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via Google Groups by Denis Perevalov, 1 year ago
water.exceptions.H2OIllegalArgumentException: unimplemented	at water.H2O.unimpl(H2O.java:921)	at water.rapids.ast.prims.advmath.AstTable$SlowCnt.reduce(AstTable.java:308)	at water.rapids.ast.prims.advmath.AstTable$SlowCnt.reduce(AstTable.java:264)	at water.MRTask.reduce4(MRTask.java:743)	at water.MRTask.reduce3(MRTask.java:730)	at water.MRTask.postLocal0(MRTask.java:698)	at water.MRTask.onCompletion(MRTask.java:670)	at jsr166y.CountedCompleter.__tryComplete(CountedCompleter.java:425)	at water.RPC$2.compute2(RPC.java:623)	at water.H2O$H2OCountedCompleter.compute(H2O.java:1196)	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)