hive-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Aihua Xu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-11617) Explain plan for multiple lateral views is very slow
Date Fri, 21 Aug 2015 12:31:45 GMT

    [ https://issues.apache.org/jira/browse/HIVE-11617?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14706690#comment-14706690
] 

Aihua Xu commented on HIVE-11617:
---------------------------------

For lateral view, there will be one parent with 2 children and one child with 2 parents. For
such case, seems PreOrderWalker could need to visit same nodes multiple times (including all
the descendants). That seems to cause the job to run for ever. I will investigate to switch
to a different Walker (something like level order walker). 

> Explain plan for multiple lateral views is very slow
> ----------------------------------------------------
>
>                 Key: HIVE-11617
>                 URL: https://issues.apache.org/jira/browse/HIVE-11617
>             Project: Hive
>          Issue Type: Bug
>          Components: Logical Optimizer
>            Reporter: Aihua Xu
>            Assignee: Aihua Xu
>
> The following explain job will be very slow or never finish if there are many lateral
views involved. High CPU usage is also noticed.
> {noformat}
> EXPLAIN
> SELECT
> *
> from
> (
>     SELECT * FROM table1 
> ) x
> LATERAL VIEW json_tuple(...) x1 
> LATERAL VIEW json_tuple(...) x2 
> ...
> {noformat}
> From jstack, the job is busy with preorder tree traverse. 
> {noformat}
> at java.util.regex.Matcher.getTextLength(Matcher.java:1234)
>         at java.util.regex.Matcher.reset(Matcher.java:308)
>         at java.util.regex.Matcher.<init>(Matcher.java:228)
>         at java.util.regex.Pattern.matcher(Pattern.java:1088)
>         at org.apache.hadoop.hive.ql.lib.RuleRegExp.cost(RuleRegExp.java:67)
>         at org.apache.hadoop.hive.ql.lib.DefaultRuleDispatcher.dispatch(DefaultRuleDispatcher.java:72)
>         at org.apache.hadoop.hive.ql.lib.DefaultGraphWalker.dispatchAndReturn(DefaultGraphWalker.java:94)
>         at org.apache.hadoop.hive.ql.lib.DefaultGraphWalker.dispatch(DefaultGraphWalker.java:78)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:56)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.PreOrderWalker.walk(PreOrderWalker.java:61)
>         at org.apache.hadoop.hive.ql.lib.DefaultGraphWalker.startWalking(DefaultGraphWalker.java:109)
>         at org.apache.hadoop.hive.ql.optimizer.lineage.Generator.transform(Generator.java:95)
>         at org.apache.hadoop.hive.ql.optimizer.Optimizer.optimize(Optimizer.java:182)
>         at org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.analyzeInternal(SemanticAnalyzer.java:10216)
>         at org.apache.hadoop.hive.ql.parse.CalcitePlanner.analyzeInternal(CalcitePlanner.java:192)
>         at org.apache.hadoop.hive.ql.parse.BaseSemanticAnalyzer.analyze(BaseSemanticAnalyzer.java:222)
>         at org.apache.hadoop.hive.ql.parse.ExplainSemanticAnalyzer.analyzeInternal(ExplainSemanticAnalyzer.java:74)
>         at org.apache.hadoop.hive.ql.parse.BaseSemanticAnalyzer.analyze(BaseSemanticAnalyzer.java:222)
>         at org.apache.hadoop.hive.ql.Driver.compile(Driver.java:421)
>         at org.apache.hadoop.hive.ql.Driver.compile(Driver.java:307)
>         at org.apache.hadoop.hive.ql.Driver.compileInternal(Driver.java:1110)
>         - locked <0x00000007f0eb9e28> (a java.lang.Object)
>         at org.apache.hadoop.hive.ql.Driver.runInternal(Driver.java:1158)
>         at org.apache.hadoop.hive.ql.Driver.run(Driver.java:1047)
>         at org.apache.hadoop.hive.ql.Driver.run(Driver.java:1037)
>         at org.apache.hadoop.hive.cli.CliDriver.processLocalCmd(CliDriver.java:207)
>         at org.apache.hadoop.hive.cli.CliDriver.processCmd(CliDriver.java:159)
>         at org.apache.hadoop.hive.cli.CliDriver.processLine(CliDriver.java:370)
>         at org.apache.hadoop.hive.cli.CliDriver.executeDriver(CliDriver.java:756)
>         at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:675)
>         at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:615)
>         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>         at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
>         at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>         at java.lang.reflect.Method.invoke(Method.java:606)
>         at org.apache.hadoop.util.RunJar.run(RunJar.java:221)
> {noformat}



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

Mime
View raw message