Lineage fail when flatten a bag
-------------------------------
Key: PIG-1741
URL: https://issues.apache.org/jira/browse/PIG-1741
Project: Pig
Issue Type: Bug
Components: impl
Affects Versions: 0.8.0
Reporter: Daniel Dai
Assignee: Daniel Dai
Fix For: 0.8.0
The following script fail:
{code}
a = load '1.txt' as (a0);
b = foreach a generate flatten((bag{tuple(map[])})a0) as b0:map[];
c = foreach b generate (long)b0#'key1';
dump c;
{code}
1.txt:
{([key1#1])}
Error message:
org.apache.pig.backend.executionengine.ExecException: ERROR 1075: Received a
bytearray from the UDF. Cannot determine how to convert the bytearray to long.
at
org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.POCast.getNext(POCast.java:286)
at
org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POForEach.processPlan(POForEach.java:361)
at
org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POForEach.getNext(POForEach.java:291)
at
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapBase.runPipeline(PigMapBase.java:236)
at
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapBase.map(PigMapBase.java:231)
at
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapBase.map(PigMapBase.java:53)
at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:144)
at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:621)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:305)
at
org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:177)
In logical plan:
{code}
fake: Store 1-30 Schema: {long} Type: Unknown
|
|---c: ForEach 1-29 Schema: {long} Type: bag
| |
| Cast 1-28--null FieldSchema: long Type: long
| |
| |---MapLookup 1-26 FieldSchema: bytearray Type: bytearray
| |
| |---Project 1-27 Projections: [0] Overloaded: false FieldSchema:
b0: map Type: map
| Input: b: ForEach 1-21
|
|---b: ForEach 1-21 Schema: {b0: map[ ]} Type: bag
| |
| Cast 1-20--org.apache.pig.builtin.PigStorage FieldSchema: a0:
bag({(map[ ])}) Type: bag
| |
| |---Project 1-19 Projections: [0] Overloaded: false FieldSchema:
a0: bytearray Type: bytearray
| Input: a: Load 1-15
|
|---a: Load 1-15 Schema: {a0: bytearray} Type: bag
{code}
Cast 1-28 get null caster. This error cannot be fixed by
-Dusenewlogicalplan=false flag.
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