[CRUNCH-23] PCollection#sort doesn't do a full sort on values

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.3.0
• Assignee: Rahul Sharma
• Reporter: Gabriel Reid
• Created: 21/Jul/12 11:38
• Updated: 25/Aug/12 19:32
• Resolved: 25/Aug/12 19:32

Description

When a PCollection is sorted (using PCollection#sort), the sorting that is performed is only per reducer, and not an absolute sort over all values. This means that the values are not in sorted order if they are iterated over on a materialized collection. It also means that the sorted files that are output from a sort operation can not be simply concatenated to come to a single sorted file.