[HIVE-6998] Select query can only support maximum 128 distinct expressions

• Type: Bug
• Status: Patch Available
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 0.14.0
• Component/s: Query Processor, Serializers/Deserializers
• Assignee: Jesús Camacho Rodríguez
• Reporter: Chaoyu Tang
• Created: 01/May/14 15:40
• Updated: 27/Feb/24 21:52

Description

Select query can only support maximum 128 distinct expressions. Otherwise, you will be thrown ArrayIndexOutOfBoundsException. For a query like:
select count(distinct c1), count(distinct c2), count(distinct c3), count(distinct c4), count(distinct c5), count(distinct c6), ...., count(distinct c128), count(distinct c129) from tbl_129columns;

you will get error like:

java.lang.Exception: java.lang.RuntimeException: Hive Runtime Error while closing operators
        at org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:354)
Caused by: java.lang.RuntimeException: Hive Runtime Error while closing operators
        at org.apache.hadoop.hive.ql.exec.mr.ExecMapper.close(ExecMapper.java:260)
        at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:57)
        at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:430)
        at org.apache.hadoop.mapred.MapTask.run(MapTask.java:366)
        at org.apache.hadoop.mapred.LocalJobRunner$Job$MapTaskRunnable.run(LocalJobRunner.java:223)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:439)
        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
        at java.util.concurrent.FutureTask.run(FutureTask.java:138)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
        at java.lang.Thread.run(Thread.java:695)
Caused by: org.apache.hadoop.hive.ql.metadata.HiveException: org.apache.hadoop.hive.ql.metadata.HiveException: org.apache.hadoop.hive.ql.metadata.HiveException: java.lang.ArrayIndexOutOfBoundsException: -128
        at org.apache.hadoop.hive.ql.exec.GroupByOperator.closeOp(GroupByOperator.java:1141)
        at org.apache.hadoop.hive.ql.exec.Operator.close(Operator.java:579)
        at org.apache.hadoop.hive.ql.exec.Operator.close(Operator.java:591)
        at org.apache.hadoop.hive.ql.exec.Operator.close(Operator.java:591)
        at org.apache.hadoop.hive.ql.exec.Operator.close(Operator.java:591)
        at org.apache.hadoop.hive.ql.exec.mr.ExecMapper.close(ExecMapper.java:227)
        ... 10 more
Caused by: org.apache.hadoop.hive.ql.metadata.HiveException: org.apache.hadoop.hive.ql.metadata.HiveException: java.lang.ArrayIndexOutOfBoundsException: -128
        at org.apache.hadoop.hive.ql.exec.GroupByOperator.flush(GroupByOperator.java:1099)
        at org.apache.hadoop.hive.ql.exec.GroupByOperator.closeOp(GroupByOperator.java:1138)
        ... 15 more
Caused by: org.apache.hadoop.hive.ql.metadata.HiveException: java.lang.ArrayIndexOutOfBoundsException: -128
        at org.apache.hadoop.hive.ql.exec.ReduceSinkOperator.processOp(ReduceSinkOperator.java:327)
        at org.apache.hadoop.hive.ql.exec.Operator.forward(Operator.java:796)
        at org.apache.hadoop.hive.ql.exec.GroupByOperator.forward(GroupByOperator.java:1064)
        at org.apache.hadoop.hive.ql.exec.GroupByOperator.flush(GroupByOperator.java:1082)
        ... 16 more
Caused by: java.lang.ArrayIndexOutOfBoundsException: -128
        at java.util.ArrayList.get(ArrayList.java:324)
        at org.apache.hadoop.hive.serde2.binarysortable.BinarySortableSerDe.serialize(BinarySortableSerDe.java:838)
        at org.apache.hadoop.hive.serde2.binarysortable.BinarySortableSerDe.serialize(BinarySortableSerDe.java:600)
        at org.apache.hadoop.hive.ql.exec.ReduceSinkOperator.toHiveKey(ReduceSinkOperator.java:401)
        at org.apache.hadoop.hive.ql.exec.ReduceSinkOperator.processOp(ReduceSinkOperator.java:320)
        ... 19 more