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https://issues.apache.org/jira/browse/HIVE-14931?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15566856#comment-15566856
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Sergey Shelukhin commented on HIVE-14931:
-----------------------------------------
[~prasanth_j] fyi
> Merge + Union + DP + (Mini?)Tez/LLAP fails
> -------------------------------------------
>
> Key: HIVE-14931
> URL: https://issues.apache.org/jira/browse/HIVE-14931
> Project: Hive
> Issue Type: Bug
> Reporter: Sergey Shelukhin
>
> Running the following on MiniLlap or MiniTez CLI driver on master: {noformat}
> set hive.mapred.mode=nonstrict;
> set hive.exec.dynamic.partition.mode=nonstrict;
> set hive.fetch.task.conversion=none;
> set tez.grouping.min-size=1;
> set tez.grouping.max-size=2;
> set hive.tez.auto.reducer.parallelism=false;
> set hive.merge.orcfile.stripe.level=true;
> set hive.merge.tezfiles=true;
> set hive.merge.mapfiles=true;
> set hive.merge.mapredfiles=true;
> drop table intermediate;
> create table intermediate(key int) partitioned by (p int) stored as orc;
> insert into table intermediate partition(p='455') select distinct key from
> src where key >= 0 order by key desc limit 2;
> insert into table intermediate partition(p='456') select distinct key from
> src where key is not null order by key asc limit 2;
> create table merge_union_dp (id int) partitioned by (key int) stored as orc;
> insert into table merge_union_dp partition (key)
> select key as k0, key as k1 from intermediate
> union all
> select key as k0, key as k1 from intermediate;
> drop table merge_union_dp;
> drop table intermediate;
> {noformat}
> fails:
> {noformat}
> 2016-10-11T15:41:16,393 ERROR [TezChild] OrcFileMergeOperator: Closing
> operator..Exception: java.io.IOException: Multiple partitions for one merge
> mapper:
> hdfs://localhost:51206/build/ql/test/data/warehouse/merge_union_dp/.hive-staging_hive_2016-10-11_15-41-13_220_2560937429066666042-1/-ext-10002/key=0/1
> NOT EQUAL TO
> hdfs://localhost:51206/build/ql/test/data/warehouse/merge_union_dp/.hive-staging_hive_2016-10-11_15-41-13_220_2560937429066666042-1/-ext-10002/key=0/2
> at
> org.apache.hadoop.hive.ql.exec.AbstractFileMergeOperator.checkPartitionsMatch(AbstractFileMergeOperator.java:180)
> at
> org.apache.hadoop.hive.ql.exec.AbstractFileMergeOperator.fixTmpPath(AbstractFileMergeOperator.java:197)
> at
> org.apache.hadoop.hive.ql.exec.OrcFileMergeOperator.processKeyValuePairs(OrcFileMergeOperator.java:96)
> at
> org.apache.hadoop.hive.ql.exec.OrcFileMergeOperator.process(OrcFileMergeOperator.java:72)
> at
> org.apache.hadoop.hive.ql.exec.tez.MergeFileRecordProcessor.processRow(MergeFileRecordProcessor.java:216)
> at
> org.apache.hadoop.hive.ql.exec.tez.MergeFileRecordProcessor.run(MergeFileRecordProcessor.java:154)
> at
> org.apache.hadoop.hive.ql.exec.tez.TezProcessor.initializeAndRunProcessor(TezProcessor.java:185)
> at
> org.apache.hadoop.hive.ql.exec.tez.MergeFileTezProcessor.run(MergeFileTezProcessor.java:42)
> at
> org.apache.tez.runtime.LogicalIOProcessorRuntimeTask.run(LogicalIOProcessorRuntimeTask.java:370)
> at
> org.apache.tez.runtime.task.TaskRunner2Callable$1.run(TaskRunner2Callable.java:73)
> at
> org.apache.tez.runtime.task.TaskRunner2Callable$1.run(TaskRunner2Callable.java:61)
> at java.security.AccessController.doPrivileged(Native Method)
> at javax.security.auth.Subject.doAs(Subject.java:422)
> at
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1657)
> at
> org.apache.tez.runtime.task.TaskRunner2Callable.callInternal(TaskRunner2Callable.java:61)
> at
> org.apache.tez.runtime.task.TaskRunner2Callable.callInternal(TaskRunner2Callable.java:37)
> at org.apache.tez.common.CallableWithNdc.call(CallableWithNdc.java:36)
> at java.util.concurrent.FutureTask.run(FutureTask.java:266)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:745)
> {noformat}
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