[jira] [Comment Edited] (HIVE-14555) JDBC:ClassNotFoundException when executing a map join query with UDF

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

    [ https://issues.apache.org/jira/browse/HIVE-14555?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15423962#comment-15423962 ] 

hizero edited comment on HIVE-14555 at 8/17/16 6:12 AM:
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I add cloningQueryPlanKryo.remove() in function deserializePlan so that cloningQueryPlanKryo will be reinitialized at runtime.


was (Author: hizero):
I add cloningQueryPlanKryo.remove() in funcition deserializePlan so that cloningQueryPlanKryo will be reinitialized at runtime.

> JDBC:ClassNotFoundException when executing a map join query with UDF
> --------------------------------------------------------------------
>
>                 Key: HIVE-14555
>                 URL: https://issues.apache.org/jira/browse/HIVE-14555
>             Project: Hive
>          Issue Type: Bug
>          Components: Query Planning
>    Affects Versions: 1.1.0
>            Reporter: hizero
>            Assignee: hizero
>             Fix For: 1.1.0
>
>         Attachments: hive_exec_Utilities.patch
>
>
> when I submit a map join query with UDF using JDBC  and sometimes it throws:
> Error while compiling statement: FAILED: SemanticException Generate Map Join Task Error: Unable to find class: com.kingnetdc.hive.udf.FilterByMap Serialization trace: genericUDF (org.apache.hadoop.hive.ql.plan.ExprNodeGenericFuncDesc) colExprMap (org.apache.hadoop.hive.ql.exec.SelectOperator) childOperators (org.apache.hadoop.hive.ql.exec.FilterOperator) childOperators (org.apache.hadoop.hive.ql.exec.JoinOperator) reducer (org.apache.hadoop.hive.ql.plan.ReduceWork) reduceWork (org.apache.hadoop.hive.ql.plan.MapredWork)
>  I have found the fact that it fails at cloning plan when invoking Utilities.deserializePlan.
> An existing thread deals with the query and its static threadlocal variable,cloningQueryPlanKryo has been initialed at most once per thread.When this thread registered UDF setting in aux_jar_paths  it wont reinitialize the cloningQueryPlanKryo.



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