Custom tuple results in "Unexpected datatype 110 while reading tuplefrom binary
file" while spilling
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Key: PIG-2550
URL: https://issues.apache.org/jira/browse/PIG-2550
Project: Pig
Issue Type: Bug
Affects Versions: 0.9.1, 0.8.1, 0.10
Reporter: Vivek Padmanabhan
In the below script ;
{code}
a = load 'gen_data/' AS (f1,f2);
b = load 'gen_data_02/' AS (f1,f2);
c = cogroup a by f1,b by f1;
d = foreach c generate
group,flatten(a),COUNT(b),flatten(UDFReturningMyCustomTuple(b,a));
store d into 'test006';
{code}
The udf (UDFReturningMyCustomTuple) returns a bag which contains custom tuples.
The script execution fails at the reducer side with the below exception while
reading back the spilled data,
2012-02-23 10:37:16,840 FATAL org.apache.pig.data.DefaultDataBag: Unable to
read our spill file.
org.apache.pig.backend.executionengine.ExecException: ERROR 2112: Unexpected
datatype 110 while reading tuple from binary file.
at
org.apache.pig.data.BinInterSedes.getTupleSize(BinInterSedes.java:133)
at
org.apache.pig.data.BinInterSedes.addColsToTuple(BinInterSedes.java:556)
at org.apache.pig.data.BinSedesTuple.readFields(BinSedesTuple.java:66)
at
org.apache.pig.data.DefaultDataBag$DefaultDataBagIterator.next(DefaultDataBag.java:215)
at
org.apache.pig.data.DefaultDataBag$DefaultDataBagIterator.hasNext(DefaultDataBag.java:158)
at
org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POForEach.processPlan(POForEach.java:301)
at
org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POForEach.getNext(POForEach.java:208)
at
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigGenericMapReduce$Reduce.runPipeline(PigGenericMapReduce.java:459)
at
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigGenericMapReduce$Reduce.processOnePackageOutput(PigGenericMapReduce.java:427)
at
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigGenericMapReduce$Reduce.reduce(PigGenericMapReduce.java:407)
at
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigGenericMapReduce$Reduce.reduce(PigGenericMapReduce.java:261)
at org.apache.hadoop.mapreduce.Reducer.run(Reducer.java:176)
at
org.apache.hadoop.mapred.ReduceTask.runNewReducer(ReduceTask.java:649)
at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:417)
at org.apache.hadoop.mapred.Child$4.run(Child.java:255)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:396)
at
org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1082)
at org.apache.hadoop.mapred.Child.main(Child.java:249)
It looks like while spilling we do MyCustomTuple.write(DataOutput out) which
writes the type as DataType.TUPLE (110),
but while reading back we always use BinSedesTuple.
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