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https://issues.apache.org/jira/browse/PIG-3969?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Lorand Bendig updated PIG-3969:
-------------------------------
Attachment: PIG-3969.patch
> Javascript UDF fails if no output schema is defined
> ---------------------------------------------------
>
> Key: PIG-3969
> URL: https://issues.apache.org/jira/browse/PIG-3969
> Project: Pig
> Issue Type: Bug
> Affects Versions: 0.12.0
> Reporter: Lorand Bendig
> Assignee: Lorand Bendig
> Fix For: 0.14.0
>
> Attachments: PIG-3969.patch
>
>
> Example to reproduce the issue:
> {code}
> cat simple.js
> function test(word) {
> return word;
> }
> register 'simple.js' using org.apache.pig.scripting.js.JsScriptEngine as
> myfuncs;
> A = LOAD 'data' as (a:chararray);
> B = FOREACH A GENERATE myfuncs.test($0);
> {code}
> Pig Stack Trace
> ---------------
> ERROR 1200: <line 1, column 3> mismatched input '.' expecting EOF
> ...
> Caused by: java.lang.IllegalArgumentException: test.outputSchema is not a
> valid schema: <line 1, column 3> mismatched input '.' expecting EOF
> at org.apache.pig.scripting.js.JsFunction.<init>(JsFunction.java:184)
> ... 38 more
> Caused by: Failed to parse: <line 1, column 3> mismatched input '.'
> expecting EOF
> at
> org.apache.pig.parser.QueryParserDriver.parseSchema(QueryParserDriver.java:94)
> at
> org.apache.pig.parser.QueryParserDriver.parseSchema(QueryParserDriver.java:108)
> at org.apache.pig.impl.util.Utils.parseSchema(Utils.java:222)
> at org.apache.pig.impl.util.Utils.getSchemaFromString(Utils.java:196)
> at org.apache.pig.scripting.js.JsFunction.<init>(JsFunction.java:182)
> ... 38 more
> Problem: if no output schema is defined, an
> {{org.mozilla.javascript.Undefined}} object will be passed to
> {{Utils#getSchemaFromString}} which causes the exception.
> Should: if there's no schema defined, udf should return an unnamed bytearray
> field.
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