Pig
  1. Pig
  2. PIG-2689

JsonStorage fails to find schema when LimitAdjuster runs

    Details

    • Type: Bug Bug
    • Status: Open
    • Priority: Major Major
    • Resolution: Unresolved
    • Affects Version/s: 0.10.0
    • Fix Version/s: None
    • Component/s: None
    • Labels:
      None

      Description

      Scripts that both save out data with JsonStorage and trigger the LimitAdjuster (e.g. doing an order by followed by a limit) yield the following Exception:

      java.io.IOException: Could not find schema in UDF context
      at org.apache.pig.builtin.JsonStorage.prepareToWrite(JsonStorage.java:125)
      at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigOutputFormat$PigRecordWriter.<init>(PigOutputFormat.java:125)
      at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigOutputFormat.getRecordWriter(PigOutputFormat.java:86)
      at org.apache.hadoop.mapred.ReduceTask$NewTrackingRecordWriter.<init>(ReduceTask.java:569)
      at org.apache.hadoop.mapred.ReduceTask.runNewReducer(ReduceTask.java:638)
      at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:417)
      at org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:260)

      This happens b/c the LimitAdjuster does not copy the signature into it's newly created POStore, and hence JsonStorage looks for the schema for a null signature.

      1. PIG-2689.patch
        6 kB
        Doug Daniels

        Activity

        Doug Daniels created issue -
        Doug Daniels made changes -
        Field Original Value New Value
        Attachment PIG-2689.patch [ 12526055 ]
        Doug Daniels made changes -
        Status Open [ 1 ] Patch Available [ 10002 ]
        Alan Gates made changes -
        Status Patch Available [ 10002 ] Open [ 1 ]

          People

          • Assignee:
            Unassigned
            Reporter:
            Doug Daniels
          • Votes:
            2 Vote for this issue
            Watchers:
            3 Start watching this issue

            Dates

            • Created:
              Updated:

              Development