我一直在尝试编写UDAF来计算加权平均值。我以类似于现有UDAF的方式编写了用于计算平均值的方法，但它似乎只能在我的本地计算机上运行。我不确定发生了什么问题。...有人遇到了类似的问题吗？
以下是生成的错误:
java.lang.RuntimeException: Error in configuring object
at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:93)
at org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:64)
at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:117)
at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:413)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:348)
at org.apache.hadoop.mapred.Child$4.run(Child.java:270)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:415)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1127)
at org.apache.hadoop.mapred.Child.main(Child.java:264)
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:88)
... 9 more
Caused by: java.lang.RuntimeException: Error in configuring object
at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:93)
at org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:64)
at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:117)
at org.apache.hadoop.mapred.MapRunner.configure(MapRunner.java:34)
... 14 more
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:88)
... 17 more
Caused by: java.lang.RuntimeException: Map operator initialization failed
at org.apache.hadoop.hive.ql.exec.ExecMapper.configure(ExecMapper.java:121)
... 22 more
Caused by: java.lang.NullPointerException
at org.apache.hadoop.hive.ql.exec.GroupByOperator.initializeOp(GroupByOperator.java:325)
at org.apache.hadoop.hive.ql.exec.Operator.initialize(Operator.java:360)
at org.apache.hadoop.hive.ql.exec.Operator.initialize(Operator.java:436)
at org.apache.hadoop.hive.ql.exec.Operator.initializeChildren(Operator.java:392)
at org.apache.hadoop.hive.ql.exec.SelectOperator.initializeOp(SelectOperator.java:62)
at org.apache.hadoop.hive.ql.exec.Operator.initialize(Operator.java:360)
at org.apache.hadoop.hive.ql.exec.Operator.initialize(Operator.java:436)
at org.apache.hadoop.hive.ql.exec.Operator.initializeChildren(Operator.java:392)
at org.apache.hadoop.hive.ql.exec.TableScanOperator.initializeOp(TableScanOperator.java:166)
at org.apache.hadoop.hive.ql.exec.Operator.initialize(Operator.java:360)
at org.apache.hadoop.hive.ql.exec.MapOperator.initializeOp(MapOperator.java:441)
at org.apache.hadoop.hive.ql.exec.Operator.initialize(Operator.java:360)
at org.apache.hadoop.hive.ql.exec.ExecMapper.configure(ExecMapper.java:98)
... 22 more
最佳答案
我解决了问题..似乎存在一些jar文件问题...每当我导出某些更改时，某些更改就可以工作，而某些更改则不行，所以我猜答案是每次您计划添加时都终止您的配置单元 session 一个jar文件! :/奇怪，但是有效...