Re: [jira] Commented: (HADOOP-849) randomwriter fails with 'java.lang.OutOfMemoryError: Java heap space' in the 'reduce' task

[Doug Cutting]

Andrzej Bialecki wrote:
There is one significant incompatible change in this release:
https://issues.apache.org/jira/browse/HADOOP-451

Do you think this causes compatibility problems when reading/writing 
existing Nutch data? I.e. if we upgrade Nutch to 0.10, is there an issue 
here(apart from API changes) that could cause older data to become 
unreadable?

The incompatibility is code-level, not file-level.  Existing data on 
disk should be fine, only APIs have changed.

Doug