CompositeInputFormat doesn't consider all tuples when run in a local task
tracker
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Key: MAPREDUCE-1223
URL: https://issues.apache.org/jira/browse/MAPREDUCE-1223
Project: Hadoop Map/Reduce
Issue Type: Bug
Affects Versions: 0.20.1
Environment: Yahoo distribution for Hadoop 0.20.1.3041192001 and
Cloudera Distribution for Hadoop 0.20.1+133
Reporter: Ed Kohlwey
The CrossJoin class does not emit all tuples representing the cross product of
values for a given key. The issue only occurs when using the local task
tracker, and not when running the job on a cluster.
Example
{noformat}
table 1
k1 -> a
table 2
k1 ->c
k1 ->d
{noformat}
The expected output is
{noformat}
table 1 inner join table 2
k1->ac
k1->ad
{noformat}
Instead one gets
{noformat}
table 1 inner join table 2
k1->ac
{noformat}
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