我正在使用H2O统计套件的R版本，并且正在尝试使用mojo保存和加载模型。我使用h2o.saveMojo(object = h2o_gbm_model,path = "./models/", force = TRUE)保存了受过训练的gbm，使用h2o.loadModel加载时收到以下错误：
ERROR: Unexpected HTTP Status code: 400 Bad Request (url = http://localhost:54321/99/Models.bin/)
java.lang.IllegalArgumentException
[1] "java.lang.IllegalArgumentException: Missing magic number 0x1CED at stream start"
[2] " water.AutoBuffer.<init>(AutoBuffer.java:269)"
[3] " hex.Model.importBinaryModel(Model.java:2477)"
[4] " water.api.ModelsHandler.importModel(ModelsHandler.java:209)"
[5] " sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)"
[6] " sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)"
[7] " sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)"
[8] " java.lang.reflect.Method.invoke(Method.java:498)"
[9] " water.api.Handler.handle(Handler.java:60)"
[10] " water.api.RequestServer.serve(RequestServer.java:483)"
[11] " water.api.RequestServer.doGeneric(RequestServer.java:327)"
[12] " water.api.RequestServer.doPost(RequestServer.java:253)"
[13] " javax.servlet.http.HttpServlet.service(HttpServlet.java:755)"
[14] " javax.servlet.http.HttpServlet.service(HttpServlet.java:848)"
[15] " org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:684)"
[16] " org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:501)"
[17] " org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1086)"
[18] " org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:427)"
[19] " org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1020)"
[20] " org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135)"
[21] " org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:154)"
[22] " org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116)"
[23] " water.webserver.jetty8.Jetty8ServerAdapter$LoginHandler.handle(Jetty8ServerAdapter.java:119)"
[24] " org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:154)"
[25] " org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116)"
[26] " org.eclipse.jetty.server.Server.handle(Server.java:370)"
[27] " org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:494)"
[28] " org.eclipse.jetty.server.BlockingHttpConnection.handleRequest(BlockingHttpConnection.java:53)"
[29] " org.eclipse.jetty.server.AbstractHttpConnection.content(AbstractHttpConnection.java:984)"
[30] " org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.content(AbstractHttpConnection.java:1045)"
[31] " org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:861)"
[32] " org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:236)"
[33] " org.eclipse.jetty.server.BlockingHttpConnection.handle(BlockingHttpConnection.java:72)"
[34] " org.eclipse.jetty.server.bio.SocketConnector$ConnectorEndPoint.run(SocketConnector.java:264)"
[35] " org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:608)"
[36] " org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:543)"
[37] " java.lang.Thread.run(Thread.java:745)"
Error in .h2o.doSafeREST(h2oRestApiVersion = h2oRestApiVersion, urlSuffix = page, :
ERROR MESSAGE:
Missing magic number 0x1CED at stream start
此外，我的会话信息如下：
> sessionInfo()
R version 3.5.3 (2019-03-11)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 10 x64 (build 17763)
Matrix products: default
locale:
[1] LC_COLLATE=Italian_Italy.1252 LC_CTYPE=Italian_Italy.1252 LC_MONETARY=Italian_Italy.1252
[4] LC_NUMERIC=C LC_TIME=Italian_Italy.1252
attached base packages:
[1] stats graphics grDevices utils datasets methods base
other attached packages:
[1] caret_6.0-84 lattice_0.20-38 ModelMetrics_1.2.2 h2o_3.24.0.3 data.table_1.12.2 dtplyr_0.0.3
[7] forcats_0.4.0 stringr_1.4.0 dplyr_0.8.0.1 purrr_0.3.2 readr_1.3.1 tidyr_0.8.3
[13] tibble_2.1.1 ggplot2_3.1.1 tidyverse_1.2.1
loaded via a namespace (and not attached):
[1] Rcpp_1.0.1 lubridate_1.7.4 class_7.3-15 digest_0.6.18 assertthat_0.2.1 packrat_0.5.0
[7] ipred_0.9-9 foreach_1.4.4 R6_2.4.0 cellranger_1.1.0 plyr_1.8.4 backports_1.1.4
[13] stats4_3.5.3 httr_1.4.0 pillar_1.4.0 rlang_0.3.4 lazyeval_0.2.2 readxl_1.3.1
[19] rstudioapi_0.10 rpart_4.1-15 Matrix_1.2-17 labeling_0.3 splines_3.5.3 gower_0.2.0
[25] RCurl_1.95-4.12 munsell_0.5.0 broom_0.5.2 compiler_3.5.3 modelr_0.1.4 pkgconfig_2.0.2
[31] nnet_7.3-12 tidyselect_0.2.5 prodlim_2018.04.18 codetools_0.2-16 crayon_1.3.4 withr_2.1.2
[37] MASS_7.3-51.3 bitops_1.0-6 recipes_0.1.5 grid_3.5.3 nlme_3.1-137 jsonlite_1.6
[43] gtable_0.3.0 magrittr_1.5 scales_1.0.0 cli_1.1.0 stringi_1.4.3 reshape2_1.4.3
[49] timeDate_3043.102 xml2_1.2.0 generics_0.0.2 lava_1.6.5 iterators_1.0.10 tools_3.5.3
[55] glue_1.3.1 hms_0.4.2 parallel_3.5.3 survival_2.44-1.1 colorspace_1.4-1 rvest_0.3.3
[61] haven_2.1.0