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https://issues.apache.org/jira/browse/PIG-5019?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Murshid Chalaev updated PIG-5019:
---------------------------------
Attachment: test_pig14_udf .pig
input_example.gz
> Pig generates tons of warnings for udf with enabled warnings aggregation
> ------------------------------------------------------------------------
>
> Key: PIG-5019
> URL: https://issues.apache.org/jira/browse/PIG-5019
> Project: Pig
> Issue Type: Bug
> Components: internal-udfs
> Affects Versions: 0.14.0
> Reporter: Murshid Chalaev
> Attachments: input_example.gz, test_pig14_udf .pig
>
>
> For data set containing 9 lines the aggregated warning message is displayed
> {code}
> 2016-09-01 19:40:33,664 [main] WARN
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher
> - Encountered Warning UDF_WARNING_1 6 time(s).
> {code}
> but in contained logs I see a separate log message "Cannot
> extract group for input" for every not matching value
> {code}
> 2016-09-01 19:40:28,115 INFO [main]
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapOnly$Map:
> Aliases being processed per job phase (AliasName[line,offset]): M
> : b[10,4],b[-1,-1],extract_fields[17,17] C: R:
> 2016-09-01 19:40:28,122 WARN [main]
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigHadoopLogger:
> org.apache.pig.builtin.REGEX_EXTRACT(UDF_WARNING_1): RegexExtrac
> t : Cannot extract group for input /v1=1&v3=9
> 2016-09-01 19:40:28,124 WARN [main]
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigHadoopLogger:
> org.apache.pig.builtin.REGEX_EXTRACT(UDF_WARNING_1): RegexExtrac
> t : Cannot extract group for input /v2=3&v3=7
> 2016-09-01 19:40:28,124 WARN [main]
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigHadoopLogger:
> org.apache.pig.builtin.REGEX_EXTRACT(UDF_WARNING_1): RegexExtract : Cannot
> extract group for input /v1=4&v3=6
> 2016-09-01 19:40:28,125 WARN [main]
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigHadoopLogger:
> org.apache.pig.builtin.REGEX_EXTRACT(UDF_WARNING_1): RegexExtract : Cannot
> extract group for input /v2=5&v3=5
> 2016-09-01 19:40:28,125 WARN [main]
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigHadoopLogger:
> org.apache.pig.builtin.REGEX_EXTRACT(UDF_WARNING_1): RegexExtract : Cannot
> extract group for input /v1=8&v3=2
> 2016-09-01 19:40:28,125 WARN [main]
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigHadoopLogger:
> org.apache.pig.builtin.REGEX_EXTRACT(UDF_WARNING_1): RegexExtract : Cannot
> extract group for input /v3=9&v2=1
> {code}
> It does not log the warning messages in the task logs.
> The patch for PIG-2207 was committed to
> Pig 0.13+
> In 0.12 we had a single counter for all UDF warnings, but in 0.13+ we have
> separate counter and message for every unique warning log line.
> Two lines below are unique
> /v2=3&v3=7
> /v1=4&v3=6
> That's why Pig print both of them to the console.
> Printing a separate log message for every data line slows down the overall
> performance as well.
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