = 'log',
nfolds= 10, # 10 fold cross-validation  
alpha = 0,  
lambda =Lambda,  
interactions= interactions_list, 
keep_cross_validation_predictions = TRUE,  
seed = 2    # For reproducibility)
desertnaut
  • 57,590
  • 26
  • 140
  • 166
HAYAT SABIR
  • 1
  • 1

1 Answers1

0

Most likely a bug in h2o. Yesterday, there was a new fix release so if you can, I'd suggest upgrading to the newest version. Note that not all versions end up on CRAN (h2o releases more frequently than recommended on CRAN) so you can install the new version from here.

If that doesn't help, you can file a bug report as described here.

There might also be a chance that you could mitigate the issue by changing the solver but in this case, it would still be nice if you'd file a bug report (so it gets fixed). Ideally with more details, e.g., stack trace from the Java backend (might be printed in the error message in RStudio and definitely is in the logs).

David Lee
  • 665
  • 7
  • 20
Tomáš Frýda
  • 546
  • 3
  • 8
  • Hello, I tried your suggestion to download h2o from the link you gave me ''' ''' but I got this error – HAYAT SABIR Jul 09 '21 at 15:21
  • package or namespace load failed for ‘h2o’ in get(method, envir = home): lazy-load database 'C:/Users/Documents/R/win-library/4.0/h2o/R/h2o.rdb' is corrupt De plus : Warning messages: 1: In .registerS3method(fin[i, 1], fin[i, 2], fin[i, 3], fin[i, 4], : redémarrage de l'évaluation d'une promesse interrompue 2: In get(method, envir = home) : redémarrage de l'évaluation d'une promesse interrompue 3: In get(method, envir = home) : internal error -5 in R_decompress1 – HAYAT SABIR Jul 09 '21 at 15:26
  • It looks to me like there is a problem during the installation. I'd suggest to restart the R session and try again. Also it is possible that h2o is loaded on load for whatever reason so it might be worth trying to "Session -> Clear workspace..." before the installation. If it still doesn't work try installing it in vanilla R session (run in CMD `R --vanilla`), that should ensure that nothing gets preloaded before the installation which seems to me was the cause. – Tomáš Frýda Jul 12 '21 at 08:14