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https://issues.apache.org/jira/browse/HIVE-10462?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14510189#comment-14510189
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Laljo John Pullokkaran commented on HIVE-10462:
-----------------------------------------------
[~jcamachorodriguez] Since HiveOpConverter get instantiated for each query, you
could use a counter; may be follow the naming schema inp<input no>-counter.
> CBO (Calcite Return Path): Exception thrown in conversion to MapJoin
> --------------------------------------------------------------------
>
> Key: HIVE-10462
> URL: https://issues.apache.org/jira/browse/HIVE-10462
> Project: Hive
> Issue Type: Sub-task
> Components: CBO
> Reporter: Jesus Camacho Rodriguez
> Assignee: Jesus Camacho Rodriguez
> Fix For: 1.2.0
>
> Attachments: HIVE-10462.01.patch, HIVE-10462.patch
>
>
> When the return path is on, the mapjoin conversion optimization fails as some
> DS in the Join descriptor have not been initialized properly.
> The failure can be reproduced with auto_join4.q. In particular, the following
> Exception is thrown:
> {noformat}
> org.apache.hadoop.hive.ql.parse.SemanticException: Generate Map Join Task
> Error: null
> at
> org.apache.hadoop.hive.ql.optimizer.physical.CommonJoinTaskDispatcher.processCurrentTask(CommonJoinTaskDispatcher.java:516)
> at
> org.apache.hadoop.hive.ql.optimizer.physical.AbstractJoinTaskDispatcher.dispatch(AbstractJoinTaskDispatcher.java:179)
> at
> org.apache.hadoop.hive.ql.lib.TaskGraphWalker.dispatch(TaskGraphWalker.java:111)
> at
> org.apache.hadoop.hive.ql.lib.TaskGraphWalker.walk(TaskGraphWalker.java:180)
> at
> org.apache.hadoop.hive.ql.lib.TaskGraphWalker.startWalking(TaskGraphWalker.java:125)
> at
> org.apache.hadoop.hive.ql.optimizer.physical.CommonJoinResolver.resolve(CommonJoinResolver.java:79)
> at
> org.apache.hadoop.hive.ql.optimizer.physical.PhysicalOptimizer.optimize(PhysicalOptimizer.java:107)
> at
> org.apache.hadoop.hive.ql.parse.MapReduceCompiler.optimizeTaskPlan(MapReduceCompiler.java:270)
> at
> org.apache.hadoop.hive.ql.parse.TaskCompiler.compile(TaskCompiler.java:227)
> at
> org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.analyzeInternal(SemanticAnalyzer.java:10084)
> at
> org.apache.hadoop.hive.ql.parse.CalcitePlanner.analyzeInternal(CalcitePlanner.java:203)
> at
> org.apache.hadoop.hive.ql.parse.BaseSemanticAnalyzer.analyze(BaseSemanticAnalyzer.java:225)
> at
> org.apache.hadoop.hive.ql.parse.ExplainSemanticAnalyzer.analyzeInternal(ExplainSemanticAnalyzer.java:74)
> at
> org.apache.hadoop.hive.ql.parse.BaseSemanticAnalyzer.analyze(BaseSemanticAnalyzer.java:225)
> ...
> {noformat}
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