Pig用户定义函数（UDF）调用SOAP Web服务客户端

Question

是否可以编写一个调用Java编写的SOAP Web服务的Pig UDF？我在下面运行Pig代码时出现语法错误。 UDF调用Soap Web服务客户端。

Pig Script：

register CalculatorWS_Client_Application.jar; 
A = LOAD 'student_data.txt' AS (name: chararray, age: int, gpa: float);
B = FOREACH A GENERATE calculatorws_client_application.CalculateUDF(name);
Dump B;

错误：

Failed to parse: Pig script failed to parse: <file script.pig, line 3, column 23> Failed to generate logical plan. Nested exception:        org.apache.pig.backend.executionengine.ExecException: ERROR 1069: Problem resolving class version numbers for class calculatorws_client_application.CalculateUDF ....

Caused by: org.apache.pig.backend.executionengine.ExecException: ERROR 1069: Problem resolving class version numbers for class calculatorws_client_application.CalculateUDF ...

Caused by: java.lang.UnsupportedClassVersionError: calculatorws_client_application/CalculateUDF : Unsupported major.minor version 52.0

2014-11-19 18:41:37,075 [main] ERROR org.apache.pig.tools.grunt.Grunt - ERROR 1069: Problem resolving class version numbers for class calculatorws_client_application.CalculateUDF

Answer 1

看起来像java版本不匹配 在控制台上键入java -version并查看它打印的版本。 您还可以使用sudo update-alternatives --config java并设置所需的版本。