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java.lang.ArrayIndexOutOfBoundsException: 4	at hex.genmodel.GenModel.KMeans_distance(GenModel.java:426)	at hex.kmeans.KMeans.closest(KMeans.java:748)	at hex.kmeans.KMeans.minSqr(KMeans.java:736)	at hex.kmeans.KMeans.recluster(KMeans.java:787)	at hex.kmeans.KMeans.access$600(KMeans.java:24)	at hex.kmeans.KMeans$KMeansDriver.initial_centers(KMeans.java:157)	at hex.kmeans.KMeans$KMeansDriver.computeImpl(KMeans.java:269)	at hex.ModelBuilder$Driver.compute2(ModelBuilder.java:169)	at water.H2O$H2OCountedCompleter.compute(H2O.java:1220)	at jsr166y.CountedCompleter.exec(CountedCompleter.java:468)	at jsr166y.ForkJoinTask.doExec(ForkJoinTask.java:263)	at jsr166y.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:974)	at jsr166y.ForkJoinPool.runWorker(ForkJoinPool.java:1477)	at jsr166y.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:104)