[jira] [Commented] (HIVE-9073) NPE when using custom windowing UDAFs

["Jason Dere (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HIVE-9073?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14241898#comment-14241898 ] 

Jason Dere commented on HIVE-9073:
----------------------------------

Looks like the error may be occurring because the Hive is trying to look up the UDF by name during the UDF initialization in the reduce task. Ideally this lookup should only be happening during the compilation phase and not during the map/reduce tasks.  This looks like it works ok for built-in windowing UDFs (added to the FunctionRegistry), but custom UDFs are hitting some other logic that really should only happen during compilation. We would have to fix the way WindowingTableFunction is doing its initialization for this to work with UDFs added with ADD TEMP FUNCTION.

> NPE when using custom windowing UDAFs
> -------------------------------------
>
>                 Key: HIVE-9073
>                 URL: https://issues.apache.org/jira/browse/HIVE-9073
>             Project: Hive
>          Issue Type: Bug
>          Components: UDF
>            Reporter: Jason Dere
>            Assignee: Jason Dere
>
> From the hive-user email group:
> {noformat}
> While executing a simple select query using a custom windowing UDAF I created I am constantly running into this error.
>  
> 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.ReduceTask.runOldReducer(ReduceTask.java:409)
>         at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:392)
>         at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:168)
>         at java.security.AccessController.doPrivileged(Native Method)
>         at javax.security.auth.Subject.doAs(Subject.java:415)
>         at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1594)
>         at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:163)
> Caused by: java.lang.reflect.InvocationTargetException
>         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>         at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
>         at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>         at java.lang.reflect.Method.invoke(Method.java:606)
>         at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:106)
>         ... 9 more
> Caused by: java.lang.RuntimeException: Reduce operator initialization failed
>         at org.apache.hadoop.hive.ql.exec.mr.ExecReducer.configure(ExecReducer.java:173)
>         ... 14 more
> Caused by: java.lang.NullPointerException
>         at org.apache.hadoop.hive.ql.exec.FunctionRegistry.getFunctionInfo(FunctionRegistry.java:647)
>         at org.apache.hadoop.hive.ql.exec.FunctionRegistry.getWindowFunctionInfo(FunctionRegistry.java:1875)
>         at org.apache.hadoop.hive.ql.udf.ptf.WindowingTableFunction.streamingPossible(WindowingTableFunction.java:150)
>         at org.apache.hadoop.hive.ql.udf.ptf.WindowingTableFunction.setCanAcceptInputAsStream(WindowingTableFunction.java:221)
>         at org.apache.hadoop.hive.ql.udf.ptf.WindowingTableFunction.initializeStreaming(WindowingTableFunction.java:266)
>         at org.apache.hadoop.hive.ql.exec.PTFOperator$PTFInvocation.initializeStreaming(PTFOperator.java:292)
>         at org.apache.hadoop.hive.ql.exec.PTFOperator.initializeOp(PTFOperator.java:86)
>         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.ExtractOperator.initializeOp(ExtractOperator.java:40)
>         at org.apache.hadoop.hive.ql.exec.Operator.initialize(Operator.java:376)
>         at org.apache.hadoop.hive.ql.exec.mr.ExecReducer.configure(ExecReducer.java:166)
>         ... 14 more
>  
> Just wanted to check if any of you have faced this earlier. Also when I try to run the Custom UDAF on another server it works fine. The only difference I can see it that the hive version I am using on my local machine is 0.13.1 where it is working and on the other machine it is 0.13.0 where I see the above mentioned error. I am not sure if this was a bug which was fixed in the later release but I just wanted to confirm the same.
> {noformat}



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