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https://issues.apache.org/jira/browse/PIG-98?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12570727#action_12570727
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Alan Gates commented on PIG-98:
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With the top of trunk, the script you give above produces:
2008-02-19 16:55:14,898 [main] ERROR org.apache.pig - Error message from task
(map) tip_200802061204_1977_m_000000 java.lang.NumberFormatException: For input
string: "ulysses thompson"
at
sun.misc.FloatingDecimal.readJavaFormatString(FloatingDecimal.java:1224)
at java.lang.Double.valueOf(Double.java:475)
at java.lang.Double.<init>(Double.java:567)
at org.apache.pig.data.DataAtom.numval(DataAtom.java:95)
at org.apache.pig.impl.eval.cond.CompCond.eval(CompCond.java:77)
at org.apache.pig.impl.eval.FilterSpec$1.add(FilterSpec.java:58)
at
org.apache.pig.impl.mapreduceExec.PigMapReduce.run(PigMapReduce.java:115)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:192)
at
org.apache.hadoop.mapred.TaskTracker$Child.main(TaskTracker.java:1760)
This is still not useful, but at least we're giving the full stack. I want to
leave this bug open though, because we should be giving decent error messages
here (like == not valid with string type or something).
> grunt should show full exception stack
> --------------------------------------
>
> Key: PIG-98
> URL: https://issues.apache.org/jira/browse/PIG-98
> Project: Pig
> Issue Type: Improvement
> Components: grunt
> Reporter: Stefan Groschupf
> Priority: Minor
> Fix For: 0.1.0
>
> Attachments: showStackTrace-20080207.patch
>
>
> I suggest grunt should be more helpful with user errors. I just did one (a
> stupid one) and it took my too long to figure out the problem, since grunts
> error message was just not giving me a good hint:
> grunt> A = LOAD '/pigtestData.tsv' USING PigStorage(',') AS (user,age,cat);
> grunt> B = FILTER A BY cat == 'book';
> grunt> dump B;
> For input string: "book"
> Experts will see that I tried to use == instead of eq, however especially new
> users could get a little confused.
> I see two chances add Error Number and descriptive texts (Oracle style) -
> this quite a lot of work, or for now I suggest to simply dump the full
> exception text.
> At least for this early stage it would developers and users to find problems
> faster.
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