[HIVE-9141] HiveOnTez: mix of union all, distinct, group by generates error

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.15.0
• Fix Version/s: 1.0.0
• Component/s: Tez
• Assignee: Navis Ryu
• Reporter: Pengcheng Xiong
• Created: 17/Dec/14 07:23
• Updated: 19/Feb/15 18:21
• Resolved: 19/Dec/14 00:28

Description

Here is the way to produce it:
in Hive q test setting (with src table)
set hive.execution.engine=tez;

SELECT key, value FROM
(
SELECT key, value FROM src

UNION ALL

SELECT key, key as value FROM

(
SELECT distinct key FROM (

SELECT key, value FROM
(SELECT key, value FROM src
UNION ALL
SELECT key, value FROM src
)t1
group by key, value
)t2
)t3

)t4
group by key, value;

will generate

2014-12-16 23:19:13,593 ERROR ql.Driver (SessionState.java:printError(834)) - FAILED: ClassCastException org.apache.hadoop.hive.ql.plan.MapWork cannot be cast to org.apache.hadoop.hive.ql.plan.ReduceWork
java.lang.ClassCastException: org.apache.hadoop.hive.ql.plan.MapWork cannot be cast to org.apache.hadoop.hive.ql.plan.ReduceWork
at org.apache.hadoop.hive.ql.parse.GenTezWork.process(GenTezWork.java:361)
at org.apache.hadoop.hive.ql.lib.DefaultRuleDispatcher.dispatch(DefaultRuleDispatcher.java:90)
at org.apache.hadoop.hive.ql.lib.DefaultGraphWalker.dispatchAndReturn(DefaultGraphWalker.java:94)
at org.apache.hadoop.hive.ql.parse.GenTezWorkWalker.walk(GenTezWorkWalker.java:87)
at org.apache.hadoop.hive.ql.parse.GenTezWorkWalker.walk(GenTezWorkWalker.java:103)
at org.apache.hadoop.hive.ql.parse.GenTezWorkWalker.walk(GenTezWorkWalker.java:103)
at org.apache.hadoop.hive.ql.parse.GenTezWorkWalker.walk(GenTezWorkWalker.java:103)
at org.apache.hadoop.hive.ql.parse.GenTezWorkWalker.walk(GenTezWorkWalker.java:103)
at org.apache.hadoop.hive.ql.parse.GenTezWorkWalker.startWalking(GenTezWorkWalker.java:69)
at org.apache.hadoop.hive.ql.parse.TezCompiler.generateTaskTree(TezCompiler.java:368)
at org.apache.hadoop.hive.ql.parse.TaskCompiler.compile(TaskCompiler.java:202)
at org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.analyzeInternal(SemanticAnalyzer.java:10202)
at org.apache.hadoop.hive.ql.parse.BaseSemanticAnalyzer.analyze(BaseSemanticAnalyzer.java:224)
at org.apache.hadoop.hive.ql.Driver.compile(Driver.java:419)
at org.apache.hadoop.hive.ql.Driver.compile(Driver.java:305)
at org.apache.hadoop.hive.ql.Driver.compileInternal(Driver.java:1107)
at org.apache.hadoop.hive.ql.Driver.runInternal(Driver.java:1155)
at org.apache.hadoop.hive.ql.Driver.run(Driver.java:1044)
at org.apache.hadoop.hive.ql.Driver.run(Driver.java:1034)
at org.apache.hadoop.hive.cli.CliDriver.processLocalCmd(CliDriver.java:206)
at org.apache.hadoop.hive.cli.CliDriver.processCmd(CliDriver.java:158)
at org.apache.hadoop.hive.cli.CliDriver.processLine(CliDriver.java:369)
at org.apache.hadoop.hive.cli.CliDriver.processLine(CliDriver.java:304)
at org.apache.hadoop.hive.ql.QTestUtil.executeClient(QTestUtil.java:834)
at org.apache.hadoop.hive.cli.TestMiniTezCliDriver.runTest(TestMiniTezCliDriver.java:136)
at org.apache.hadoop.hive.cli.TestMiniTezCliDriver.testCliDriver_uniontez2(TestMiniTezCliDriver.java:120)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)

Issue Links

• contains: HIVE-9150 Unrelated types are compared in GenTezWork#getFollowingWorkIndex()
• is related to: HIVE-9055 Tez: union all followed by group by followed by another union all gives error
• is related to: HIVE-9039 Support Union Distinct
• supercedes: HIVE-9131 MiniTez optimize_nullscan test is unstable