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Pig, mail # dev - Review Request: disable optimizations via pig properties


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Re: Review Request: disable optimizations via pig properties
Travis Crawford 2013-05-13, 23:50


> On May 13, 2013, 11:23 p.m., Julien Le Dem wrote:
> > src/org/apache/pig/newplan/logical/optimizer/LogicalPlanOptimizer.java, line 215
> > <https://reviews.apache.org/r/11032/diff/2/?file=290929#file290929line215>
> >
> >     would checkNotNull(ruleSet, "ruleSet") give a better error message ?
>
> Travis Crawford wrote:
>     I'm generally against checkNotNull in constructors because an NPE suggests the method did something wrong. checkArgument signals the caller did something wrong. Since this is validating input I'd like to continue using the latter.

More specifically:

- checkNotNull throws NullPointerException
- checkArgument throws IllegalArgumentException

Even if the check ensures an argument is not null, I think the latter exception more specifically signals why the error was thrown when checking an argument.
- Travis
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This is an automatically generated e-mail. To reply, visit:
https://reviews.apache.org/r/11032/#review20514
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On May 13, 2013, 8:35 p.m., Travis Crawford wrote:
>
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> https://reviews.apache.org/r/11032/
> -----------------------------------------------------------
>
> (Updated May 13, 2013, 8:35 p.m.)
>
>
> Review request for pig, Julien Le Dem, Bill Graham, and Feng Peng.
>
>
> Description
> -------
>
> Update pig to allow disabling optimizations via pig properties. Currently optimizations must be disabled via command-line options. Pig properties can be set in pig.properties, "set" commands in scripts themselves, and command-line -D options.
>
> The use-case is, for scripts that require certain optimizations to be disabled, allowing the script itself to disable the optimization. Currently whatever runs the script needs to specially handle disabling the optimization for that specific query.
>
>
> This addresses bug PIG-3317.
>     https://issues.apache.org/jira/browse/PIG-3317
>
>
> Diffs
> -----
>
>   src/docs/src/documentation/content/xdocs/perf.xml 108ae7e
>   src/org/apache/pig/Main.java f97ed9f
>   src/org/apache/pig/PigConstants.java ea77e97
>   src/org/apache/pig/backend/hadoop/executionengine/HExecutionEngine.java 4dab4e8
>   src/org/apache/pig/newplan/logical/optimizer/LogicalPlanOptimizer.java d26f381
>   test/org/apache/pig/test/TestEvalPipeline2.java 39cf807
>
> Diff: https://reviews.apache.org/r/11032/diff/
>
>
> Testing
> -------
>
> Manually tested on a fully-distributed cluster.
>
> THIS FAILS:
> PIG_CONF_DIR=/etc/pig/conf ./bin/pig -c query.pig
>
> THIS WORKS:
> PIG_CONF_DIR=/etc/pig/conf ./bin/pig -Dpig.optimizer.rules.disabled=ColumnMapKeyPrune -c query.pig
>
> Notice how "-Dpig.optimizer.rules.disabled=ColumnMapKeyPrune" specifies a pig property, which could be in pig.properties, or the script itself.
>
>
> Failure message:
>
> Pig Stack Trace
> ---------------
> ERROR 2229: Couldn't find matching uid -1 for project (Name: Project Type: bytearray Uid: 97550 Input: 0 Column: 1)
>
> org.apache.pig.impl.logicalLayer.FrontendException: ERROR 1067: Unable to explain alias null
> at org.apache.pig.PigServer.explain(PigServer.java:1057)
> at org.apache.pig.tools.grunt.GruntParser.explainCurrentBatch(GruntParser.java:419)
> at org.apache.pig.tools.grunt.GruntParser.processExplain(GruntParser.java:351)
> at org.apache.pig.tools.grunt.Grunt.checkScript(Grunt.java:98)
> at org.apache.pig.Main.run(Main.java:607)
> at org.apache.pig.Main.main(Main.java:152)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at org.apache.hadoop.util.RunJar.main(RunJar.java:186)
> Caused by: org.apache.pig.impl.logicalLayer.FrontendException: ERROR 2000: Error processing rule ColumnMapKeyPrune. Try -t ColumnMapKeyPrune