I am running the following code in R
library(h2o)
h2o.init()
df <- as.h2o(diamonds)
and get back the following error:
ERROR: Unexpected HTTP Status code: 412 Precondition Failed (url = http://localhost:54321/3/Parse)
water.exceptions.H2OIllegalArgumentException
[1] "water.exceptions.H2OIllegalArgumentException: Provided column type ordered is unknown. Cannot proceed with parse due to invalid argument."
[2] " water.parser.ParseSetup.strToColumnTypes(ParseSetup.java:240)"
[3] " water.api.ParseHandler.parse(ParseHandler.java:21)"
[4] " sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)"
[5] " sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)"
[6] " sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)"
[7] " java.lang.reflect.Method.invoke(Method.java:498)"
[8] " water.api.Handler.handle(Handler.java:60)"
[9] " water.api.RequestServer.serve(RequestServer.java:462)"
[10] " water.api.RequestServer.doGeneric(RequestServer.java:295)"
[11] " water.api.RequestServer.doPost(RequestServer.java:221)"
[12] " javax.servlet.http.HttpServlet.service(HttpServlet.java:755)"
[13] " javax.servlet.http.HttpServlet.service(HttpServlet.java:848)"
[14] " org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:684)"
[15] " org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:501)"
[16] " org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1086)"
[17] " org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:427)"
[18] " org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1020)"
[19] " org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135)"
[20] " org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:154)"
[21] " org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116)"
[22] " water.webserver.jetty8.Jetty8ServerAdapter$LoginHandler.handle(Jetty8ServerAdapter.java:119)"
[23] " org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:154)"
[24] " org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116)"
[25] " org.eclipse.jetty.server.Server.handle(Server.java:370)"
[26] " org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:494)"
[27] " org.eclipse.jetty.server.BlockingHttpConnection.handleRequest(BlockingHttpConnection.java:53)"
[28] " org.eclipse.jetty.server.AbstractHttpConnection.content(AbstractHttpConnection.java:984)"
[29] " org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.content(AbstractHttpConnection.java:1045)"
[30] " org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:861)"
[31] " org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:236)"
[32] " org.eclipse.jetty.server.BlockingHttpConnection.handle(BlockingHttpConnection.java:72)"
[33] " org.eclipse.jetty.server.bio.SocketConnector$ConnectorEndPoint.run(SocketConnector.java:264)"
[34] " org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:608)"
[35] " org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:543)"
[36] " java.lang.Thread.run(Thread.java:748)"
Error in .h2o.doSafeREST(h2oRestApiVersion = h2oRestApiVersion, urlSuffix = page, :
ERROR MESSAGE:
Provided column type ordered is unknown. Cannot proceed with parse due to invalid argument.
It is not very clear what is wrong.
The diamonds dataset (at least the one from ggplot2) includes variables of the ordered class:
> str(diamonds)
Classes ‘tbl_df’, ‘tbl’ and 'data.frame': 53940 obs. of 10 variables:
$ carat : num 0.23 0.21 0.23 0.29 0.31 0.24 0.24 0.26 0.22 0.23 ...
$ cut : Ord.factor w/ 5 levels "Fair"<"Good"<..: 5 4 2 4 2 3 3 3 1 3 ...
$ color : Ord.factor w/ 7 levels "D"<"E"<"F"<"G"<..: 2 2 2 6 7 7 6 5 2 5 ...
$ clarity: Ord.factor w/ 8 levels "I1"<"SI2"<"SI1"<..: 2 3 5 4 2 6 7 3 4 5 ...
$ depth : num 61.5 59.8 56.9 62.4 63.3 62.8 62.3 61.9 65.1 59.4 ...
$ table : num 55 61 65 58 58 57 57 55 61 61 ...
$ price : int 326 326 327 334 335 336 336 337 337 338 ...
$ x : num 3.95 3.89 4.05 4.2 4.34 3.94 3.95 4.07 3.87 4 ...
$ y : num 3.98 3.84 4.07 4.23 4.35 3.96 3.98 4.11 3.78 4.05 ...
$ z : num 2.43 2.31 2.31 2.63 2.75 2.48 2.47 2.53 2.49 2.39 ...
> sapply(diamonds, class)
$carat
[1] "numeric"
$cut
[1] "ordered" "factor"
$color
[1] "ordered" "factor"
$clarity
[1] "ordered" "factor"
$depth
[1] "numeric"
$table
[1] "numeric"
$price
[1] "integer"
$x
[1] "numeric"
$y
[1] "numeric"
$z
[1] "numeric"
The error message seems to suggest that h2o does not support that class. You should convert them to a different class first, e.g. factor or character.