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  1. Pig
  2. PIG-1979

New logical plan failing with ERROR 2229: Couldn't find matching uid -1



    • Type: Bug
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 0.8.0, 0.9.0
    • Fix Version/s: 0.8.1
    • Component/s: impl
    • Labels:
    • Hadoop Flags:


      The below is my script

      register myudf.jar;
      c01 = LOAD 'input'  USING org.test.MyTableLoader('');
      c02 = FILTER c01  BY result == 'OK'  AND formatted IS NOT NULL  AND formatted != '' ;
      c03 = FOREACH c02 GENERATE url, formatted, FLATTEN(usage);
      c04 = FOREACH c03 GENERATE usage::domain AS domain, url, formatted;
      doc_001 = FOREACH c04 GENERATE domain,url, FLATTEN(MyExtractor(formatted)) AS category;
      doc_004_1 = GROUP doc_001 BY (domain,url);
      doc_005 = FOREACH doc_004_1 GENERATE group.domain as domain, group.url as url, doc_001.category as category;
      STORE doc_005 INTO 'out_final' USING PigStorage();
      review1 = FOREACH c04 GENERATE domain,url, MyExtractor(formatted) AS rev;
      review2 = FILTER review1 BY SIZE(rev)>0;
      joinresult = JOIN review2 by (domain,url), doc_005 by (domain,url);
      finalresult = FOREACH joinresult GENERATE  doc_005::category;
      STORE finalresult INTO 'out_final' using PigStorage();

      The script is failing in building the plan, while applying for logical optimization rule for AddForEach.

      ERROR org.apache.pig.tools.grunt.Grunt - ERROR 2229: Couldn't find matching uid -1 for project (Name: Project Type: bytearray Uid: 106 Input: 0 Column: 5)

      The problem is happening when I try to include doc_005::category in the projection for relation finalresult. This is field is orginated from the udf org.vivek.udfs.MyExtractor (source given below).

      import java.io.IOException;
      import org.apache.pig.EvalFunc;
      import org.apache.pig.data.*;
      import org.apache.pig.impl.logicalLayer.FrontendException;
      import org.apache.pig.impl.logicalLayer.schema.Schema;
      import org.apache.pig.impl.logicalLayer.schema.Schema.FieldSchema;
      public class MyExtractor extends EvalFunc<DataBag>
      	public Schema outputSchema(Schema arg0) {
      	  try {
      			return Schema.generateNestedSchema(DataType.BAG, DataType.CHARARRAY);
      		} catch (FrontendException e) {
      			System.err.println("Error while generating schema. "+e);
      			return new Schema(new FieldSchema(null, DataType.BAG));
        public DataBag exec(Tuple inputTuple)
          throws IOException
          try {
            Tuple tp2 = TupleFactory.getInstance().newTuple(1);
            tp2.set(0, (inputTuple.get(0).toString()+inputTuple.hashCode()));
            DataBag retBag = BagFactory.getInstance().newDefaultBag();
            return retBag;
          catch (Exception e) {
            throw new IOException(" Caught exception", e);

      The script goes through fine if I disable AddForEach rule by -t AddForEach


        1. PIG-1979-1-trunk.patch
          3 kB
          Daniel Dai
        2. PIG-1979-1.patch
          2 kB
          Daniel Dai



            • Assignee:
              daijy Daniel Dai
              vivekp Vivek Padmanabhan
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              • Created: