Hive UDF函数报错，类路径中没有UDF函数的路径

mzm1991 2017-07-13 07:53:33

这两天遇到了一个比较诡异的问题，就是编辑Hive的UDF函数，并提交需要执行MapReduce的SQL后，提示报错
org.apache.hadoop.hive.ql.exec.UDFArgumentException: The UDF implementation class 'xxxxx' is not present inthe class path
具体代码如下

```
```
package com.mzm.transformer.hive;

import com.mzm.common.GlobalConstants;
import com.mzm.utils.JdbcManager;
import org.apache.commons.lang.StringUtils;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hive.ql.exec.UDF;
import org.apache.hadoop.io.IntWritable;
import org.apache.hadoop.io.Text;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.LinkedHashMap;
import java.util.Map;

/**
* 获取订单信息的UDF
* Created by Administrator on 2017/7/12.
*/
public class OrderInfoUDF extends UDF {
.......
}

```
具体报错信息如下：

```
hive (default)> select order_information(oid,'pl') as pl,from_unixtime(cast(s_time/1000 as bigint),'yyyy-MM-dd') as date,order_information(oid,'cut') as cut,order_information(oid,'pt') as pt,count(distinct oid) as orders from event_logs where en='e_cs' and pl is not null and s_time>=unix_timestamp('2017-07-05','yyyy-MM-dd')*1000 and s_time<unix_timestamp('2017-07-06','yyyy-MM-dd')*1000 group by order_information(oid,'pl'),from_unixtime(cast(s_time/1000 as bigint),'yyyy-MM-dd'),order_information(oid,'cut'),order_information(oid,'pt');

Diagnostic Messages for this Task:
Error: java.lang.RuntimeException: Error in configuring object
at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:109)
at org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:75)
at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:133)
at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:446)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:343)
at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:168)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:422)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1642)
at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:163)
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:106)
... 9 more
Caused by: java.lang.RuntimeException: Error in configuring object
at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:109)
at org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:75)
at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:133)
at org.apache.hadoop.mapred.MapRunner.configure(MapRunner.java:38)
... 14 more
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:106)
... 17 more
Caused by: java.lang.RuntimeException: Map operator initialization failed
at org.apache.hadoop.hive.ql.exec.mr.ExecMapper.configure(ExecMapper.java:157)
... 22 more
Caused by: org.apache.hadoop.hive.ql.exec.UDFArgumentException: The UDF implementation class 'com.mzm.transformer.hive.OrderInfoUDF' is not present in the class path
at org.apache.hadoop.hive.ql.udf.generic.GenericUDFBridge.initialize(GenericUDFBridge.java:143)
at org.apache.hadoop.hive.ql.udf.generic.GenericUDF.initializeAndFoldConstants(GenericUDF.java:116)
at org.apache.hadoop.hive.ql.exec.ExprNodeGenericFuncEvaluator.initialize(ExprNodeGenericFuncEvaluator.java:127)
at org.apache.hadoop.hive.ql.exec.GroupByOperator.initializeOp(GroupByOperator.java:216)
at org.apache.hadoop.hive.ql.exec.Operator.initialize(Operator.java:376)
at org.apache.hadoop.hive.ql.exec.Operator.initialize(Operator.java:460)
at org.apache.hadoop.hive.ql.exec.Operator.initializeChildren(Operator.java:416)
at org.apache.hadoop.hive.ql.exec.SelectOperator.initializeOp(SelectOperator.java:65)
at org.apache.hadoop.hive.ql.exec.Operator.initialize(Operator.java:376)
at org.apache.hadoop.hive.ql.exec.Operator.initialize(Operator.java:460)
at org.apache.hadoop.hive.ql.exec.Operator.initializeChildren(Operator.java:416)
at org.apache.hadoop.hive.ql.exec.FilterOperator.initializeOp(FilterOperator.java:83)
at org.apache.hadoop.hive.ql.exec.Operator.initialize(Operator.java:376)
at org.apache.hadoop.hive.ql.exec.Operator.initialize(Operator.java:460)
at org.apache.hadoop.hive.ql.exec.Operator.initializeChildren(Operator.java:416)
at org.apache.hadoop.hive.ql.exec.TableScanOperator.initializeOp(TableScanOperator.java:189)
at org.apache.hadoop.hive.ql.exec.Operator.initialize(Operator.java:376)
at org.apache.hadoop.hive.ql.exec.MapOperator.initializeOp(MapOperator.java:427)
at org.apache.hadoop.hive.ql.exec.Operator.initialize(Operator.java:376)
at org.apache.hadoop.hive.ql.exec.mr.ExecMapper.configure(ExecMapper.java:136)
... 22 more

FAILED: Execution Error, return code 2 from org.apache.hadoop.hive.ql.exec.mr.MapRedTask
MapReduce Jobs Launched:
Stage-Stage-1: Map: 1 Reduce: 1 HDFS Read: 0 HDFS Write: 0 FAIL
Total MapReduce CPU Time Spent: 0 msec

```
jar包也打了好几次了，都是报一样的错误，但是只有这个UDF函数报错，其他的UDF函数就没有问题，能正常执行HQL（无论是否需要MapReduce），甚至是使用这个UDF函数执行诸如select order_info(oid) from event_logs这类无需MapReduce的HQL，都能正常执行，但就执行是需要MapReduce的HQL报错。

被这个问题给折腾死了，求各位大神帮忙看看

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