no lock on dataset while the model is building

[exalate-issue-sync[bot]]

while building a model, go to the dataset and change a column type to get npe in the building model data- /Users/nidhimehta/h2o-3/bigdata/laptop/milsongs/milsongs-cls-train.csv" {code:java} buildModel 'gbm', {"model_id":"gbm-cd6b97db-3ec9-487f-a019-b74ca17f4878","training_frame":"milsongs_cls_train.hex","nfolds":0,"response_column":"C1","ignored_columns":[],"ignore_const_cols":true,"ntrees":50,"max_depth":5,"min_rows":10,"nbins":20,"nbins_cats":1024,"seed":3988775424555483000,"learn_rate":0.1,"distribution":"AUTO","sample_rate":1,"col_sample_rate":1,"col_sample_rate_per_tree":1,"score_each_iteration":false,"fold_assignment":"AUTO","balance_classes":false,"max_confusion_matrix_size":20,"max_hit_ratio_k":10,"r2_stopping":0.999999,"stopping_rounds":0,"stopping_metric":"AUTO","stopping_tolerance":0.001,"build_tree_one_node":false,"tweedie_power":1.5,"checkpoint":"","keep_cross_validation_predictions":false,"class_sampling_factors":[],"max_after_balance_size":5,"nbins_top_level":1024} {code}

{code:java} Got exception 'class java.lang.NullPointerException', with msg 'null' java.lang.NullPointerException at water.fvec.Vec.chunkForChunkIdx(Vec.java:853) at water.MRTask.compute2(MRTask.java:645) at water.H2O$H2OCountedCompleter.compute1(H2O.java:1060) at hex.tree.ScoreBuildHistogram$Icer.compute1(ScoreBuildHistogram$Icer.java) at water.H2O$H2OCountedCompleter.compute(H2O.java:1056) at jsr166y.CountedCompleter.exec(CountedCompleter.java:468) at jsr166y.ForkJoinTask.doExec(ForkJoinTask.java:263) at jsr166y.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:974) at jsr166y.ForkJoinPool.runWorker(ForkJoinPool.java:1477) at jsr166y.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:104) {code}

[DinukaH2O]

JIRA Issue Migration Info

Jira Issue: PUBDEV-2494 Assignee: New H2O Bugs Reporter: Nidhi Mehta State: Open Fix Version: N/A Attachments: N/A Development PRs: N/A