Question

我有一个应该在Azure数据湖中运行的Run Script R代码。在Azure数据湖中安装R扩展后，我尝试为此使用u-SQL，但是当我运行U-SQL脚本时，我遇到了下面的错误。任何人都可以协助解决以下问题。我被困在一个月左右。

REFERENCE ASSEMBLY [ExtR];   //enable R extensions for the U-SQL Script

//declare the R script as a string variable and pass it as a parameter to the Reducer:
DECLARE @myRScript = @"
temp = inputFromUSQL
temp$mynewcol = ncol(temp)  
outputToUSQL = temp
";


DECLARE @myInputFile string  = @"/dev/iris.csv";
DECLARE @myOutputFile string = @"/dev/outex1.txt";

@InputIrisData = EXTRACT 
sepal_length string,
sepal_width string,
petal_length string,
petal_width string,
species string  
FROM @myInputFile
USING Extractors.Csv(skipFirstNRows: 1);


@ExtendedData = SELECT 
0 AS Par,    // pseudo partition
*
FROM @InputIrisData;

//Column names and types must be same in usql and r scripts
@RScriptOutput = REDUCE @ExtendedData ON Par PRODUCE 
Par, 
RowId int,
ROutput string
USING new Extension.R.Reducer(command:@myRScript, rReturnType:"charactermatrix");

//OUTPUT @RScriptOutput TO @myOutputFile USING Outputters.Tsv();    
OUTPUT @RScriptOutput TO @myOutputFile USING Outputters.Csv(outputHeader : true, quoting:false);  //if want the headers as well

错误：

====捕获的异常RDotNet.EvaluationException

在RDotNet.REngine.Parse中

（字符串语句，StringBuilder incompleteStatement）在RDotNet.REngine.d__0.MoveNext（）在System.Linq.Enumerable.LastOrDefault [TSource]（IEnumerable`1源）处在RDotNet.REngine.Evaluate（String语句）在Extension.R.RDriver.RunRCode（REngine rEngine，字符串rText，RTextTypes rTextType，布尔isReturnTypeDataFrame）在C：\ agent_1 \ USqlExtensions \ lang \ R \ ExtR \ RDriver.cs：第125行在Extension：R.RDriver.PrepareEnvironmentRunRCode（）中的C：\ agent_1 \ USqlExtensions \ lang \ R \ ExtR \ RDriver.cs：第148行在Extension.R.UsqlHelperFunctions.d__2.MoveNext（）我 C：\ agent_1 \ USqlExtensions \ lang \ R \ ExtR \ UsqlHelperFunctions.cs：第73行在ScopeEngine.RunUdoCodeExceptionhandled> （ScopeTypedManagedHandle * className，SByte * methodName， *代码） d：\ data \ yarnnm \ local \ usercache \ 34c0a3b0-a710-4367-b2b7-3bb36d9fa3ba \ appcache \ application_1546151044065_290541 \ container_e290_1546151044065_290541_01_000001 \ wd \ managed.h：line 2034

在Azure数据湖U-SQL中运行R代码错误

0 个答案: