Review Board 1.7.22


ZOOKEEPER-1413: Use on-disk transaction log for learner sync up

Review Request #11231 - Created May 20, 2013 and updated

Thawan Kooburat
https://issues.apache.org/jira/browse/ZOOKEEPER-1413
Reviewers
zookeeper
zookeeper
ZOOKEEPER-1413: Use on-disk transaction log for learner sync up

- Use txnlog for learner synchronization if learner fall too far behind
- Refactoring LearnerHandler to deal with different cases of handling learner synchronization  
- unit tests
- ran in prod for more than half a year
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Description From Last Updated Status
Review request changed
Updated (June 24, 2013, 8:40 a.m.)
- Move to new SLF4J.  The new version (1.7) require JDK5.  (ZK require 1.6 at the moment).  This is required to support new method signature. I can split this into a separate jira as well if needed
- Fix other comments and refactoring