java.lang.AssertionError: null while mapping key /var/folders/lh/0qt9w_d56xx1qwc4hqtjgycw0000gn/T//RtmpXHUo3I/file1fd01afe64.csv

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java.lang.AssertionError: null while mapping key /var/folders/lh/0qt9w_d56xx1qwc4hqtjgycw0000gn/T//RtmpXHUo3I/file1fd01afe64.csv
at water.fvec.NewChunk.compress2(NewChunk.java:571)
at water.fvec.NewChunk.compress(NewChunk.java:446)
at water.fvec.NewChunk.new_close(NewChunk.java:344)
at water.fvec.Chunk.close(Chunk.java:157)
at water.fvec.ParseDataset2$FVecDataOut.close(ParseDataset2.java:708)
at water.fvec.ParseDataset2$MultiFileParseTask$DParse.map(ParseDataset2.java:618)
at water.MRTask2.compute2(MRTask2.java:388)
at water.MRTask2.exec(MRTask2.java:237)
at water.MRTask2.exec(MRTask2.java:227)
at water.fvec.ParseDataset2$MultiFileParseTask.map(ParseDataset2.java:483)
at water.MRTask.lcompute(MRTask.java:75)
at water.DRemoteTask.compute2(DRemoteTask.java:91)
at water.H2O$H2OCountedCompleter.compute(H2O.java:710)
at jsr166y.CountedCompleter.exec(CountedCompleter.java:429)
at jsr166y.ForkJoinTask.doExec(ForkJoinTask.java:263)
at jsr166y.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:974)
at jsr166y.ForkJoinPool.runWorker(ForkJoinPool.java:1477)
at jsr166y.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:104)

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